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dbx/crates/dbx-core/src/schema_diff.rs
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use std::collections::{HashMap, HashSet, VecDeque};
use log;
use rayon::prelude::*;
use regex::Regex;
use serde::{Deserialize, Serialize};
use crate::models::connection::DatabaseType;
use crate::sql_dialect::ddl_profile::{profile_for, DdlDialectProfile};
use crate::sql_dialect::descriptor::DialectKind;
use crate::sql_dialect::inference::{ColumnType, DefaultTypeInferenceEngine, TypeInferenceEngine};
use crate::sql_dialect::type_rewrite::{
apply_auto_inc_to_column_def, rewrite_column_type, type_looks_integer, AutoIncColumnBuild,
};
use crate::sql_parser::ast_filter::AstTransmitFilter;
use crate::types::{
ColumnInfo, ForeignKeyInfo, FunctionInfo, IndexInfo, OwnerInfo, RuleInfo, SequenceInfo, TableInfo, TriggerInfo,
};
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub enum ColumnAddPosition {
First,
After(String),
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct ColumnDiff {
#[serde(rename = "type")]
pub diff_type: String,
pub name: String,
#[serde(skip_serializing_if = "Option::is_none")]
pub source: Option<ColumnInfo>,
#[serde(skip_serializing_if = "Option::is_none")]
pub target: Option<ColumnInfo>,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub changes: Vec<String>,
#[serde(default, skip_serializing_if = "Option::is_none")]
pub add_position: Option<ColumnAddPosition>,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct IndexDiff {
#[serde(rename = "type")]
pub diff_type: String,
pub name: String,
#[serde(skip_serializing_if = "Option::is_none")]
pub source: Option<IndexInfo>,
#[serde(skip_serializing_if = "Option::is_none")]
pub target: Option<IndexInfo>,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub changes: Vec<String>,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct ForeignKeyDiff {
#[serde(rename = "type")]
pub diff_type: String,
pub name: String,
#[serde(skip_serializing_if = "Option::is_none")]
pub source: Option<ForeignKeyInfo>,
#[serde(skip_serializing_if = "Option::is_none")]
pub target: Option<ForeignKeyInfo>,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub changes: Vec<String>,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct TriggerDiff {
#[serde(rename = "type")]
pub diff_type: String,
pub name: String,
#[serde(skip_serializing_if = "Option::is_none")]
pub source: Option<TriggerInfo>,
#[serde(skip_serializing_if = "Option::is_none")]
pub target: Option<TriggerInfo>,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub changes: Vec<String>,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct FunctionDiff {
#[serde(rename = "type")]
pub diff_type: String,
pub name: String,
#[serde(skip_serializing_if = "Option::is_none")]
pub source: Option<FunctionInfo>,
#[serde(skip_serializing_if = "Option::is_none")]
pub target: Option<FunctionInfo>,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub changes: Vec<String>,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct SequenceDiff {
#[serde(rename = "type")]
pub diff_type: String,
pub name: String,
#[serde(skip_serializing_if = "Option::is_none")]
pub source: Option<SequenceInfo>,
#[serde(skip_serializing_if = "Option::is_none")]
pub target: Option<SequenceInfo>,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub changes: Vec<String>,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct RuleDiff {
#[serde(rename = "type")]
pub diff_type: String,
pub name: String,
#[serde(skip_serializing_if = "Option::is_none")]
pub source: Option<RuleInfo>,
#[serde(skip_serializing_if = "Option::is_none")]
pub target: Option<RuleInfo>,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub changes: Vec<String>,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct OwnerDiff {
#[serde(rename = "type")]
pub diff_type: String,
pub object_name: String,
#[serde(skip_serializing_if = "Option::is_none")]
pub source: Option<OwnerInfo>,
#[serde(skip_serializing_if = "Option::is_none")]
pub target: Option<OwnerInfo>,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub changes: Vec<String>,
}
#[derive(Debug, Clone, Serialize, Deserialize, Default)]
#[serde(rename_all = "camelCase")]
pub struct TableDiff {
#[serde(rename = "type")]
pub diff_type: String,
#[serde(skip_serializing_if = "Option::is_none")]
pub object_type: Option<String>,
pub name: String,
#[serde(skip_serializing_if = "Option::is_none")]
pub columns: Option<Vec<ColumnDiff>>,
#[serde(skip_serializing_if = "Option::is_none")]
pub indexes: Option<Vec<IndexDiff>>,
#[serde(skip_serializing_if = "Option::is_none")]
pub foreign_keys: Option<Vec<ForeignKeyDiff>>,
#[serde(skip_serializing_if = "Option::is_none")]
pub triggers: Option<Vec<TriggerDiff>>,
#[serde(skip_serializing_if = "Option::is_none")]
pub ddl: Option<String>,
#[serde(skip_serializing_if = "Option::is_none")]
pub target_ddl: Option<String>,
#[serde(skip_serializing_if = "Option::is_none")]
pub source_table_comment: Option<Option<String>>,
#[serde(skip_serializing_if = "Option::is_none")]
pub target_table_comment: Option<Option<String>>,
#[serde(default, skip_serializing_if = "Option::is_none")]
pub sync_sql: Option<String>,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct TableSchemaDetail {
pub name: String,
#[serde(default)]
pub columns: Vec<ColumnInfo>,
#[serde(default)]
pub indexes: Vec<IndexInfo>,
#[serde(default)]
pub foreign_keys: Vec<ForeignKeyInfo>,
#[serde(default)]
pub triggers: Vec<TriggerInfo>,
#[serde(default, skip_serializing_if = "Option::is_none")]
pub ddl: Option<String>,
}
#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
#[serde(rename_all = "camelCase")]
pub enum ParamStrategy {
Preserve,
Strip,
Custom,
}
fn default_param_strategy() -> ParamStrategy {
ParamStrategy::Preserve
}
/// A custom field type mapping override: source_type → target_type.
/// Used when source and target database types differ.
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct FieldMapping {
pub source_type: String,
pub target_type: String,
#[serde(default = "default_param_strategy")]
pub param_strategy: ParamStrategy,
#[serde(default, skip_serializing_if = "Option::is_none")]
pub custom_params: Option<String>,
}
impl FieldMapping {
pub fn apply<'a>(mappings: &'a [FieldMapping], source_type: &str) -> Option<&'a str> {
let base_type = source_type.split('(').next().unwrap_or(source_type).trim();
mappings.iter().find(|m| m.source_type.eq_ignore_ascii_case(base_type)).map(|m| m.target_type.as_str())
}
pub fn apply_with_params(mappings: &[FieldMapping], source_type: &str, target_kind: DialectKind) -> Option<String> {
let trimmed = source_type.trim();
let base_type = trimmed.split('(').next().unwrap_or(trimmed);
let source_params = &trimmed[base_type.len()..];
let matched = mappings.iter().find(|m| m.source_type.eq_ignore_ascii_case(base_type))?;
let result = match matched.param_strategy {
ParamStrategy::Strip => Some(matched.target_type.clone()),
ParamStrategy::Custom => match &matched.custom_params {
Some(params) if !params.is_empty() => {
let p = params.trim();
// Normalize: wrap bare params (e.g. "100") in parentheses so the
// generated type becomes e.g. `character(100)` rather than `character100`.
let formatted = if p.starts_with('(') { p.to_string() } else { format!("({})", p) };
Some(format!("{}{}", matched.target_type, formatted))
}
_ => Some(matched.target_type.clone()),
},
ParamStrategy::Preserve => {
let supports = type_supports_params(target_kind, &matched.target_type);
let has_params = !source_params.is_empty();
if has_params && supports {
Some(format!("{}{}", matched.target_type, source_params))
} else {
log::info!(
"apply_with_params[Preserve] source={} target={} strategy={:?} has_params={} supports_params={} -> bare {}",
source_type, matched.target_type, matched.param_strategy, has_params, supports, matched.target_type
);
Some(matched.target_type.clone())
}
}
};
log::info!(
"apply_with_params source={} target_type={} strategy={:?} result={:?}",
source_type,
matched.target_type,
matched.param_strategy,
result
);
result
}
}
fn type_supports_params(kind: DialectKind, type_name: &str) -> bool {
crate::sql_dialect::dialect_loader::register_core_dialects();
let registry = crate::sql_dialect::dialect_loader::DialectRegistry::global();
let all = registry.get_all_by_kind(kind);
if all.is_empty() {
return true;
}
all.iter().any(|loaded| {
loaded.yaml.types.iter().any(|t| {
(t.name.eq_ignore_ascii_case(type_name) || t.aliases.iter().any(|a| a.eq_ignore_ascii_case(type_name)))
&& (t.has_length || t.has_precision || t.max_precision.is_some())
})
})
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct SchemaDiffPreparationOptions {
#[serde(default)]
pub source_tables: Vec<TableInfo>,
#[serde(default)]
pub target_tables: Vec<TableInfo>,
#[serde(default)]
pub source_details: Vec<TableSchemaDetail>,
#[serde(default)]
pub target_details: Vec<TableSchemaDetail>,
#[serde(default)]
pub source_functions: Vec<FunctionInfo>,
#[serde(default)]
pub target_functions: Vec<FunctionInfo>,
#[serde(default)]
pub source_sequences: Vec<SequenceInfo>,
#[serde(default)]
pub target_sequences: Vec<SequenceInfo>,
#[serde(default)]
pub source_rules: Vec<RuleInfo>,
#[serde(default)]
pub target_rules: Vec<RuleInfo>,
#[serde(default)]
pub source_owners: Vec<OwnerInfo>,
#[serde(default)]
pub target_owners: Vec<OwnerInfo>,
pub database_type: DatabaseType,
#[serde(default, skip_serializing_if = "Option::is_none")]
pub target_schema: Option<String>,
#[serde(default)]
pub ignore_comments: bool,
#[serde(default)]
pub cascade_delete: bool,
#[serde(default)]
pub compare_column_order: bool,
#[serde(default)]
pub detect_renames: bool,
#[serde(default)]
pub detect_table_renames: bool,
#[serde(default)]
pub rename_threshold: f64,
#[serde(default)]
pub enable_rollback: bool,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub batch_patterns: Vec<BatchPattern>,
#[serde(default, skip_serializing_if = "Option::is_none")]
pub source_dialect: Option<DialectKind>,
#[serde(default, skip_serializing_if = "Option::is_none")]
pub target_dialect: Option<DialectKind>,
#[serde(default)]
pub compatibility_threshold: f64,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub source_permissions: Vec<PermissionInfo>,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub target_permissions: Vec<PermissionInfo>,
#[serde(default, skip_serializing_if = "Option::is_none")]
pub shard_strategy: Option<ShardStrategy>,
#[serde(default, skip_serializing_if = "Option::is_none")]
pub resource_constraint: Option<ResourceConstraint>,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub field_mappings: Vec<FieldMapping>,
}
#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
#[serde(rename_all = "camelCase")]
pub struct MissingRollbackObject {
pub kind: String,
pub name: String,
pub table: Option<String>,
pub reason: String,
}
#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
#[serde(rename_all = "camelCase")]
pub enum RollbackCompleteness {
#[serde(rename = "complete")]
Complete,
#[serde(rename = "incomplete")]
Incomplete,
}
impl RollbackCompleteness {
pub fn as_str(&self) -> &'static str {
match self {
Self::Complete => "complete",
Self::Incomplete => "incomplete",
}
}
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct SchemaDiffPreparation {
pub diffs: Vec<TableDiff>,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub function_diffs: Vec<FunctionDiff>,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub sequence_diffs: Vec<SequenceDiff>,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub rule_diffs: Vec<RuleDiff>,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub owner_diffs: Vec<OwnerDiff>,
pub sync_sql: String,
#[serde(default, skip_serializing_if = "Option::is_none")]
pub rollback_sync_sql: Option<String>,
/// Whether rollback SQL is complete enough to execute safely.
#[serde(default = "default_rollback_complete")]
pub rollback_completeness: RollbackCompleteness,
/// Objects that could not be reconstructed for rollback (e.g. triggers without body).
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub missing_rollback_objects: Vec<MissingRollbackObject>,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub rename_candidates: Vec<RenameCandidate>,
#[serde(default, skip_serializing_if = "Option::is_none")]
pub rollback_graph: Option<RollbackGraph>,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub compatibility_warnings: Vec<ColumnCompatibilityWarning>,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub permission_diffs: Vec<PermissionDiff>,
#[serde(default, skip_serializing_if = "Option::is_none")]
pub permission_sync_sql: Option<String>,
#[serde(default, skip_serializing_if = "Option::is_none")]
pub dependency_graph: Option<DependencyGraph>,
}
fn default_rollback_complete() -> RollbackCompleteness {
RollbackCompleteness::Complete
}
// ============================================================================
// Phase 4.1: Dependency Graph & Rename Detection
// ============================================================================
/// Regex-based text scanning for table references in SQL/DDL text.
/// Used as fallback when no live DB query (YAML metadata_queries.dependencies) is available.
fn extract_ddl_references(sql: &str, known_tables: &HashSet<&str>) -> Vec<String> {
let upper = sql.to_uppercase();
let mut refs: Vec<String> = Vec::new();
for table in known_tables {
let table_up = table.to_uppercase();
// Match after SQL keywords that indicate table references
let patterns = [
format!(" FROM {table_up}"),
format!(" JOIN {table_up}"),
format!(" INTO {table_up}"),
format!(" TABLE {table_up}"),
format!(" REFERENCES {table_up}"),
format!(" UPDATE {table_up}"),
format!("DELETE FROM {table_up}"),
format!("FROM {table_up} ("),
format!(" {table_up}."),
];
if patterns.iter().any(|p| upper.contains(p.as_str())) {
refs.push(table.to_string());
}
}
refs
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct DependencyNode {
pub table_name: String,
pub depends_on: Vec<String>,
pub depended_by: Vec<String>,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct DependencyGraph {
pub nodes: HashMap<String, DependencyNode>,
pub topological_order: Vec<String>,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct CoverageReport {
pub level1_score: f64,
pub level2_score: f64,
pub composite_score: f64,
pub level1_covered: u64,
pub level1_total: u64,
pub level2_covered: u64,
pub level2_total: u64,
pub uncovered_edges: Vec<UncoveredEdge>,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct UncoveredEdge {
pub from_table: String,
pub to_table: String,
pub level: u32,
}
impl DependencyGraph {
pub fn build(details: &[TableSchemaDetail], tables: &[TableInfo]) -> Self {
Self::build_with_functions(details, tables, &[], &[])
}
/// Extended build: also extracts dependencies from view DDLs, triggers, and function/sequence definitions.
/// Falls back to regex-based text scanning when no live DB query is available.
pub fn build_with_functions(
details: &[TableSchemaDetail],
tables: &[TableInfo],
functions: &[FunctionInfo],
_sequences: &[SequenceInfo],
) -> Self {
let table_names: HashSet<&str> =
tables.iter().filter(|t| !t.table_type.contains("VIEW")).map(|t| t.name.as_str()).collect();
let view_names: HashSet<&str> =
tables.iter().filter(|t| t.table_type.contains("VIEW")).map(|t| t.name.as_str()).collect();
let all_names: HashSet<&str> = tables.iter().map(|t| t.name.as_str()).collect();
let mut nodes: HashMap<String, DependencyNode> = all_names
.iter()
.map(|name| {
(
name.to_string(),
DependencyNode { table_name: name.to_string(), depends_on: Vec::new(), depended_by: Vec::new() },
)
})
.collect();
let detail_map: HashMap<&str, &TableSchemaDetail> = details.iter().map(|d| (d.name.as_str(), d)).collect();
let function_by_name: HashMap<&str, &FunctionInfo> = functions.iter().map(|f| (f.name.as_str(), f)).collect();
// Phase 1: FK-based dependencies (existing logic)
for table_name in &table_names {
if let Some(detail) = detail_map.get(table_name) {
for fk in &detail.foreign_keys {
if table_names.contains(fk.ref_table.as_str()) {
if let Some(node) = nodes.get_mut(*table_name) {
if !node.depends_on.contains(&fk.ref_table) {
node.depends_on.push(fk.ref_table.clone());
}
}
if let Some(ref_node) = nodes.get_mut(&fk.ref_table) {
if !ref_node.depended_by.iter().any(|d| d == *table_name) {
ref_node.depended_by.push((*table_name).to_string());
}
}
}
}
}
}
// Phase 2: View DDL text scanning
for view_name in &view_names {
if let Some(detail) = detail_map.get(view_name) {
if let Some(ddl) = &detail.ddl {
let refs = extract_ddl_references(ddl, &table_names);
for ref_table in refs {
if let Some(node) = nodes.get_mut(*view_name) {
if !node.depends_on.contains(&ref_table) {
node.depends_on.push(ref_table.clone());
}
}
if let Some(ref_node) = nodes.get_mut(&ref_table) {
if !ref_node.depended_by.iter().any(|d| d == *view_name) {
ref_node.depended_by.push((*view_name).to_string());
}
}
}
}
}
}
// Phase 3: Trigger statement text scanning
for table_name in &all_names {
if let Some(detail) = detail_map.get(table_name) {
for trigger in &detail.triggers {
if let Some(stmt) = &trigger.statement {
let refs = extract_ddl_references(stmt, &table_names);
for ref_table in refs {
if let Some(node) = nodes.get_mut(*table_name) {
if !node.depends_on.contains(&ref_table) {
node.depends_on.push(ref_table.clone());
}
}
if let Some(ref_node) = nodes.get_mut(&ref_table) {
if !ref_node.depended_by.iter().any(|d| d == *table_name) {
ref_node.depended_by.push((*table_name).to_string());
}
}
}
}
}
}
}
// Phase 4: Function definition text scanning
for (_func_name, func) in &function_by_name {
let refs = extract_ddl_references(&func.definition, &table_names);
for ref_table in &refs {
if let Some(ref_node) = nodes.get_mut(ref_table) {
if !ref_node.depended_by.iter().any(|d| d == _func_name) {
ref_node.depended_by.push(_func_name.to_string());
}
}
}
}
let topological_order = Self::topological_sort(&nodes);
DependencyGraph { nodes, topological_order }
}
fn topological_sort(nodes: &HashMap<String, DependencyNode>) -> Vec<String> {
let mut in_degree: HashMap<&str, usize> = nodes.keys().map(|k| (k.as_str(), 0usize)).collect();
for node in nodes.values() {
in_degree.entry(node.table_name.as_str()).or_insert(0);
for _dep in &node.depends_on {
*in_degree.entry(node.table_name.as_str()).or_insert(0) += 1;
}
}
let mut queue: VecDeque<&str> = in_degree.iter().filter(|(_, &deg)| deg == 0).map(|(&name, _)| name).collect();
let mut result = Vec::new();
while let Some(name) = queue.pop_front() {
result.push(name.to_string());
if let Some(node) = nodes.get(name) {
for dependent in &node.depended_by {
if let Some(deg) = in_degree.get_mut(dependent.as_str()) {
*deg -= 1;
if *deg == 0 {
queue.push_back(dependent.as_str());
}
}
}
}
}
if result.len() != nodes.len() {
let remaining: Vec<String> = nodes.keys().filter(|k| !result.contains(k)).cloned().collect();
result.extend(remaining);
}
result
}
pub fn build_order(&self) -> Vec<String> {
self.topological_order.clone()
}
pub fn drop_order(&self) -> Vec<String> {
let mut order = self.topological_order.clone();
order.reverse();
order
}
pub fn coverage_score(&self, diffed_tables: &[String]) -> f64 {
self.coverage_score_level1(diffed_tables)
}
pub fn coverage_score_level1(&self, diffed_tables: &[String]) -> f64 {
if self.nodes.is_empty() {
return 1.0;
}
let diffed_set: HashSet<&str> = diffed_tables.iter().map(|s| s.as_str()).collect();
let mut covered_edges = 0u64;
let mut total_edges = 0u64;
for node in self.nodes.values() {
for dep in &node.depends_on {
total_edges += 1;
if diffed_set.contains(node.table_name.as_str()) && diffed_set.contains(dep.as_str()) {
covered_edges += 1;
}
}
}
if total_edges == 0 {
1.0
} else {
covered_edges as f64 / total_edges as f64
}
}
pub fn coverage_score_level2(&self, diffed_tables: &[String]) -> f64 {
if self.nodes.is_empty() {
return 1.0;
}
let diffed_set: HashSet<&str> = diffed_tables.iter().map(|s| s.as_str()).collect();
let mut transitive_edges = 0u64;
let mut covered_transitive = 0u64;
for node in self.nodes.values() {
let table_name = node.table_name.as_str();
if !diffed_set.contains(table_name) {
continue;
}
for indirect in &node.depends_on {
if let Some(inner) = self.nodes.get(indirect) {
for grand in &inner.depends_on {
transitive_edges += 1;
if diffed_set.contains(table_name) && diffed_set.contains(grand.as_str()) {
covered_transitive += 1;
}
}
}
}
}
if transitive_edges == 0 {
1.0
} else {
covered_transitive as f64 / transitive_edges as f64
}
}
pub fn composite_coverage_score(&self, diffed_tables: &[String]) -> CoverageReport {
let diffed_set: HashSet<&str> = diffed_tables.iter().map(|s| s.as_str()).collect();
let (l1_covered, l1_total) = self.count_edges(diffed_tables, &diffed_set, 1);
let (l2_covered, l2_total) = self.count_transitive_edges(diffed_tables, &diffed_set);
let l1_score = if l1_total == 0 { 1.0 } else { l1_covered as f64 / l1_total as f64 };
let l2_score = if l2_total == 0 { 1.0 } else { l2_covered as f64 / l2_total as f64 };
let composite_score = 0.6 * l1_score + 0.4 * l2_score;
let uncovered = self.collect_uncovered_edges(diffed_tables, &diffed_set);
CoverageReport {
level1_score: l1_score,
level2_score: l2_score,
composite_score,
level1_covered: l1_covered,
level1_total: l1_total,
level2_covered: l2_covered,
level2_total: l2_total,
uncovered_edges: uncovered,
}
}
fn count_edges(&self, _diffed_tables: &[String], diffed_set: &HashSet<&str>, _level: u32) -> (u64, u64) {
let mut covered = 0u64;
let mut total = 0u64;
for node in self.nodes.values() {
for dep in &node.depends_on {
total += 1;
if diffed_set.contains(node.table_name.as_str()) && diffed_set.contains(dep.as_str()) {
covered += 1;
}
}
}
(covered, total)
}
fn count_transitive_edges(&self, _diffed_tables: &[String], diffed_set: &HashSet<&str>) -> (u64, u64) {
let mut covered = 0u64;
let mut total = 0u64;
for node in self.nodes.values() {
let table_name = node.table_name.as_str();
if !diffed_set.contains(table_name) {
continue;
}
for indirect in &node.depends_on {
if let Some(inner) = self.nodes.get(indirect) {
for grand in &inner.depends_on {
total += 1;
if diffed_set.contains(table_name) && diffed_set.contains(grand.as_str()) {
covered += 1;
}
}
}
}
}
(covered, total)
}
fn collect_uncovered_edges(&self, _diffed_tables: &[String], diffed_set: &HashSet<&str>) -> Vec<UncoveredEdge> {
let mut uncovered = Vec::new();
for node in self.nodes.values() {
for dep in &node.depends_on {
let both_covered = diffed_set.contains(node.table_name.as_str()) && diffed_set.contains(dep.as_str());
if !both_covered {
uncovered.push(UncoveredEdge {
from_table: node.table_name.clone(),
to_table: dep.clone(),
level: 1,
});
}
}
for indirect in &node.depends_on {
if let Some(inner) = self.nodes.get(indirect) {
for grand in &inner.depends_on {
let all_covered =
diffed_set.contains(node.table_name.as_str()) && diffed_set.contains(grand.as_str());
if !all_covered {
uncovered.push(UncoveredEdge {
from_table: node.table_name.clone(),
to_table: grand.clone(),
level: 2,
});
}
}
}
}
}
uncovered
}
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct RenameCandidate {
pub source_name: String,
pub target_name: String,
pub score: f64,
pub column_jaccard: f64,
pub type_similarity: f64,
}
fn jaccard_similarity(a: &HashSet<String>, b: &HashSet<String>) -> f64 {
if a.is_empty() && b.is_empty() {
return 1.0;
}
let intersection = a.intersection(b).count();
let union = a.union(b).count();
if union == 0 {
1.0
} else {
intersection as f64 / union as f64
}
}
fn column_type_similarity(source_cols: &[ColumnInfo], target_cols: &[ColumnInfo]) -> f64 {
if source_cols.is_empty() || target_cols.is_empty() {
return 0.0;
}
let engine = DefaultTypeInferenceEngine;
let source_map: HashMap<&str, &ColumnInfo> = source_cols.iter().map(|c| (c.name.as_str(), c)).collect();
let target_map: HashMap<&str, &ColumnInfo> = target_cols.iter().map(|c| (c.name.as_str(), c)).collect();
let common_names: HashSet<&str> = source_map.keys().filter(|k| target_map.contains_key(**k)).copied().collect();
if common_names.is_empty() {
return 0.0;
}
let total: f64 = common_names
.iter()
.map(|name| {
let s = ColumnType::parse(&source_map[name].data_type);
let t = ColumnType::parse(&target_map[name].data_type);
engine.type_compatibility_score(&s, &t)
})
.sum();
total / common_names.len() as f64
}
pub fn detect_renames(
removed: &[String],
added: &[String],
source_details: &[TableSchemaDetail],
target_details: &[TableSchemaDetail],
threshold: f64,
) -> Vec<RenameCandidate> {
let source_detail_map: HashMap<&str, &TableSchemaDetail> =
source_details.iter().map(|d| (d.name.as_str(), d)).collect();
let target_detail_map: HashMap<&str, &TableSchemaDetail> =
target_details.iter().map(|d| (d.name.as_str(), d)).collect();
let mut candidates = Vec::new();
for target_name in removed {
let Some(target_detail) = target_detail_map.get(target_name.as_str()) else { continue };
for source_name in added {
let Some(source_detail) = source_detail_map.get(source_name.as_str()) else { continue };
let col_names_source: HashSet<String> = source_detail.columns.iter().map(|c| c.name.clone()).collect();
let col_names_target: HashSet<String> = target_detail.columns.iter().map(|c| c.name.clone()).collect();
let column_jaccard = jaccard_similarity(&col_names_target, &col_names_source);
if column_jaccard < threshold {
continue;
}
let type_sim = column_type_similarity(&target_detail.columns, &source_detail.columns);
let score = column_jaccard * 0.6 + type_sim * 0.4;
if score >= threshold {
candidates.push(RenameCandidate {
source_name: source_name.clone(),
target_name: target_name.clone(),
score,
column_jaccard,
type_similarity: type_sim,
});
}
}
}
candidates.sort_by(|a, b| b.score.partial_cmp(&a.score).unwrap_or(std::cmp::Ordering::Equal));
let mut final_candidates = Vec::new();
let mut used_target: HashSet<String> = HashSet::new();
let mut used_source: HashSet<String> = HashSet::new();
for c in &candidates {
if !used_target.contains(&c.target_name) && !used_source.contains(&c.source_name) {
final_candidates.push(c.clone());
used_target.insert(c.target_name.clone());
used_source.insert(c.source_name.clone());
}
}
final_candidates
}
// ============================================================================
// Phase 4.2: Batch Naming Pattern Recognition
// ============================================================================
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct BatchPattern {
pub pattern: String,
pub is_regex: bool,
pub description: String,
}
pub fn diff_names_with_patterns(
source: &[String],
target: &[String],
patterns: &[BatchPattern],
) -> (Vec<String>, Vec<String>, Vec<String>, Vec<Vec<String>>) {
let (added, removed, common) = diff_names(source, target);
let mut pattern_matches: Vec<Vec<String>> = Vec::new();
for pattern in patterns {
let mut matches = Vec::new();
if pattern.is_regex {
if let Ok(re) = Regex::new(&pattern.pattern) {
for name in source {
if re.is_match(name) {
matches.push(name.clone());
}
}
}
} else {
let glob_pattern = pattern.pattern.replace('*', ".*").replace('?', ".");
if let Ok(re) = Regex::new(&format!("^{}$", glob_pattern)) {
for name in source {
if re.is_match(name) {
matches.push(name.clone());
}
}
}
}
if !matches.is_empty() {
pattern_matches.push(matches);
}
}
(added, removed, common, pattern_matches)
}
pub fn detect_pattern_conflicts(patterns: &[BatchPattern], names: &[String]) -> Vec<Vec<String>> {
let mut conflicts = Vec::new();
for i in 0..patterns.len() {
for j in (i + 1)..patterns.len() {
let pi = &patterns[i];
let pj = &patterns[j];
let pattern_i =
if pi.is_regex { pi.pattern.clone() } else { pi.pattern.replace('*', ".*").replace('?', ".") };
let pattern_j =
if pj.is_regex { pj.pattern.clone() } else { pj.pattern.replace('*', ".*").replace('?', ".") };
let re_i = Regex::new(&format!("^{}$", pattern_i));
let re_j = Regex::new(&format!("^{}$", pattern_j));
if let (Ok(ri), Ok(rj)) = (re_i, re_j) {
for name in names {
if ri.is_match(name) && rj.is_match(name) {
conflicts.push(vec![pi.description.clone(), pj.description.clone()]);
break;
}
}
}
}
}
conflicts
}
// ============================================================================
// Phase 4.3: Dialect-Aware Type Compatibility Scoring
// ============================================================================
pub fn diff_columns_with_compatibility(
source: &[ColumnInfo],
target: &[ColumnInfo],
ignore_comments: bool,
compare_column_order: bool,
source_dialect: DialectKind,
target_dialect: DialectKind,
compatibility_threshold: f64,
field_mappings: &[FieldMapping],
) -> (Vec<ColumnDiff>, Vec<ColumnCompatibilityWarning>) {
use crate::sql_dialect::descriptor::TypeMappingMatrix;
let matrix = TypeMappingMatrix::for_dialects(source_dialect, target_dialect);
let engine = DefaultTypeInferenceEngine;
let basic_diffs = diff_columns_with_options(source, target, ignore_comments, compare_column_order, false, 0.5);
let mut warnings = Vec::new();
let mut enhanced_diffs = Vec::new();
for diff in basic_diffs {
let mut warning = None;
if diff.diff_type == "modified" {
if let (Some(src), Some(tgt)) = (&diff.source, &diff.target) {
let src_parsed = ColumnType::parse(&src.data_type);
let tgt_parsed = ColumnType::parse(&tgt.data_type);
let compatibility = engine.type_compatibility_score(&src_parsed, &tgt_parsed);
let (mapped_type, requires_cast) = if let Some(user_target) =
FieldMapping::apply_with_params(field_mappings, &src.data_type, target_dialect)
{
(user_target, false)
} else {
matrix.convert_type(&tgt.data_type)
};
let risk = if compatibility >= 0.9 {
ColumnConversionRisk::None
} else if compatibility >= 0.7 {
ColumnConversionRisk::Low
} else if compatibility >= 0.5 {
ColumnConversionRisk::Medium
} else {
ColumnConversionRisk::High
};
if compatibility < compatibility_threshold {
warning = Some(ColumnCompatibilityWarning {
column_name: diff.name.clone(),
source_type: src.data_type.clone(),
target_type: tgt.data_type.clone(),
compatibility_score: compatibility,
suggested_mapping: mapped_type,
requires_cast,
risk,
});
}
}
}
enhanced_diffs.push(diff);
if let Some(w) = warning {
warnings.push(w);
}
}
(enhanced_diffs, warnings)
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct ColumnCompatibilityWarning {
pub column_name: String,
pub source_type: String,
pub target_type: String,
pub compatibility_score: f64,
pub suggested_mapping: String,
pub requires_cast: bool,
pub risk: ColumnConversionRisk,
}
#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
#[serde(rename_all = "camelCase")]
pub enum ColumnConversionRisk {
None,
Low,
Medium,
High,
}
// ============================================================================
// Phase 4.4: Bidirectional Diff & Rollback Graph
// ============================================================================
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct DiffNode {
pub table_diff: TableDiff,
pub direction: DiffDirection,
pub dependency_order: usize,
#[serde(skip_serializing_if = "Option::is_none")]
pub rename_source: Option<String>,
#[serde(skip_serializing_if = "Option::is_none")]
pub rename_target: Option<String>,
#[serde(skip_serializing_if = "Option::is_none")]
pub rename_score: Option<f64>,
}
#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
#[serde(rename_all = "camelCase")]
pub enum DiffDirection {
Forward,
Rollback,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct RollbackGraph {
pub forward_nodes: Vec<DiffNode>,
pub rollback_nodes: Vec<DiffNode>,
pub is_consistent: bool,
pub consistency_issues: Vec<String>,
}
impl RollbackGraph {
pub fn from_forward_diffs(
forward_diffs: &[TableDiff],
renames: &[RenameCandidate],
dep_graph: &DependencyGraph,
) -> Self {
let mut forward_nodes = Vec::new();
let mut rollback_nodes = Vec::new();
let consistency_issues = Vec::new();
let rename_map: HashMap<&str, &RenameCandidate> = renames.iter().map(|r| (r.target_name.as_str(), r)).collect();
let rename_reverse: HashMap<&str, &str> =
renames.iter().map(|r| (r.source_name.as_str(), r.target_name.as_str())).collect();
let order_map: HashMap<&str, usize> =
dep_graph.topological_order.iter().enumerate().map(|(i, name)| (name.as_str(), i)).collect();
for diff in forward_diffs {
let order = order_map.get(diff.name.as_str()).copied().unwrap_or(usize::MAX);
let (rename_source, rename_target, rename_score) = if diff.diff_type == "added" {
if let Some(rc) = rename_reverse.get(diff.name.as_str()) {
(Some(rc.to_string()), Some(diff.name.clone()), None)
} else {
(None, None, None)
}
} else if diff.diff_type == "removed" {
if let Some(rc) = rename_map.get(diff.name.as_str()) {
(Some(diff.name.clone()), Some(rc.source_name.clone()), Some(rc.score))
} else {
(None, None, None)
}
} else {
(None, None, None)
};
forward_nodes.push(DiffNode {
table_diff: diff.clone(),
direction: DiffDirection::Forward,
dependency_order: order,
rename_source,
rename_target,
rename_score,
});
let rollback_diff = Self::invert_diff(diff);
rollback_nodes.push(DiffNode {
table_diff: rollback_diff,
direction: DiffDirection::Rollback,
dependency_order: order,
rename_source: None,
rename_target: None,
rename_score: None,
});
}
RollbackGraph { forward_nodes, rollback_nodes, is_consistent: false, consistency_issues }
}
fn invert_diff_type(dt: &str) -> &str {
match dt {
"added" => "removed",
"removed" => "added",
"renamed" => "renamed",
_ => "modified",
}
}
fn invert_change_string(ch: &str) -> String {
if let Some(_pos) = ch.find(" → ") {
let parts: Vec<&str> = ch.split(" → ").collect();
if parts.len() == 2 {
format!("{} → {}", parts[1], parts[0])
} else {
ch.to_string()
}
} else {
ch.to_string()
}
}
fn invert_columns(cols: &[ColumnDiff]) -> Vec<ColumnDiff> {
cols.iter()
.map(|c| {
let inverted_name = if c.diff_type == "renamed" {
c.target.as_ref().map(|t| t.name.clone()).unwrap_or_else(|| c.name.clone())
} else {
c.name.clone()
};
ColumnDiff {
diff_type: Self::invert_diff_type(&c.diff_type).to_string(),
name: inverted_name,
source: c.target.clone(),
target: c.source.clone(),
changes: c.changes.iter().map(|ch| Self::invert_change_string(ch)).collect(),
add_position: c.add_position.clone(),
}
})
.collect()
}
fn invert_indexes(idxs: &[IndexDiff]) -> Vec<IndexDiff> {
idxs.iter()
.map(|i| IndexDiff {
diff_type: Self::invert_diff_type(&i.diff_type).to_string(),
name: i.name.clone(),
source: i.target.clone(),
target: i.source.clone(),
changes: i.changes.clone(),
})
.collect()
}
fn invert_fks(fks: &[ForeignKeyDiff]) -> Vec<ForeignKeyDiff> {
fks.iter()
.map(|fk| ForeignKeyDiff {
diff_type: Self::invert_diff_type(&fk.diff_type).to_string(),
name: fk.name.clone(),
source: fk.target.clone(),
target: fk.source.clone(),
changes: fk.changes.clone(),
})
.collect()
}
fn invert_triggers(trgs: &[TriggerDiff]) -> Vec<TriggerDiff> {
trgs.iter()
.map(|t| TriggerDiff {
diff_type: Self::invert_diff_type(&t.diff_type).to_string(),
name: t.name.clone(),
source: t.target.clone(),
target: t.source.clone(),
changes: t.changes.clone(),
})
.collect()
}
fn invert_diff(diff: &TableDiff) -> TableDiff {
let inverted_type = Self::invert_diff_type(&diff.diff_type).to_string();
let inverted_columns = diff.columns.as_ref().map(|cols| Self::invert_columns(cols));
let inverted_indexes = diff.indexes.as_ref().map(|idxs| Self::invert_indexes(idxs));
let inverted_fks = diff.foreign_keys.as_ref().map(|fks| Self::invert_fks(fks));
let inverted_triggers = diff.triggers.as_ref().map(|trgs| Self::invert_triggers(trgs));
let (source_comment, target_comment) = match inverted_type.as_str() {
"added" => (diff.target_table_comment.clone(), diff.source_table_comment.clone()),
"removed" => (diff.source_table_comment.clone(), diff.target_table_comment.clone()),
_ => (diff.target_table_comment.clone(), diff.source_table_comment.clone()),
};
let recreates_removed_table =
diff.diff_type == "removed" && inverted_type == "added" && diff.object_type.as_deref() == Some("table");
TableDiff {
diff_type: inverted_type,
object_type: diff.object_type.clone(),
name: diff.name.clone(),
columns: inverted_columns,
indexes: inverted_indexes,
foreign_keys: inverted_fks,
triggers: inverted_triggers,
// Rollback recreation must use the structured snapshot first. Keep
// native target DDL isolated as a same-target-dialect fallback.
ddl: if recreates_removed_table { None } else { diff.target_ddl.clone() },
target_ddl: if recreates_removed_table { diff.target_ddl.clone() } else { diff.ddl.clone() },
source_table_comment: source_comment,
target_table_comment: target_comment,
sync_sql: None,
}
}
pub fn validate_consistency(&mut self) -> bool {
self.consistency_issues.clear();
for fwd in &self.forward_nodes {
let has_rollback = self.rollback_nodes.iter().any(|rbk| {
rbk.table_diff.name == fwd.table_diff.name
&& matches!(
(fwd.table_diff.diff_type.as_str(), rbk.table_diff.diff_type.as_str()),
("added", "removed") | ("removed", "added") | ("modified", "modified") | ("none", "none")
)
});
if !has_rollback {
self.consistency_issues.push(format!(
"No rollback entry for forward {}: {}",
fwd.table_diff.diff_type, fwd.table_diff.name
));
}
let rollback_of_rollback: Vec<_> = self
.rollback_nodes
.iter()
.filter(|rbk| rbk.table_diff.name == fwd.table_diff.name)
.map(|rbk| Self::invert_diff(&rbk.table_diff))
.collect();
for ror in &rollback_of_rollback {
if ror.diff_type != fwd.table_diff.diff_type {
self.consistency_issues.push(format!(
"Forward∘Rollback mismatch for {}: forward={}, rollback∘rollback={}",
fwd.table_diff.name, fwd.table_diff.diff_type, ror.diff_type
));
}
}
}
self.is_consistent = self.consistency_issues.is_empty();
self.is_consistent
}
}
pub fn generate_rollback_sync_sql(
rollback_graph: &RollbackGraph,
db_type: DatabaseType,
schema: Option<&str>,
cascade_delete: bool,
) -> String {
generate_rollback_sync_sql_with_missing(rollback_graph, db_type, schema, cascade_delete).0
}
pub fn generate_rollback_sync_sql_with_missing(
rollback_graph: &RollbackGraph,
db_type: DatabaseType,
schema: Option<&str>,
cascade_delete: bool,
) -> (String, Vec<MissingRollbackObject>) {
let rollback_diffs: Vec<TableDiff> = rollback_graph.rollback_nodes.iter().map(|n| n.table_diff.clone()).collect();
generate_schema_sync_sql_inner(&rollback_diffs, &[], &[], &[], &[], db_type, schema, cascade_delete, None, &[])
}
// ============================================================================
// Phase 4.5: Shard-Parallel Comparison
// ============================================================================
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ShardStrategy {
pub shard_count: usize,
pub shard_by: ShardBy,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum ShardBy {
Table,
Schema,
RoundRobin,
}
pub fn shard_diff(options: &SchemaDiffPreparationOptions, shard_strategy: &ShardStrategy) -> Vec<TableDiff> {
let table_count = options.source_tables.len().max(options.target_tables.len());
let shard_count = shard_strategy.shard_count.min(table_count.max(1));
if shard_count <= 1 {
return diff_schema(options);
}
let source_table_names: Vec<&str> =
options.source_tables.iter().filter(|t| !t.table_type.contains("VIEW")).map(|t| t.name.as_str()).collect();
let source_view_names: Vec<&str> =
options.source_tables.iter().filter(|t| t.table_type.contains("VIEW")).map(|t| t.name.as_str()).collect();
let _target_table_names: Vec<&str> =
options.target_tables.iter().filter(|t| !t.table_type.contains("VIEW")).map(|t| t.name.as_str()).collect();
let _target_view_names: Vec<&str> =
options.target_tables.iter().filter(|t| t.table_type.contains("VIEW")).map(|t| t.name.as_str()).collect();
let source_all: Vec<&str> = source_table_names.iter().chain(source_view_names.iter()).copied().collect();
let shards: Vec<Vec<&str>> = match &shard_strategy.shard_by {
ShardBy::Table | ShardBy::RoundRobin => {
let mut s: Vec<Vec<&str>> = vec![Vec::new(); shard_count];
for (i, name) in source_all.iter().enumerate() {
s[i % shard_count].push(*name);
}
s
}
ShardBy::Schema => {
let mut schema_groups: HashMap<&str, Vec<&str>> = HashMap::new();
for table in &options.source_tables {
let schema = table.parent_schema.as_deref().unwrap_or("default");
schema_groups.entry(schema).or_default().push(table.name.as_str());
}
let mut s: Vec<Vec<&str>> = vec![Vec::new(); shard_count];
for (i, (_schema, names)) in schema_groups.iter().enumerate() {
s[i % shard_count].extend(names);
}
s
}
};
let shard_results: Vec<Vec<TableDiff>> = shards
.par_iter()
.filter(|shard| !shard.is_empty())
.map(|shard| {
let shard_set: HashSet<&str> = shard.iter().copied().collect();
let shard_options = SchemaDiffPreparationOptions {
source_tables: options
.source_tables
.iter()
.filter(|t| shard_set.contains(t.name.as_str()))
.cloned()
.collect(),
target_tables: options
.target_tables
.iter()
.filter(|t| shard_set.contains(t.name.as_str()))
.cloned()
.collect(),
source_details: options
.source_details
.iter()
.filter(|d| shard_set.contains(d.name.as_str()))
.cloned()
.collect(),
target_details: options
.target_details
.iter()
.filter(|d| shard_set.contains(d.name.as_str()))
.cloned()
.collect(),
source_functions: options.source_functions.clone(),
target_functions: options.target_functions.clone(),
source_sequences: options.source_sequences.clone(),
target_sequences: options.target_sequences.clone(),
source_rules: options.source_rules.clone(),
target_rules: options.target_rules.clone(),
source_owners: options.source_owners.clone(),
target_owners: options.target_owners.clone(),
database_type: options.database_type,
target_schema: options.target_schema.clone(),
ignore_comments: options.ignore_comments,
cascade_delete: options.cascade_delete,
compare_column_order: options.compare_column_order,
source_dialect: options.source_dialect,
target_dialect: options.target_dialect,
..Default::default()
};
diff_schema(&shard_options)
})
.collect();
let mut merged: Vec<TableDiff> = Vec::new();
for shard_result in shard_results {
merged.extend(shard_result);
}
merged.sort_by(|a, b| a.name.cmp(&b.name));
merged.dedup_by(|a, b| a.name == b.name && a.diff_type == b.diff_type);
merged
}
// ============================================================================
// Phase 4.6: Permission & Role-Aware Sync
// ============================================================================
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct PermissionInfo {
pub grantee: String,
pub object_type: String,
pub object_name: String,
pub privilege: String,
pub is_grantable: bool,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct PermissionDiff {
#[serde(rename = "type")]
pub diff_type: String,
pub grantee: String,
pub object_name: String,
pub privilege: String,
#[serde(skip_serializing_if = "Option::is_none")]
pub source: Option<PermissionInfo>,
#[serde(skip_serializing_if = "Option::is_none")]
pub target: Option<PermissionInfo>,
}
pub fn diff_permissions(source: &[PermissionInfo], target: &[PermissionInfo]) -> Vec<PermissionDiff> {
let mut diffs = Vec::new();
let target_map: HashMap<(&str, &str, &str), &PermissionInfo> =
target.iter().map(|p| ((p.grantee.as_str(), p.object_name.as_str(), p.privilege.as_str()), p)).collect();
let source_map: HashMap<(&str, &str, &str), &PermissionInfo> =
source.iter().map(|p| ((p.grantee.as_str(), p.object_name.as_str(), p.privilege.as_str()), p)).collect();
for sp in source {
let key = (sp.grantee.as_str(), sp.object_name.as_str(), sp.privilege.as_str());
if !target_map.contains_key(&key) {
diffs.push(PermissionDiff {
diff_type: "added".to_string(),
grantee: sp.grantee.clone(),
object_name: sp.object_name.clone(),
privilege: sp.privilege.clone(),
source: Some(sp.clone()),
target: None,
});
}
}
for tp in target {
let key = (tp.grantee.as_str(), tp.object_name.as_str(), tp.privilege.as_str());
if !source_map.contains_key(&key) {
diffs.push(PermissionDiff {
diff_type: "removed".to_string(),
grantee: tp.grantee.clone(),
object_name: tp.object_name.clone(),
privilege: tp.privilege.clone(),
source: None,
target: Some(tp.clone()),
});
}
}
diffs
}
pub fn generate_permission_sync_sql(diffs: &[PermissionDiff], db_type: DatabaseType, schema: Option<&str>) -> String {
let mut lines: Vec<String> = Vec::new();
let profile = profile_for(db_type);
for diff in diffs {
match diff.diff_type.as_str() {
"added" => {
if let Some(source) = &diff.source {
if profile.grant_uses_mysql_user_syntax {
let object_path = if let Some(sch) = schema {
format!("`{}`.`{}`", sch.replace('`', "``"), source.object_name.replace('`', "``"))
} else {
format!("`{}`", source.object_name.replace('`', "``"))
};
let with_grant = if source.is_grantable { " WITH GRANT OPTION" } else { "" };
let grantee_escaped = source.grantee.replace('\'', "''");
lines.push(format!(
"GRANT {} ON {} TO '{}'{};",
source.privilege, object_path, grantee_escaped, with_grant
));
} else {
let obj_escaped = source.object_name.replace('"', "\"\"");
let object_path = if let Some(sch) = schema {
format!("{} \"{}\".\"{}\"", source.object_type, sch, obj_escaped)
} else {
format!("{} \"{}\"", source.object_type, obj_escaped)
};
let with_grant = if source.is_grantable { " WITH GRANT OPTION" } else { "" };
let grantee_escaped = source.grantee.replace('"', "\"\"");
lines.push(format!(
"GRANT {} ON {} TO \"{}\"{};",
source.privilege, object_path, grantee_escaped, with_grant
));
}
}
}
"removed" => {
if let Some(target) = &diff.target {
if profile.grant_uses_mysql_user_syntax {
let object_path = if let Some(sch) = schema {
format!("`{}`.`{}`", sch.replace('`', "``"), target.object_name.replace('`', "``"))
} else {
format!("`{}`", target.object_name.replace('`', "``"))
};
let grantee_escaped = target.grantee.replace('\'', "''");
lines.push(format!(
"REVOKE {} ON {} FROM '{}';",
target.privilege, object_path, grantee_escaped
));
} else {
let obj_escaped = target.object_name.replace('"', "\"\"");
let object_path = if let Some(sch) = schema {
format!("{} \"{}\".\"{}\"", target.object_type, sch, obj_escaped)
} else {
format!("{} \"{}\"", target.object_type, obj_escaped)
};
let grantee_escaped = target.grantee.replace('"', "\"\"");
lines.push(format!(
"REVOKE {} ON {} FROM \"{}\";",
target.privilege, object_path, grantee_escaped
));
}
}
}
_ => {}
}
}
lines.join("\n")
}
// ============================================================================
// Phase 4.7: Metadata Resource-Aware Scheduling
// ============================================================================
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ResourceConstraint {
pub max_concurrent_connections: usize,
pub max_memory_mb: u64,
pub max_tables_per_batch: usize,
pub throttle_delay_ms: u64,
}
impl Default for ResourceConstraint {
fn default() -> Self {
Self { max_concurrent_connections: 4, max_memory_mb: 512, max_tables_per_batch: 50, throttle_delay_ms: 100 }
}
}
#[derive(Debug, Clone)]
pub struct AdaptiveScheduler {
pub constraint: ResourceConstraint,
pub current_connections: usize,
pub estimated_table_count: usize,
}
impl AdaptiveScheduler {
pub fn new(constraint: ResourceConstraint, table_count: usize) -> Self {
Self { constraint, current_connections: 0, estimated_table_count: table_count }
}
pub fn optimal_batch_size(&self) -> usize {
let conn_limit = self.constraint.max_concurrent_connections;
let mem_limit = self.constraint.max_memory_mb as usize * 50;
let table_limit = self.constraint.max_tables_per_batch;
let batches = self.estimated_table_count.max(1);
let per_batch = (self.estimated_table_count / conn_limit).max(1);
per_batch.min(mem_limit / batches).min(table_limit)
}
pub fn recommended_shard_count(&self) -> usize {
let per_batch = self.optimal_batch_size();
let count = (self.estimated_table_count as f64 / per_batch as f64).ceil() as usize;
count.min(self.constraint.max_concurrent_connections).max(1)
}
pub fn throttle_delay_ms(&self) -> u64 {
self.constraint.throttle_delay_ms
}
}
// ============================================================================
// Phase 4: Extended SchemaDiffPreparationOptions & SchemaDiffPreparation
// ============================================================================
impl Default for SchemaDiffPreparationOptions {
fn default() -> Self {
Self {
source_tables: Vec::new(),
target_tables: Vec::new(),
source_details: Vec::new(),
target_details: Vec::new(),
source_functions: Vec::new(),
target_functions: Vec::new(),
source_sequences: Vec::new(),
target_sequences: Vec::new(),
source_rules: Vec::new(),
target_rules: Vec::new(),
source_owners: Vec::new(),
target_owners: Vec::new(),
database_type: DatabaseType::Sqlite,
target_schema: None,
ignore_comments: false,
cascade_delete: false,
compare_column_order: false,
detect_renames: false,
detect_table_renames: false,
rename_threshold: 0.5,
enable_rollback: false,
batch_patterns: Vec::new(),
source_dialect: None,
target_dialect: None,
compatibility_threshold: 0.5,
source_permissions: Vec::new(),
target_permissions: Vec::new(),
shard_strategy: None,
resource_constraint: None,
field_mappings: Vec::new(),
}
}
}
// Add new optional fields to SchemaDiffPreparationOptions
// These are added as separate impl blocks to avoid breaking existing construction sites
impl SchemaDiffPreparationOptions {
pub fn with_rename_detection(mut self, detect: bool, threshold: f64) -> Self {
self.detect_renames = detect;
self.rename_threshold = threshold;
self
}
pub fn with_rollback(mut self, enable: bool) -> Self {
self.enable_rollback = enable;
self
}
pub fn with_batch_patterns(mut self, patterns: Vec<BatchPattern>) -> Self {
self.batch_patterns = patterns;
self
}
pub fn with_dialects(mut self, source: Option<DialectKind>, target: Option<DialectKind>) -> Self {
self.source_dialect = source;
self.target_dialect = target;
self
}
pub fn with_compatibility_threshold(mut self, threshold: f64) -> Self {
self.compatibility_threshold = threshold;
self
}
pub fn with_permissions(mut self, source: Vec<PermissionInfo>, target: Vec<PermissionInfo>) -> Self {
self.source_permissions = source;
self.target_permissions = target;
self
}
pub fn with_shard_strategy(mut self, strategy: ShardStrategy) -> Self {
self.shard_strategy = Some(strategy);
self
}
pub fn with_resource_constraint(mut self, constraint: ResourceConstraint) -> Self {
self.resource_constraint = Some(constraint);
self
}
pub fn with_field_mappings(mut self, mappings: Vec<FieldMapping>) -> Self {
self.field_mappings = mappings;
self
}
}
pub fn prepare_schema_diff(options: SchemaDiffPreparationOptions) -> SchemaDiffPreparation {
if !options.field_mappings.is_empty() {
log::info!("prepare_schema_diff field_mappings:");
for m in &options.field_mappings {
log::info!(
" {} -> {} (strategy={:?}, custom={:?})",
m.source_type,
m.target_type,
m.param_strategy,
m.custom_params
);
}
log::info!(" source_dialect={:?} target_dialect={:?}", options.source_dialect, options.target_dialect);
}
let dialect_str = options.source_dialect.map(|d| d.label().to_string()).unwrap_or_else(|| "generic".to_string());
let options = AstTransmitFilter::filter_diff_preparation_options(options, &dialect_str);
let dep_graph = DependencyGraph::build(&options.source_details, &options.source_tables);
let mut diffs = if let Some(ref strategy) = options.shard_strategy {
shard_diff(&options, strategy)
} else {
diff_schema(&options)
};
let rename_candidates = if options.detect_renames && options.detect_table_renames {
let removed: Vec<String> = diffs.iter().filter(|d| d.diff_type == "removed").map(|d| d.name.clone()).collect();
let added: Vec<String> = diffs.iter().filter(|d| d.diff_type == "added").map(|d| d.name.clone()).collect();
let candidates = detect_renames(
&removed,
&added,
&options.source_details,
&options.target_details,
options.rename_threshold,
);
let target_renamed: HashSet<&str> = candidates.iter().map(|r| r.target_name.as_str()).collect();
let source_renamed: HashSet<&str> = candidates.iter().map(|r| r.source_name.as_str()).collect();
diffs.retain(|d| {
!((d.diff_type == "removed" && target_renamed.contains(d.name.as_str()))
|| (d.diff_type == "added" && source_renamed.contains(d.name.as_str())))
});
for c in &candidates {
let source_detail = options.source_details.iter().find(|d| d.name == c.source_name);
let target_detail = options.target_details.iter().find(|d| d.name == c.target_name);
diffs.push(TableDiff {
diff_type: "renamed".to_string(),
object_type: Some("table".to_string()),
name: c.source_name.clone(),
columns: None,
indexes: None,
foreign_keys: None,
triggers: None,
ddl: source_detail.and_then(|d| d.ddl.clone()),
target_ddl: target_detail.and_then(|d| d.ddl.clone()),
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
});
}
candidates
} else {
Vec::new()
};
let compatibility_warnings = if options.source_dialect.is_some() || options.target_dialect.is_some() {
let src_dialect = options.source_dialect.unwrap_or(DialectKind::Mysql);
let tgt_dialect = options.target_dialect.unwrap_or(DialectKind::Mysql);
let mut all_warnings = Vec::new();
for diff in &diffs {
if diff.diff_type == "modified" {
if let Some(source_detail) = options.source_details.iter().find(|d| d.name == diff.name) {
if let Some(target_detail) = options.target_details.iter().find(|d| d.name == diff.name) {
let (_, warnings) = diff_columns_with_compatibility(
&source_detail.columns,
&target_detail.columns,
options.ignore_comments,
options.compare_column_order,
src_dialect,
tgt_dialect,
options.compatibility_threshold,
&options.field_mappings,
);
all_warnings.extend(warnings);
}
}
}
}
all_warnings
} else {
Vec::new()
};
let rollback_graph = if options.enable_rollback {
let mut graph = RollbackGraph::from_forward_diffs(&diffs, &rename_candidates, &dep_graph);
let _ = graph.validate_consistency();
Some(graph)
} else {
None
};
let function_diffs = diff_functions(&options.source_functions, &options.target_functions);
let sequence_diffs = diff_sequences(&options.source_sequences, &options.target_sequences);
let rule_diffs = diff_rules(&options.source_rules, &options.target_rules);
let owner_diffs = diff_owners(&options.source_owners, &options.target_owners);
for diff in &mut diffs {
let (sync_sql, _) = generate_schema_sync_sql_inner(
std::slice::from_ref(diff),
&[],
&[],
&[],
&[],
options.database_type,
options.target_schema.as_deref(),
options.cascade_delete,
options.source_dialect,
&options.field_mappings,
);
if !sync_sql.is_empty() {
diff.sync_sql = Some(sync_sql);
}
}
let (sync_sql, _) = generate_schema_sync_sql_inner(
&diffs,
&function_diffs,
&sequence_diffs,
&rule_diffs,
&owner_diffs,
options.database_type,
options.target_schema.as_deref(),
options.cascade_delete,
options.source_dialect,
&options.field_mappings,
);
let (rollback_sync_sql, missing_rollback_objects) = match &rollback_graph {
Some(graph) => {
let (sql, missing) = generate_rollback_sync_sql_with_missing(
graph,
options.database_type,
options.target_schema.as_deref(),
options.cascade_delete,
);
(Some(sql), missing)
}
None => (None, Vec::new()),
};
let rollback_completeness = if missing_rollback_objects.is_empty() {
RollbackCompleteness::Complete
} else {
RollbackCompleteness::Incomplete
};
let permission_diffs = if !options.source_permissions.is_empty() || !options.target_permissions.is_empty() {
diff_permissions(&options.source_permissions, &options.target_permissions)
} else {
Vec::new()
};
let permission_sync_sql = if !permission_diffs.is_empty() {
Some(generate_permission_sync_sql(&permission_diffs, options.database_type, options.target_schema.as_deref()))
} else {
None
};
SchemaDiffPreparation {
diffs,
function_diffs,
sequence_diffs,
rule_diffs,
owner_diffs,
sync_sql,
rollback_sync_sql,
rollback_completeness,
missing_rollback_objects,
rename_candidates,
rollback_graph,
compatibility_warnings,
permission_diffs,
permission_sync_sql,
dependency_graph: Some(dep_graph),
}
}
fn diff_schema(options: &SchemaDiffPreparationOptions) -> Vec<TableDiff> {
let source_details: HashMap<&str, &TableSchemaDetail> =
options.source_details.iter().map(|detail| (detail.name.as_str(), detail)).collect();
let target_details: HashMap<&str, &TableSchemaDetail> =
options.target_details.iter().map(|detail| (detail.name.as_str(), detail)).collect();
let source_table_comments: HashMap<&str, Option<String>> =
options.source_tables.iter().map(|table| (table.name.as_str(), table.comment.clone())).collect();
let target_table_comments: HashMap<&str, Option<String>> =
options.target_tables.iter().map(|table| (table.name.as_str(), table.comment.clone())).collect();
let source_table_names: Vec<String> = options
.source_tables
.iter()
.filter(|table| !table.table_type.contains("VIEW"))
.map(|table| table.name.clone())
.collect();
let target_table_names: Vec<String> = options
.target_tables
.iter()
.filter(|table| !table.table_type.contains("VIEW"))
.map(|table| table.name.clone())
.collect();
let source_view_names: Vec<String> = options
.source_tables
.iter()
.filter(|table| table.table_type.contains("VIEW"))
.map(|table| table.name.clone())
.collect();
let target_view_names: Vec<String> = options
.target_tables
.iter()
.filter(|table| table.table_type.contains("VIEW"))
.map(|table| table.name.clone())
.collect();
let (added, removed, common) = diff_names(&source_table_names, &target_table_names);
let (added_views, removed_views, common_views) = diff_names(&source_view_names, &target_view_names);
let mut result = Vec::new();
for name in added {
let source_detail = source_details.get(name.as_str());
result.push(TableDiff {
diff_type: "added".to_string(),
object_type: Some("table".to_string()),
name,
ddl: source_detail.and_then(|detail| detail.ddl.clone()),
target_ddl: None,
columns: source_detail.map(|detail| {
detail
.columns
.iter()
.enumerate()
.map(|(index, c)| ColumnDiff {
diff_type: "added".to_string(),
name: c.name.clone(),
source: Some(c.clone()),
target: None,
changes: vec![],
add_position: Some(column_add_position(&detail.columns, index)),
})
.collect()
}),
indexes: source_detail.map(|detail| {
detail
.indexes
.iter()
.map(|i| IndexDiff {
diff_type: "added".to_string(),
name: i.name.clone(),
source: Some(i.clone()),
target: None,
changes: vec![],
})
.collect()
}),
foreign_keys: source_detail.map(|detail| {
detail
.foreign_keys
.iter()
.map(|fk| ForeignKeyDiff {
diff_type: "added".to_string(),
name: fk.name.clone(),
source: Some(fk.clone()),
target: None,
changes: vec![],
})
.collect()
}),
triggers: source_detail.and_then(|detail| {
if detail.triggers.is_empty() {
None
} else {
Some(
detail
.triggers
.iter()
.map(|t| TriggerDiff {
diff_type: "added".to_string(),
name: t.name.clone(),
source: Some(t.clone()),
target: None,
changes: vec![],
})
.collect(),
)
}
}),
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
});
}
for name in removed {
let name_clone = name.clone();
let target_detail = target_details.get(name_clone.as_str()).copied();
result.push(TableDiff {
diff_type: "removed".to_string(),
object_type: Some("table".to_string()),
name,
columns: target_detail.map(|detail| {
detail
.columns
.iter()
.enumerate()
.map(|(index, column)| ColumnDiff {
diff_type: "removed".to_string(),
name: column.name.clone(),
source: None,
target: Some(column.clone()),
changes: vec![],
add_position: Some(column_add_position(&detail.columns, index)),
})
.collect()
}),
indexes: target_detail.map(|detail| {
detail
.indexes
.iter()
.map(|index| IndexDiff {
diff_type: "removed".to_string(),
name: index.name.clone(),
source: None,
target: Some(index.clone()),
changes: vec![],
})
.collect()
}),
foreign_keys: target_detail.map(|detail| {
detail
.foreign_keys
.iter()
.map(|foreign_key| ForeignKeyDiff {
diff_type: "removed".to_string(),
name: foreign_key.name.clone(),
source: None,
target: Some(foreign_key.clone()),
changes: vec![],
})
.collect()
}),
triggers: target_detail.map(|detail| {
detail
.triggers
.iter()
.map(|trigger| TriggerDiff {
diff_type: "removed".to_string(),
name: trigger.name.clone(),
source: None,
target: Some(trigger.clone()),
changes: vec![],
})
.collect()
}),
ddl: None,
target_ddl: target_detail.and_then(|detail| detail.ddl.clone()),
source_table_comment: None,
target_table_comment: target_table_comments.get(name_clone.as_str()).cloned(),
sync_sql: None,
});
}
for name in added_views {
let name_clone = name.clone();
result.push(TableDiff {
diff_type: "added".to_string(),
object_type: Some("view".to_string()),
name,
columns: None,
indexes: None,
foreign_keys: None,
triggers: None,
ddl: source_details.get(name_clone.as_str()).and_then(|detail| detail.ddl.clone()),
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
});
}
for name in removed_views {
let name_clone = name.clone();
result.push(TableDiff {
diff_type: "removed".to_string(),
object_type: Some("view".to_string()),
name,
columns: None,
indexes: None,
foreign_keys: None,
triggers: None,
ddl: None,
target_ddl: target_details.get(name_clone.as_str()).and_then(|detail| detail.ddl.clone()),
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
});
}
for name in common_views {
let Some(source_ddl) = source_details.get(name.as_str()).and_then(|detail| detail.ddl.as_ref()) else {
continue;
};
let Some(target_ddl) = target_details.get(name.as_str()).and_then(|detail| detail.ddl.as_ref()) else {
continue;
};
if !mysql_view_definitions_differ(source_ddl, target_ddl, options.source_dialect, options.target_dialect) {
continue;
}
result.push(TableDiff {
diff_type: "modified".to_string(),
object_type: Some("view".to_string()),
name,
columns: None,
indexes: None,
foreign_keys: None,
triggers: None,
ddl: Some(source_ddl.clone()),
target_ddl: Some(target_ddl.clone()),
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
});
}
for name in common {
let Some(source) = source_details.get(name.as_str()) else { continue };
let Some(target) = target_details.get(name.as_str()) else { continue };
let column_diffs = diff_columns_with_options(
&source.columns,
&target.columns,
options.ignore_comments,
options.compare_column_order,
options.detect_renames,
options.rename_threshold,
);
let index_diffs = diff_indexes(&source.indexes, &target.indexes);
let foreign_key_diffs = diff_foreign_keys(&source.foreign_keys, &target.foreign_keys);
let trigger_diffs = diff_triggers(&source.triggers, &target.triggers);
let source_comment = source_table_comments.get(name.as_str()).cloned().unwrap_or(None);
let target_comment = target_table_comments.get(name.as_str()).cloned().unwrap_or(None);
let comment_changed = !options.ignore_comments
&& source_comment.clone().unwrap_or_default() != target_comment.clone().unwrap_or_default();
let has_diff = !column_diffs.is_empty()
|| !index_diffs.is_empty()
|| !foreign_key_diffs.is_empty()
|| !trigger_diffs.is_empty()
|| comment_changed;
let name_clone = name.clone();
result.push(TableDiff {
diff_type: if has_diff { "modified".to_string() } else { "none".to_string() },
object_type: Some("table".to_string()),
name,
columns: if has_diff { (!column_diffs.is_empty()).then_some(column_diffs) } else { None },
indexes: if has_diff { (!index_diffs.is_empty()).then_some(index_diffs) } else { None },
foreign_keys: if has_diff { (!foreign_key_diffs.is_empty()).then_some(foreign_key_diffs) } else { None },
triggers: if has_diff { (!trigger_diffs.is_empty()).then_some(trigger_diffs) } else { None },
ddl: source_details.get(name_clone.as_str()).and_then(|detail| detail.ddl.clone()),
target_ddl: target_details.get(name_clone.as_str()).and_then(|detail| detail.ddl.clone()),
source_table_comment: if has_diff { comment_changed.then_some(source_comment) } else { None },
target_table_comment: if has_diff { comment_changed.then_some(target_comment) } else { None },
sync_sql: None,
});
}
result.retain(|diff| diff.diff_type != "none");
result
}
fn diff_names(source: &[String], target: &[String]) -> (Vec<String>, Vec<String>, Vec<String>) {
let source_set: HashSet<&str> = source.iter().map(String::as_str).collect();
let target_set: HashSet<&str> = target.iter().map(String::as_str).collect();
(
source.iter().filter(|name| !target_set.contains(name.as_str())).cloned().collect(),
target.iter().filter(|name| !source_set.contains(name.as_str())).cloned().collect(),
source.iter().filter(|name| target_set.contains(name.as_str())).cloned().collect(),
)
}
fn mysql_view_definitions_differ(
source_ddl: &str,
target_ddl: &str,
source_dialect: Option<DialectKind>,
target_dialect: Option<DialectKind>,
) -> bool {
if source_dialect != Some(DialectKind::Mysql) || target_dialect != Some(DialectKind::Mysql) {
return false;
}
normalize_mysql_view_ddl(source_ddl) != normalize_mysql_view_ddl(target_ddl)
}
#[derive(Clone, Copy, PartialEq, Eq)]
enum MysqlViewTokenKind {
Atom,
Symbol,
}
fn normalize_mysql_view_ddl(ddl: &str) -> String {
let ddl = strip_mysql_view_definer(ddl);
let schema = mysql_view_schema(&ddl);
let mut normalized = String::with_capacity(ddl.len());
let mut previous = None;
let mut pending_whitespace = false;
let bytes = ddl.as_bytes();
let mut index = 0;
while index < bytes.len() {
if bytes[index].is_ascii_whitespace() {
pending_whitespace = true;
index += 1;
continue;
}
let (end, kind, replacement) = match bytes[index] {
b'\'' | b'"' => {
let end = mysql_quoted_token_end(&ddl, index);
(end, MysqlViewTokenKind::Atom, None)
}
b'`' => {
let end = mysql_quoted_token_end(&ddl, index);
let identifier = decode_mysql_quoted_identifier(&ddl[index..end]);
let is_schema_qualifier =
schema.as_deref() == Some(identifier.as_str()) && ddl[end..].trim_start().starts_with('.');
(end, MysqlViewTokenKind::Atom, is_schema_qualifier.then_some("`__dbx_schema__`"))
}
b'#' => {
let end = ddl[index..].find('\n').map_or(bytes.len(), |offset| index + offset);
(end, MysqlViewTokenKind::Atom, None)
}
b'-' if bytes.get(index + 1) == Some(&b'-')
&& bytes.get(index + 2).is_some_and(|next| next.is_ascii_whitespace()) =>
{
let end = ddl[index..].find('\n').map_or(bytes.len(), |offset| index + offset);
(end, MysqlViewTokenKind::Atom, None)
}
b'/' if bytes.get(index + 1) == Some(&b'*') => {
let end = ddl[index + 2..].find("*/").map_or(bytes.len(), |offset| index + 2 + offset + 2);
(end, MysqlViewTokenKind::Atom, None)
}
byte if mysql_view_symbol(byte) => (index + 1, MysqlViewTokenKind::Symbol, None),
_ => {
let mut end = index + 1;
while end < bytes.len()
&& !bytes[end].is_ascii_whitespace()
&& !matches!(bytes[end], b'\'' | b'"' | b'`' | b'#')
&& !mysql_view_symbol(bytes[end])
{
end += 1;
}
(end, MysqlViewTokenKind::Atom, None)
}
};
if pending_whitespace && previous == Some(kind) {
normalized.push(' ');
}
normalized.push_str(replacement.unwrap_or(&ddl[index..end]));
previous = Some(kind);
pending_whitespace = false;
index = end;
}
normalized
}
fn mysql_view_symbol(byte: u8) -> bool {
matches!(
byte,
b'(' | b')'
| b'['
| b']'
| b'{'
| b'}'
| b','
| b'.'
| b';'
| b'+'
| b'-'
| b'*'
| b'/'
| b'%'
| b'<'
| b'>'
| b'='
| b'!'
| b'|'
| b'&'
| b'^'
| b'~'
| b'?'
| b':'
| b'@'
)
}
fn mysql_view_schema(ddl: &str) -> Option<String> {
let view = find_mysql_header_keyword(ddl, "VIEW", ddl.len())?;
let mut index = skip_ascii_whitespace(ddl, view + "VIEW".len());
let (identifier, end) = parse_mysql_identifier(ddl, index)?;
index = skip_ascii_whitespace(ddl, end);
(ddl.as_bytes().get(index) == Some(&b'.')).then_some(identifier)
}
fn strip_mysql_view_definer(ddl: &str) -> String {
let Some(view) = find_mysql_header_keyword(ddl, "VIEW", ddl.len()) else {
return ddl.to_string();
};
let Some(definer) = find_mysql_header_keyword(ddl, "DEFINER", view) else {
return ddl.to_string();
};
let mut index = skip_ascii_whitespace(ddl, definer + "DEFINER".len());
if ddl.as_bytes().get(index) != Some(&b'=') {
return ddl.to_string();
}
index = skip_ascii_whitespace(ddl, index + 1);
let Some(mut end) = parse_mysql_definer_principal(ddl, index) else {
return ddl.to_string();
};
end = skip_ascii_whitespace(ddl, end);
if ddl.as_bytes().get(end) == Some(&b'@') {
end = skip_ascii_whitespace(ddl, end + 1);
let Some(host_end) = parse_mysql_definer_principal(ddl, end) else {
return ddl.to_string();
};
end = host_end;
} else if ddl[index..end].eq_ignore_ascii_case("CURRENT_USER") {
let open = skip_ascii_whitespace(ddl, end);
if ddl.as_bytes().get(open) == Some(&b'(') {
let close = skip_ascii_whitespace(ddl, open + 1);
if ddl.as_bytes().get(close) == Some(&b')') {
end = close + 1;
}
}
} else {
return ddl.to_string();
}
end = skip_ascii_whitespace(ddl, end);
let mut stripped = String::with_capacity(ddl.len() - (end - definer));
stripped.push_str(&ddl[..definer]);
stripped.push_str(&ddl[end..]);
stripped
}
fn parse_mysql_definer_principal(ddl: &str, index: usize) -> Option<usize> {
match *ddl.as_bytes().get(index)? {
b'`' | b'\'' | b'"' => Some(mysql_quoted_token_end(ddl, index)),
_ => {
let mut end = index;
while let Some(byte) = ddl.as_bytes().get(end) {
if byte.is_ascii_whitespace() || matches!(byte, b'@' | b'(' | b')') {
break;
}
end += 1;
}
(end > index).then_some(end)
}
}
}
fn parse_mysql_identifier(ddl: &str, index: usize) -> Option<(String, usize)> {
if ddl.as_bytes().get(index) == Some(&b'`') {
let end = mysql_quoted_token_end(ddl, index);
return Some((decode_mysql_quoted_identifier(&ddl[index..end]), end));
}
let mut end = index;
while let Some(byte) = ddl.as_bytes().get(end) {
if byte.is_ascii_whitespace() || mysql_view_symbol(*byte) {
break;
}
end += 1;
}
(end > index).then(|| (ddl[index..end].to_string(), end))
}
fn decode_mysql_quoted_identifier(identifier: &str) -> String {
identifier.strip_prefix('`').and_then(|value| value.strip_suffix('`')).unwrap_or(identifier).replace("``", "`")
}
fn find_mysql_header_keyword(ddl: &str, keyword: &str, limit: usize) -> Option<usize> {
let bytes = ddl.as_bytes();
let mut index = 0;
while index < limit {
match bytes[index] {
b'\'' | b'"' | b'`' => {
index = mysql_quoted_token_end(ddl, index);
}
byte if byte.is_ascii_alphabetic() || byte == b'_' => {
let start = index;
index += 1;
while index < limit && (bytes[index].is_ascii_alphanumeric() || matches!(bytes[index], b'_' | b'$')) {
index += 1;
}
if ddl[start..index].eq_ignore_ascii_case(keyword) {
return Some(start);
}
}
_ => index += 1,
}
}
None
}
fn mysql_quoted_token_end(ddl: &str, start: usize) -> usize {
let bytes = ddl.as_bytes();
let quote = bytes[start];
let mut index = start + 1;
while index < bytes.len() {
if bytes[index] == b'\\' && quote != b'`' {
index = (index + 2).min(bytes.len());
continue;
}
if bytes[index] == quote {
if bytes.get(index + 1) == Some(&quote) {
index += 2;
continue;
}
return index + 1;
}
index += 1;
}
bytes.len()
}
fn skip_ascii_whitespace(input: &str, mut index: usize) -> usize {
while input.as_bytes().get(index).is_some_and(|byte| byte.is_ascii_whitespace()) {
index += 1;
}
index
}
pub fn diff_columns(source: &[ColumnInfo], target: &[ColumnInfo]) -> Vec<ColumnDiff> {
diff_columns_with_options(source, target, false, false, false, 0.5)
}
fn column_type_similarity_score(source_type: &str, target_type: &str) -> f64 {
let s = ColumnType::parse(source_type).base_type.to_ascii_lowercase();
let t = ColumnType::parse(target_type).base_type.to_ascii_lowercase();
if s == t {
return 1.0;
}
let exact_matches = [
("int", "integer"),
("integer", "int"),
("float", "real"),
("real", "float"),
("double", "double precision"),
("double precision", "double"),
("bool", "boolean"),
("boolean", "bool"),
("timestamp", "datetime"),
("datetime", "timestamp"),
];
if exact_matches.contains(&(s.as_str(), t.as_str())) {
return 1.0;
}
let integer_family = ["tinyint", "smallint", "mediumint", "int", "integer", "bigint", "serial", "bigserial"];
let text_family = ["char", "varchar", "text", "tinytext", "mediumtext", "longtext", "clob", "nclob"];
if integer_family.contains(&s.as_str()) && integer_family.contains(&t.as_str()) {
return 0.8;
}
if text_family.contains(&s.as_str()) && text_family.contains(&t.as_str()) {
return 0.8;
}
0.0
}
fn diff_columns_with_options(
source: &[ColumnInfo],
target: &[ColumnInfo],
ignore_comments: bool,
compare_column_order: bool,
detect_renames: bool,
rename_threshold: f64,
) -> Vec<ColumnDiff> {
let mut diffs = Vec::new();
let target_map: HashMap<&str, &ColumnInfo> = target.iter().map(|column| (column.name.as_str(), column)).collect();
let source_map: HashMap<&str, &ColumnInfo> = source.iter().map(|column| (column.name.as_str(), column)).collect();
let target_position_map: HashMap<&str, usize> =
target.iter().enumerate().map(|(index, column)| (column.name.as_str(), index)).collect();
let can_compare_order = compare_column_order
&& source.len() == target.len()
&& source.iter().all(|column| target_map.contains_key(column.name.as_str()));
for (source_index, source_column) in source.iter().enumerate() {
if let Some(target_column) = target_map.get(source_column.name.as_str()) {
let mut changes = Vec::new();
if source_column.data_type.to_lowercase() != target_column.data_type.to_lowercase() {
changes.push(format!("type: {} → {}", target_column.data_type, source_column.data_type));
}
if source_column.is_nullable != target_column.is_nullable {
changes.push(format!(
"nullable: {} → {}",
if target_column.is_nullable { "YES" } else { "NO" },
if source_column.is_nullable { "YES" } else { "NO" }
));
}
if source_column.column_default.as_deref().unwrap_or_default()
!= target_column.column_default.as_deref().unwrap_or_default()
{
changes.push(format!(
"default: {} → {}",
target_column.column_default.as_deref().unwrap_or("NULL"),
source_column.column_default.as_deref().unwrap_or("NULL")
));
}
if !ignore_comments
&& source_column.comment.as_deref().unwrap_or_default()
!= target_column.comment.as_deref().unwrap_or_default()
{
changes.push(format!(
"comment: {} → {}",
target_column.comment.as_deref().unwrap_or_default(),
source_column.comment.as_deref().unwrap_or_default()
));
}
if can_compare_order {
if let Some(target_index) = target_position_map.get(source_column.name.as_str()) {
if source_index != *target_index {
changes.push(format!("order: {} → {}", *target_index + 1, source_index + 1));
}
}
}
if !changes.is_empty() {
diffs.push(ColumnDiff {
diff_type: "modified".to_string(),
name: source_column.name.clone(),
source: Some(source_column.clone()),
target: Some((*target_column).clone()),
changes,
add_position: None,
});
}
} else {
diffs.push(ColumnDiff {
diff_type: "added".to_string(),
name: source_column.name.clone(),
source: Some(source_column.clone()),
target: None,
changes: Vec::new(),
add_position: Some(column_add_position(source, source_index)),
});
}
}
for (target_index, target_column) in target.iter().enumerate() {
if !source_map.contains_key(target_column.name.as_str()) {
diffs.push(ColumnDiff {
diff_type: "removed".to_string(),
name: target_column.name.clone(),
source: None,
target: Some(target_column.clone()),
changes: Vec::new(),
add_position: Some(column_add_position(target, target_index)),
});
}
}
if detect_renames && rename_threshold > 0.0 {
let removed_indices: Vec<usize> =
diffs.iter().enumerate().filter(|(_, d)| d.diff_type == "removed").map(|(i, _)| i).collect();
let added_indices: Vec<usize> =
diffs.iter().enumerate().filter(|(_, d)| d.diff_type == "added").map(|(i, _)| i).collect();
let mut matched_added: HashSet<usize> = HashSet::new();
let mut matched_removed: HashSet<usize> = HashSet::new();
let mut rename_pairs: Vec<(usize, usize, f64)> = Vec::new();
for &ri in &removed_indices {
if let Some(removed_col) = &diffs[ri].target {
let mut best_score = 0.0_f64;
let mut best_ai = None;
for &ai in &added_indices {
if matched_added.contains(&ai) {
continue;
}
if let Some(added_col) = &diffs[ai].source {
let type_score = column_type_similarity_score(&removed_col.data_type, &added_col.data_type);
if type_score < rename_threshold {
continue;
}
let mut score = type_score;
if removed_col.is_nullable == added_col.is_nullable {
score *= 1.0;
} else {
score *= 0.8;
}
if score > best_score {
best_score = score;
best_ai = Some(ai);
}
}
}
if let Some(ai) = best_ai {
rename_pairs.push((ri, ai, best_score));
matched_removed.insert(ri);
matched_added.insert(ai);
}
}
}
for (ri, ai, _score) in &rename_pairs {
let old_name = diffs[*ri].name.clone();
let old_col = diffs[*ri].target.clone().unwrap();
let new_col = diffs[*ai].source.clone().unwrap();
let new_name = new_col.name.clone();
diffs[*ri] = ColumnDiff {
diff_type: "renamed".to_string(),
name: new_name.clone(),
source: Some(new_col),
target: Some(old_col),
changes: vec![format!("{} → {}", old_name, new_name)],
add_position: None,
};
diffs[*ai] = ColumnDiff {
diff_type: "_matched_rename".to_string(),
name: String::new(),
source: None,
target: None,
changes: Vec::new(),
add_position: None,
};
}
diffs.retain(|d| d.diff_type != "_matched_rename");
}
diffs
}
fn column_add_position(columns: &[ColumnInfo], index: usize) -> ColumnAddPosition {
if index == 0 {
ColumnAddPosition::First
} else {
ColumnAddPosition::After(columns[index - 1].name.clone())
}
}
pub fn diff_indexes(source: &[IndexInfo], target: &[IndexInfo]) -> Vec<IndexDiff> {
let mut diffs = Vec::new();
let target_map: HashMap<&str, &IndexInfo> = target.iter().map(|index| (index.name.as_str(), index)).collect();
let source_map: HashMap<&str, &IndexInfo> = source.iter().map(|index| (index.name.as_str(), index)).collect();
for source_index in source {
if source_index.is_primary {
continue;
}
let Some(target_index) = target_map.get(source_index.name.as_str()) else {
diffs.push(IndexDiff {
diff_type: "added".to_string(),
name: source_index.name.clone(),
source: Some(source_index.clone()),
target: None,
changes: Vec::new(),
});
continue;
};
let mut changes = Vec::new();
if source_index.is_unique != target_index.is_unique {
changes.push(format!(
"unique: {} → {}",
if target_index.is_unique { "YES" } else { "NO" },
if source_index.is_unique { "YES" } else { "NO" }
));
}
if source_index.columns.join(",") != target_index.columns.join(",") {
changes.push(format!("columns: {} → {}", target_index.columns.join(", "), source_index.columns.join(", ")));
}
if source_index.index_type.as_deref().unwrap_or_default()
!= target_index.index_type.as_deref().unwrap_or_default()
{
changes.push(format!(
"type: {} → {}",
target_index.index_type.as_deref().unwrap_or("default"),
source_index.index_type.as_deref().unwrap_or("default")
));
}
if source_index.filter.as_deref().unwrap_or_default() != target_index.filter.as_deref().unwrap_or_default() {
changes.push(format!(
"filter: {} → {}",
target_index.filter.as_deref().unwrap_or("none"),
source_index.filter.as_deref().unwrap_or("none")
));
}
let source_included = source_index.included_columns.clone().unwrap_or_default();
let target_included = target_index.included_columns.clone().unwrap_or_default();
if source_included.join(",") != target_included.join(",") {
changes.push(format!(
"include: {} → {}",
if target_included.is_empty() { "none".to_string() } else { target_included.join(", ") },
if source_included.is_empty() { "none".to_string() } else { source_included.join(", ") }
));
}
if !changes.is_empty() {
diffs.push(IndexDiff {
diff_type: "modified".to_string(),
name: source_index.name.clone(),
source: Some(source_index.clone()),
target: Some((*target_index).clone()),
changes,
});
}
}
for target_index in target {
if target_index.is_primary {
continue;
}
if !source_map.contains_key(target_index.name.as_str()) {
diffs.push(IndexDiff {
diff_type: "removed".to_string(),
name: target_index.name.clone(),
source: None,
target: Some(target_index.clone()),
changes: Vec::new(),
});
}
}
diffs
}
fn normalized_foreign_key_action(action: Option<&str>) -> Option<String> {
action
.map(|value| value.split_whitespace().collect::<Vec<_>>().join(" ").to_ascii_uppercase())
.filter(|value| !value.is_empty())
}
pub fn diff_foreign_keys(source: &[ForeignKeyInfo], target: &[ForeignKeyInfo]) -> Vec<ForeignKeyDiff> {
let mut diffs = Vec::new();
let target_map: HashMap<&str, &ForeignKeyInfo> = target.iter().map(|fk| (fk.name.as_str(), fk)).collect();
let source_map: HashMap<&str, &ForeignKeyInfo> = source.iter().map(|fk| (fk.name.as_str(), fk)).collect();
for source_fk in source {
let Some(target_fk) = target_map.get(source_fk.name.as_str()) else {
diffs.push(ForeignKeyDiff {
diff_type: "added".to_string(),
name: source_fk.name.clone(),
source: Some(source_fk.clone()),
target: None,
changes: Vec::new(),
});
continue;
};
let mut changes = Vec::new();
if source_fk.column != target_fk.column {
changes.push(format!("column: {} → {}", target_fk.column, source_fk.column));
}
if source_fk.ref_table != target_fk.ref_table {
changes.push(format!("ref table: {} → {}", target_fk.ref_table, source_fk.ref_table));
}
if source_fk.ref_schema != target_fk.ref_schema {
changes.push(format!(
"ref schema: {} → {}",
target_fk.ref_schema.as_deref().unwrap_or(""),
source_fk.ref_schema.as_deref().unwrap_or("")
));
}
if source_fk.ref_column != target_fk.ref_column {
changes.push(format!("ref column: {} → {}", target_fk.ref_column, source_fk.ref_column));
}
let source_on_delete = normalized_foreign_key_action(source_fk.on_delete.as_deref());
let target_on_delete = normalized_foreign_key_action(target_fk.on_delete.as_deref());
if source_on_delete != target_on_delete {
changes.push(format!(
"delete: {} → {}",
target_on_delete.as_deref().unwrap_or(""),
source_on_delete.as_deref().unwrap_or("")
));
}
let source_on_update = normalized_foreign_key_action(source_fk.on_update.as_deref());
let target_on_update = normalized_foreign_key_action(target_fk.on_update.as_deref());
if source_on_update != target_on_update {
changes.push(format!(
"update: {} → {}",
target_on_update.as_deref().unwrap_or(""),
source_on_update.as_deref().unwrap_or("")
));
}
if !changes.is_empty() {
diffs.push(ForeignKeyDiff {
diff_type: "modified".to_string(),
name: source_fk.name.clone(),
source: Some(source_fk.clone()),
target: Some((*target_fk).clone()),
changes,
});
}
}
for target_fk in target {
if !source_map.contains_key(target_fk.name.as_str()) {
diffs.push(ForeignKeyDiff {
diff_type: "removed".to_string(),
name: target_fk.name.clone(),
source: None,
target: Some(target_fk.clone()),
changes: Vec::new(),
});
}
}
diffs
}
pub fn diff_triggers(source: &[TriggerInfo], target: &[TriggerInfo]) -> Vec<TriggerDiff> {
let mut diffs = Vec::new();
let target_map: HashMap<&str, &TriggerInfo> =
target.iter().map(|trigger| (trigger.name.as_str(), trigger)).collect();
let source_map: HashMap<&str, &TriggerInfo> =
source.iter().map(|trigger| (trigger.name.as_str(), trigger)).collect();
for source_trigger in source {
let Some(target_trigger) = target_map.get(source_trigger.name.as_str()) else {
diffs.push(TriggerDiff {
diff_type: "added".to_string(),
name: source_trigger.name.clone(),
source: Some(source_trigger.clone()),
target: None,
changes: Vec::new(),
});
continue;
};
let mut changes = Vec::new();
if source_trigger.event != target_trigger.event {
changes.push(format!("event: {} → {}", target_trigger.event, source_trigger.event));
}
if source_trigger.timing != target_trigger.timing {
changes.push(format!("timing: {} → {}", target_trigger.timing, source_trigger.timing));
}
if !changes.is_empty() {
diffs.push(TriggerDiff {
diff_type: "modified".to_string(),
name: source_trigger.name.clone(),
source: Some(source_trigger.clone()),
target: Some((*target_trigger).clone()),
changes,
});
}
}
for target_trigger in target {
if !source_map.contains_key(target_trigger.name.as_str()) {
diffs.push(TriggerDiff {
diff_type: "removed".to_string(),
name: target_trigger.name.clone(),
source: None,
target: Some(target_trigger.clone()),
changes: Vec::new(),
});
}
}
diffs
}
/// Normalize a function definition for comparison by:
/// - Converting CRLF to LF
/// - Collapsing all whitespace (tabs, multiple spaces) to single spaces
/// - Trimming each line and rejoining
pub(crate) fn normalize_definition(def: &str) -> String {
def.replace("\r\n", "\n")
.split('\n')
.map(|line| line.split_whitespace().collect::<Vec<_>>().join(" "))
.collect::<Vec<_>>()
.join("\n")
}
pub fn diff_functions(source: &[FunctionInfo], target: &[FunctionInfo]) -> Vec<FunctionDiff> {
let mut diffs = Vec::new();
// Use (name, arguments) as key to support PostgreSQL function overloading
let target_map: HashMap<(&str, &str), &FunctionInfo> =
target.iter().map(|f| ((f.name.as_str(), f.arguments.as_str()), f)).collect();
let source_map: HashMap<(&str, &str), &FunctionInfo> =
source.iter().map(|f| ((f.name.as_str(), f.arguments.as_str()), f)).collect();
for source_fn in source {
let key = (source_fn.name.as_str(), source_fn.arguments.as_str());
let Some(target_fn) = target_map.get(&key) else {
diffs.push(FunctionDiff {
diff_type: "added".to_string(),
name: source_fn.name.clone(),
source: Some(source_fn.clone()),
target: None,
changes: Vec::new(),
});
continue;
};
let mut changes = Vec::new();
if source_fn.function_type != target_fn.function_type {
changes.push(format!("type: {} → {}", target_fn.function_type, source_fn.function_type));
}
if source_fn.data_type != target_fn.data_type {
changes.push(format!("return type: {} → {}", target_fn.data_type, source_fn.data_type));
}
if normalize_definition(&source_fn.definition) != normalize_definition(&target_fn.definition) {
changes.push("definition changed".to_string());
}
if !changes.is_empty() {
diffs.push(FunctionDiff {
diff_type: "modified".to_string(),
name: source_fn.name.clone(),
source: Some(source_fn.clone()),
target: Some((*target_fn).clone()),
changes,
});
}
}
for target_fn in target {
let key = (target_fn.name.as_str(), target_fn.arguments.as_str());
if !source_map.contains_key(&key) {
diffs.push(FunctionDiff {
diff_type: "removed".to_string(),
name: target_fn.name.clone(),
source: None,
target: Some(target_fn.clone()),
changes: Vec::new(),
});
}
}
diffs
}
pub fn diff_sequences(source: &[SequenceInfo], target: &[SequenceInfo]) -> Vec<SequenceDiff> {
let mut diffs = Vec::new();
let target_map: HashMap<&str, &SequenceInfo> = target.iter().map(|s| (s.name.as_str(), s)).collect();
let source_map: HashMap<&str, &SequenceInfo> = source.iter().map(|s| (s.name.as_str(), s)).collect();
for source_seq in source {
let Some(target_seq) = target_map.get(source_seq.name.as_str()) else {
diffs.push(SequenceDiff {
diff_type: "added".to_string(),
name: source_seq.name.clone(),
source: Some(source_seq.clone()),
target: None,
changes: Vec::new(),
});
continue;
};
let mut changes = Vec::new();
if source_seq.data_type != target_seq.data_type {
changes.push(format!("data_type: {} → {}", target_seq.data_type, source_seq.data_type));
}
if source_seq.start_value != target_seq.start_value {
changes.push(format!("start: {} → {}", target_seq.start_value, source_seq.start_value));
}
if source_seq.min_value != target_seq.min_value {
changes.push(format!("min: {} → {}", target_seq.min_value, source_seq.min_value));
}
if source_seq.max_value != target_seq.max_value {
changes.push(format!("max: {} → {}", target_seq.max_value, source_seq.max_value));
}
if source_seq.increment != target_seq.increment {
changes.push(format!("increment: {} → {}", target_seq.increment, source_seq.increment));
}
if source_seq.cycle != target_seq.cycle {
changes.push(format!("cycle: {} → {}", target_seq.cycle, source_seq.cycle));
}
// Only compare last_value when both sides successfully retrieved it.
// Avoid false positives when one side lacks permission (returns None).
if let (Some(s), Some(t)) = (&source_seq.last_value, &target_seq.last_value) {
if s != t {
changes.push(format!("last_value: {} → {}", t, s));
}
}
if !changes.is_empty() {
diffs.push(SequenceDiff {
diff_type: "modified".to_string(),
name: source_seq.name.clone(),
source: Some(source_seq.clone()),
target: Some((*target_seq).clone()),
changes,
});
}
}
for target_seq in target {
if !source_map.contains_key(target_seq.name.as_str()) {
diffs.push(SequenceDiff {
diff_type: "removed".to_string(),
name: target_seq.name.clone(),
source: None,
target: Some(target_seq.clone()),
changes: Vec::new(),
});
}
}
diffs
}
pub fn diff_rules(source: &[RuleInfo], target: &[RuleInfo]) -> Vec<RuleDiff> {
let mut diffs = Vec::new();
let target_map: HashMap<&str, &RuleInfo> = target.iter().map(|r| (r.name.as_str(), r)).collect();
let source_map: HashMap<&str, &RuleInfo> = source.iter().map(|r| (r.name.as_str(), r)).collect();
for source_rule in source {
let Some(target_rule) = target_map.get(source_rule.name.as_str()) else {
diffs.push(RuleDiff {
diff_type: "added".to_string(),
name: source_rule.name.clone(),
source: Some(source_rule.clone()),
target: None,
changes: Vec::new(),
});
continue;
};
let mut changes = Vec::new();
if source_rule.definition != target_rule.definition {
changes.push("definition changed".to_string());
}
if !changes.is_empty() {
diffs.push(RuleDiff {
diff_type: "modified".to_string(),
name: source_rule.name.clone(),
source: Some(source_rule.clone()),
target: Some((*target_rule).clone()),
changes,
});
}
}
for target_rule in target {
if !source_map.contains_key(target_rule.name.as_str()) {
diffs.push(RuleDiff {
diff_type: "removed".to_string(),
name: target_rule.name.clone(),
source: None,
target: Some(target_rule.clone()),
changes: Vec::new(),
});
}
}
diffs
}
pub fn diff_owners(source: &[OwnerInfo], target: &[OwnerInfo]) -> Vec<OwnerDiff> {
let mut diffs = Vec::new();
let target_map: HashMap<&str, &OwnerInfo> = target.iter().map(|o| (o.object_name.as_str(), o)).collect();
let _source_map: HashMap<&str, &OwnerInfo> = source.iter().map(|o| (o.object_name.as_str(), o)).collect();
for source_owner in source {
let Some(target_owner) = target_map.get(source_owner.object_name.as_str()) else {
continue; // skip added/removed objects, only compare owners for common objects
};
let mut changes = Vec::new();
if source_owner.owner != target_owner.owner {
changes.push(format!("owner: {} → {}", target_owner.owner, source_owner.owner));
}
if !changes.is_empty() {
diffs.push(OwnerDiff {
diff_type: "modified".to_string(),
object_name: source_owner.object_name.clone(),
source: Some(source_owner.clone()),
target: Some((*target_owner).clone()),
changes,
});
}
}
diffs
}
fn quote_id(name: &str, db_type: DatabaseType) -> String {
profile_for(db_type).quote_ident(name)
}
fn column_def(col: &ColumnInfo, db_type: DatabaseType, source_dialect: Option<DialectKind>) -> String {
let profile = profile_for(db_type);
let mut definition = format!("{} {}", quote_id(&col.name, db_type), col.data_type);
if !col.is_nullable {
definition.push_str(" NOT NULL");
}
if let Some(default) = &col.column_default {
definition.push_str(&format!(
" DEFAULT {}",
default_literal(
default,
&col.data_type,
effective_source_dialect(source_dialect, db_type),
col.extra.as_deref()
)
));
}
if profile.inline_column_comment {
if let Some(comment) = &col.comment {
definition.push_str(&format!(" COMMENT {}", comment_literal(comment)));
}
}
definition
}
fn qualified_name(name: &str, db_type: DatabaseType, schema: Option<&str>) -> String {
schema
.map(str::trim)
.filter(|schema| !schema.is_empty())
.map(|schema| format!("{}.{}", quote_id(schema, db_type), quote_id(name, db_type)))
.unwrap_or_else(|| quote_id(name, db_type))
}
fn drop_index_sql(table_name: &str, index_name: &str, db_type: DatabaseType, schema: Option<&str>) -> String {
let profile = profile_for(db_type);
let table = qualified_name(table_name, db_type, schema);
let index = qualified_name(index_name, db_type, schema);
if profile.drop_index_uses_on_table {
format!("DROP INDEX {} ON {table};", quote_id(index_name, db_type))
} else {
format!("DROP INDEX IF EXISTS {index};")
}
}
fn mysql_index_column_sql(column: &str) -> String {
let trimmed = column.trim();
// MySQL metadata represents a functional key part as an expression wrapped for CREATE INDEX.
if trimmed.starts_with("((") && trimmed.ends_with("))") {
trimmed.to_string()
} else {
quote_id(column, DatabaseType::Mysql)
}
}
fn create_index_sql(table_name: &str, index: &IndexInfo, db_type: DatabaseType, schema: Option<&str>) -> String {
use crate::sql_dialect::ddl_profile::IndexTypePlacement;
let profile = profile_for(db_type);
let table = qualified_name(table_name, db_type, schema);
let columns =
index
.columns
.iter()
.map(|column| {
if db_type == DatabaseType::Mysql {
mysql_index_column_sql(column)
} else {
quote_id(column, db_type)
}
})
.collect::<Vec<_>>()
.join(", ");
let unique = if index.is_unique { "UNIQUE " } else { "" };
let index_type = index.index_type.as_deref().unwrap_or_default();
let (type_prefix, using_before_on, using_suffix) = if index_type.is_empty() {
(String::new(), String::new(), String::new())
} else {
match profile.index_type_placement {
IndexTypePlacement::None => (String::new(), String::new(), String::new()),
IndexTypePlacement::TypePrefix => (format!("{index_type} "), String::new(), String::new()),
IndexTypePlacement::UsingBeforeOn => (String::new(), format!(" USING {index_type}"), String::new()),
IndexTypePlacement::UsingSuffix => (String::new(), String::new(), format!(" USING {index_type}")),
}
};
let included_columns = index.included_columns.clone().unwrap_or_default();
let include_clause = if !included_columns.is_empty() && profile.index_supports_include {
format!(
" INCLUDE ({})",
included_columns.iter().map(|column| quote_id(column, db_type)).collect::<Vec<_>>().join(", ")
)
} else {
String::new()
};
let filter = if profile.index_supports_filter { index.filter.as_deref().unwrap_or_default() } else { "" };
let filter_clause = if filter.is_empty() { String::new() } else { format!(" WHERE {filter}") };
let comment = index.comment.as_deref().unwrap_or("");
let comment_clause = if !comment.trim().is_empty() && profile.index_supports_comment {
format!(" COMMENT {}", comment_literal(comment))
} else {
String::new()
};
// MySQL-style puts USING before ON and omits INCLUDE/WHERE placement used by PG/SS.
if profile.drop_index_uses_on_table {
format!(
"CREATE {unique}{type_prefix}INDEX {}{using_before_on} ON {table} ({columns}){comment_clause};",
quote_id(&index.name, db_type)
)
} else {
format!(
"CREATE {unique}{type_prefix}INDEX {} ON {table}{using_suffix} ({columns}){include_clause}{filter_clause};",
quote_id(&index.name, db_type)
)
}
}
fn drop_foreign_key_sql(table_name: &str, fk_name: &str, db_type: DatabaseType, schema: Option<&str>) -> String {
let profile = profile_for(db_type);
let table = qualified_name(table_name, db_type, schema);
let fk = quote_id(fk_name, db_type);
if profile.drop_fk_as_foreign_key {
format!("ALTER TABLE {table} DROP FOREIGN KEY {fk};")
} else {
format!("ALTER TABLE {table} DROP CONSTRAINT {fk};")
}
}
fn add_foreign_key_sql(table_name: &str, fk: &ForeignKeyInfo, db_type: DatabaseType, schema: Option<&str>) -> String {
let table = qualified_name(table_name, db_type, schema);
let ref_table = qualified_name(&fk.ref_table, db_type, fk.ref_schema.as_deref().or(schema));
let on_delete = fk.on_delete.as_ref().map(|action| format!(" ON DELETE {action}")).unwrap_or_default();
let on_update = fk.on_update.as_ref().map(|action| format!(" ON UPDATE {action}")).unwrap_or_default();
format!(
"ALTER TABLE {table} ADD CONSTRAINT {} FOREIGN KEY ({}) REFERENCES {ref_table} ({}){on_delete}{on_update};",
quote_id(&fk.name, db_type),
quote_id(&fk.column, db_type),
quote_id(&fk.ref_column, db_type)
)
}
fn drop_object_sql(diff: &TableDiff, db_type: DatabaseType, schema: Option<&str>, cascade: &str) -> String {
let object_type = if diff.object_type.as_deref() == Some("view") { "VIEW" } else { "TABLE" };
format!("DROP {object_type} IF EXISTS {}{cascade};", qualified_name(&diff.name, db_type, schema))
}
fn comment_literal(comment: &str) -> String {
format!("'{}'", comment.replace('\'', "''"))
}
/// Bare temporal keywords that are defaults in their own right and must not be quoted.
const TEMPORAL_DEFAULT_KEYWORDS: [&str; 8] =
["current_timestamp", "current_date", "current_time", "now", "localtime", "localtimestamp", "getdate", "sysdate"];
/// Prefixes that introduce an already-quoted literal: SQL Server / Sybase `N'x'`,
/// MySQL `b'1'` and `x'1f'`, Postgres `e'\n'`.
const QUOTED_LITERAL_PREFIXES: [&str; 4] = ["n'", "b'", "x'", "e'"];
/// The dialect the column metadata came from.
///
/// The caller does not always declare one. When it does not, the comparison is
/// same-dialect, so the target database is also the source.
fn effective_source_dialect(source_dialect: Option<DialectKind>, db_type: DatabaseType) -> DialectKind {
source_dialect.unwrap_or_else(|| DialectKind::from_database_type(db_type))
}
/// Render a column default as a SQL literal.
///
/// Drivers hand `column_default` back verbatim and they do not agree on its
/// shape, so the rule has to be bound to the dialect the value came from rather
/// than guessed from the value itself. The same bare token means different
/// things in different databases: `CURRENT_USER` is an expression on Postgres
/// and Oracle, while on MySQL a bare `CURRENT_USER` on a text column is the
/// literal string.
///
/// Only MySQL-family metadata strips the quotes from a string default, so it is
/// the only source that needs any repair here. Everywhere else the value already
/// arrives quoted, cast or wrapped, and is passed through untouched.
///
/// `table_structure_sql::util::format_default_for_sql` and
/// `transfer::format_mysql_default_literal` do the same job on their own paths;
/// both are private to their modules.
fn default_literal(default: &str, data_type: &str, source: DialectKind, extra: Option<&str>) -> String {
let normalized = default.trim();
// Every dialect except MySQL returns a string default already quoted, cast
// or wrapped, so a bare token there is an expression and rewriting it would
// change its meaning: Postgres `text DEFAULT CURRENT_USER`, Oracle
// `varchar2 DEFAULT USER`, SQL Server `('x')`.
if source != DialectKind::Mysql {
return normalized.to_string();
}
// MySQL 8.0.13 and later flag an expression default in `EXTRA`. That marker
// is authoritative, so consult it before looking at the value at all: a
// default is a literal unless the server says it was generated.
if extra.is_some_and(|value| value.to_ascii_uppercase().contains("DEFAULT_GENERATED")) {
return normalized.to_string();
}
// MySQL writes an expression default wrapped in parentheses, `DEFAULT
// (uuid())`, and reports it that way. The wrapping is the syntax, so it is
// a reliable marker even when `EXTRA` is not populated. Note this asks
// whether the value *is* parenthesised, not whether it merely contains a
// parenthesis: the string default `a(b)` is not wrapped and is still
// quoted.
if normalized.starts_with('(') && normalized.ends_with(')') {
return normalized.to_string();
}
// Already a literal: `'x'` or a prefixed form like `x'1f'`.
let lowered = normalized.to_ascii_lowercase();
if normalized.starts_with('\'') || QUOTED_LITERAL_PREFIXES.iter().any(|prefix| lowered.starts_with(prefix)) {
return normalized.to_string();
}
let base_type = data_type.split('(').next().unwrap_or(data_type).trim().to_ascii_lowercase();
let takes_text_literal =
["char", "text", "string", "clob", "enum", "set"].iter().any(|kind| base_type.contains(kind));
let takes_binary_literal = ["binary", "blob", "bytea"].iter().any(|kind| base_type.contains(kind));
let takes_temporal_literal = base_type.contains("date") || base_type.contains("time");
// Before 8.0.13 there is no `EXTRA` marker and a temporal column was the
// only place an expression default could appear.
if takes_temporal_literal && is_temporal_keyword_default(normalized) {
return normalized.to_string();
}
// A binary default is commonly reported as a hex literal, which is already
// valid unquoted; a bare string on the same column still needs quoting.
if takes_binary_literal && is_hex_literal(normalized) {
return normalized.to_string();
}
if takes_text_literal || takes_binary_literal || takes_temporal_literal {
// Deliberately no parenthesis check. MySQL reports the string default
// `'a(b)'` as the bare value `a(b)`, and treating a parenthesis as proof
// of a function call is what produced invalid `DEFAULT a(b)`.
return format!("'{}'", default.replace('\'', "''"));
}
normalized.to_string()
}
/// A bare temporal default, with or without a precision argument, so
/// `CURRENT_TIMESTAMP(6)` and `LOCALTIME(3)` are recognised alongside the bare
/// keywords. `transfer::is_mysql_function_default` already accepts the
/// parenthesised forms and this mirrors it.
///
/// Deliberately keyed on the known keywords rather than on the presence of a
/// parenthesis, so a string default such as `a(b)` is still quoted.
fn is_temporal_keyword_default(value: &str) -> bool {
let upper = value.to_ascii_uppercase();
TEMPORAL_DEFAULT_KEYWORDS.iter().any(|keyword| {
let keyword = keyword.to_ascii_uppercase();
upper == keyword || upper.strip_prefix(&keyword).is_some_and(|rest| rest.starts_with('('))
})
}
/// `0x61`, the shape MySQL reports a binary default in.
fn is_hex_literal(value: &str) -> bool {
let Some(digits) = value.strip_prefix("0x").or_else(|| value.strip_prefix("0X")) else {
return false;
};
!digits.is_empty() && digits.chars().all(|c| c.is_ascii_hexdigit())
}
fn column_comment_sql(
table_name: &str,
column_name: &str,
comment: &str,
db_type: DatabaseType,
schema: Option<&str>,
) -> String {
let profile = profile_for(db_type);
if profile.column_comment_via_modify_only {
return format!("-- Column comment for {column_name}: use ALTER TABLE ... MODIFY COLUMN to set comment");
}
let table = qualified_name(table_name, db_type, schema);
format!("COMMENT ON COLUMN {table}.{} IS {};", quote_id(column_name, db_type), comment_literal(comment))
}
fn table_comment_sql(table_name: &str, comment: &str, db_type: DatabaseType, schema: Option<&str>) -> String {
let profile = profile_for(db_type);
let table = qualified_name(table_name, db_type, schema);
if profile.table_comment_via_alter {
format!("ALTER TABLE {table} COMMENT = {};", comment_literal(comment))
} else {
format!("COMMENT ON TABLE {table} IS {};", comment_literal(comment))
}
}
fn create_trigger_sql(
profile: &crate::sql_dialect::ddl_profile::DdlDialectProfile,
name: &str,
timing: &str,
event: &str,
table: &str,
body: &str,
) -> String {
use crate::sql_dialect::ddl_profile::TriggerTemplate;
let qname = profile.quote_ident(name);
match profile.trigger_template {
TriggerTemplate::MysqlStyle => {
format!("CREATE TRIGGER {qname} {timing} {event} ON {table} FOR EACH ROW BEGIN\n{body} END;")
}
TriggerTemplate::PostgresStyle => {
format!(
"CREATE TRIGGER {qname} {timing} {event} ON {table} FOR EACH ROW EXECUTE FUNCTION {};",
body.trim_end_matches(';')
)
}
TriggerTemplate::SqlServerStyle => {
format!("CREATE TRIGGER {qname} ON {table} {timing} {event} AS BEGIN {body} END;")
}
TriggerTemplate::GenericRowBody => {
format!("CREATE TRIGGER {qname} {timing} {event} ON {table} FOR EACH ROW BEGIN {body} END;")
}
}
}
fn generate_create_table_sql(
name: &str,
columns: &[ColumnDiff],
indexes: &[IndexDiff],
foreign_keys: &[ForeignKeyDiff],
table_comment: Option<&str>,
db_type: DatabaseType,
schema: Option<&str>,
source_dialect: Option<DialectKind>,
field_mappings: &[FieldMapping],
triggers: &[TriggerInfo],
) -> (String, Vec<MissingRollbackObject>) {
let mut lines = Vec::new();
let target_dialect = DialectKind::from_database_type(db_type);
let profile = profile_for(db_type);
// Type rewrite: user mappings → profile type_map → DialectKind matrix → normalize.
// Call sites must not branch on individual DatabaseType values.
let map_type = |source_type: &str| -> String {
if let Some(user_target) = FieldMapping::apply_with_params(field_mappings, source_type, target_dialect) {
return user_target;
}
rewrite_column_type(source_type, db_type, source_dialect)
};
let table = qualified_name(name, db_type, schema);
// Collect column definitions
let mut col_defs = Vec::new();
let mut pk_cols = Vec::new();
let mut has_int_pk = false;
let mut auto_col_name: Option<String> = None;
for col_diff in columns {
let Some(col) = &col_diff.source else {
continue;
};
let col_name = quote_id(&col.name, db_type);
let mapped_type = map_type(&col.data_type);
let is_int = type_looks_integer(&mapped_type);
let auto_build = apply_auto_inc_to_column_def(&profile, &col_name, &mapped_type, col, is_int);
match auto_build {
AutoIncColumnBuild::Complete { def, .. } => {
col_defs.push(def);
if col.is_primary_key {
pk_cols.push(col_name);
}
continue;
}
AutoIncColumnBuild::AppendSuffix { suffix, skip_default, postgres_sequence } => {
let mut def = format!("{} {}", col_name, mapped_type);
if !col.is_nullable {
def.push_str(" NOT NULL");
}
if !skip_default {
if let Some(default) = &col.column_default {
def.push_str(&format!(
" DEFAULT {}",
default_literal(
default,
&mapped_type,
effective_source_dialect(source_dialect, db_type),
col.extra.as_deref()
)
));
}
}
if profile.inline_column_comment {
if let Some(comment) = col.comment.as_deref().filter(|c| !c.is_empty()) {
def.push_str(&format!(" COMMENT {}", comment_literal(comment)));
}
}
if !suffix.is_empty() {
def.push_str(suffix);
}
if postgres_sequence {
has_int_pk = true;
auto_col_name = Some(col.name.clone());
}
col_defs.push(def);
if col.is_primary_key {
pk_cols.push(quote_id(&col.name, db_type));
}
}
AutoIncColumnBuild::Normal { skip_default } => {
let mut def = format!("{} {}", col_name, mapped_type);
if !col.is_nullable {
def.push_str(" NOT NULL");
}
if !skip_default {
if let Some(default) = &col.column_default {
def.push_str(&format!(
" DEFAULT {}",
default_literal(
default,
&mapped_type,
effective_source_dialect(source_dialect, db_type),
col.extra.as_deref()
)
));
}
}
if profile.inline_column_comment {
if let Some(comment) = col.comment.as_deref().filter(|c| !c.is_empty()) {
def.push_str(&format!(" COMMENT {}", comment_literal(comment)));
}
}
col_defs.push(def);
if col.is_primary_key {
pk_cols.push(quote_id(&col.name, db_type));
}
}
}
}
if profile.foreign_keys_inline_in_create {
for fk_diff in foreign_keys {
let Some(fk) = &fk_diff.source else {
continue;
};
let ref_table = qualified_name(&fk.ref_table, db_type, fk.ref_schema.as_deref().or(schema));
let on_delete = fk.on_delete.as_ref().map(|action| format!(" ON DELETE {action}")).unwrap_or_default();
let on_update = fk.on_update.as_ref().map(|action| format!(" ON UPDATE {action}")).unwrap_or_default();
col_defs.push(format!(
"CONSTRAINT {} FOREIGN KEY ({}) REFERENCES {}({}){}{}",
quote_id(&fk.name, db_type),
quote_id(&fk.column, db_type),
ref_table,
quote_id(&fk.ref_column, db_type),
on_delete,
on_update
));
}
}
let mut create = format!("CREATE TABLE {} (\n", table);
create.push_str(&format!(" {}", col_defs.join(",\n ")));
if !pk_cols.is_empty() {
create.push_str(&format!(",\n PRIMARY KEY ({})", pk_cols.join(", ")));
}
create.push_str("\n);");
lines.push(format!("-- Create table: {}", name));
lines.push(create);
lines.push(String::new());
// Postgres identity / sequence
if has_int_pk {
if let Some(seq_col) = auto_col_name {
let seq_name = format!("{}_{}_seq", name, seq_col);
let quoted_seq = quote_id(&seq_name, db_type);
let quoted_col = quote_id(&seq_col, db_type);
lines.push(format!("CREATE SEQUENCE IF NOT EXISTS {} OWNED BY {}.{};", quoted_seq, table, quoted_col));
lines.push(format!(
"ALTER TABLE {} ALTER COLUMN {} SET DEFAULT nextval('{}');",
table, quoted_col, seq_name
));
lines.push(format!("ALTER SEQUENCE {} START WITH 1;", quoted_seq));
lines.push(String::new());
}
}
// Indexes
for idx_diff in indexes {
let Some(idx) = &idx_diff.source else {
continue;
};
if idx.is_primary {
continue;
}
lines.push(create_index_sql(name, idx, db_type, schema));
}
if !indexes.is_empty() {
lines.push(String::new());
}
// Foreign Keys (skipped when already inlined into CREATE TABLE via profile)
for fk_diff in foreign_keys {
if profile.foreign_keys_inline_in_create {
continue;
}
let Some(fk) = &fk_diff.source else {
continue;
};
let fk_name = quote_id(&fk.name, db_type);
let fk_col = quote_id(&fk.column, db_type);
let ref_table = qualified_name(&fk.ref_table, db_type, fk.ref_schema.as_deref().or(schema));
let ref_col = quote_id(&fk.ref_column, db_type);
let on_delete = fk.on_delete.as_ref().map(|a| format!(" ON DELETE {}", a)).unwrap_or_default();
let on_update = fk.on_update.as_ref().map(|a| format!(" ON UPDATE {}", a)).unwrap_or_default();
lines.push(format!(
"ALTER TABLE {} ADD CONSTRAINT {} FOREIGN KEY ({}) REFERENCES {}({}){}{};",
table, fk_name, fk_col, ref_table, ref_col, on_delete, on_update
));
}
if !foreign_keys.is_empty() {
lines.push(String::new());
}
// Column comments (ANSI COMMENT ON … when profile does not use inline COMMENT)
for col_diff in columns {
let Some(col) = &col_diff.source else {
continue;
};
if let Some(comment) = &col.comment {
if !comment.is_empty() {
let col_name = quote_id(&col.name, db_type);
let esc_comment = comment.replace('\'', "''");
if !profile.inline_column_comment {
lines.push(format!("COMMENT ON COLUMN {}.{} IS '{}';", table, col_name, esc_comment));
}
}
}
}
// Table comment
if let Some(comment) = table_comment {
if !comment.is_empty() {
lines.push(table_comment_sql(name, comment, db_type, schema));
}
}
// Trigger recreation — collect structured missing objects (do not rely on SQL comments alone).
let mut missing: Vec<MissingRollbackObject> = Vec::new();
if !triggers.is_empty() {
lines.push(String::new());
for trigger in triggers {
let event_desc = if trigger.event.to_uppercase().contains("INSERT") {
"INSERT"
} else if trigger.event.to_uppercase().contains("UPDATE") {
"UPDATE"
} else if trigger.event.to_uppercase().contains("DELETE") {
"DELETE"
} else {
&trigger.event
};
let timing = &trigger.timing;
if let Some(stmt) = &trigger.statement {
if !stmt.trim().is_empty() {
lines.push(create_trigger_sql(&profile, &trigger.name, timing, event_desc, &table, stmt));
} else {
missing.push(MissingRollbackObject {
kind: "trigger".to_string(),
name: trigger.name.clone(),
table: Some(name.to_string()),
reason: "trigger body is empty; cannot reconstruct CREATE TRIGGER".to_string(),
});
}
} else {
missing.push(MissingRollbackObject {
kind: "trigger".to_string(),
name: trigger.name.clone(),
table: Some(name.to_string()),
reason: "trigger statement/body missing from schema snapshot".to_string(),
});
}
}
if !missing.is_empty() {
lines.push(String::new());
lines.push(format!(
"-- WARNING: Rollback DDL is INCOMPLETE — one or more triggers on table '{}' could not be reconstructed.",
name
));
lines.push("-- Manual intervention required before executing this rollback script.".to_string());
for m in &missing {
lines.push(format!("-- missing {}: {} ({})", m.kind, m.name, m.reason));
}
}
}
(lines.join("\n"), missing)
}
fn append_sequence_diff_sql(
lines: &mut Vec<String>,
sequence_diffs: &[SequenceDiff],
profile: DdlDialectProfile,
db_type: DatabaseType,
schema: Option<&str>,
cascade: &str,
should_render: impl Fn(&str) -> bool,
) {
let mut matching = sequence_diffs.iter().filter(|diff| should_render(&diff.diff_type)).peekable();
if matching.peek().is_none() {
return;
}
lines.push(String::new());
lines.push("-- Sequences".to_string());
for diff in matching {
match diff.diff_type.as_str() {
"added" => {
if let Some(source) = &diff.source {
if let Some(template) = profile.sequence_create_template {
lines.push(format!("-- Create sequence: {}", diff.name));
let name = qualified_name(&diff.name, db_type, schema);
let cycle = if source.cycle { "CYCLE" } else { "NO CYCLE" };
lines.push(DdlDialectProfile::render_template(
template,
&[
("name", &name),
("data_type", &source.data_type),
("start_value", &source.start_value),
("increment", &source.increment),
("min_value", &source.min_value),
("max_value", &source.max_value),
("cycle", cycle),
],
));
} else {
lines.push(format!(
"-- Skip sequence {}: target database does not support sequence DDL generation",
diff.name
));
}
}
}
"removed" => {
if let Some(template) = profile.sequence_drop_template {
lines.push(format!("-- Drop sequence: {}", diff.name));
let name = qualified_name(&diff.name, db_type, schema);
lines.push(DdlDialectProfile::render_template(template, &[("name", &name), ("cascade", cascade)]));
} else {
lines.push(format!("-- Skip drop sequence {}: unsupported on target", diff.name));
}
}
"modified" => {
if let Some(source) = &diff.source {
if let Some(template) = profile.sequence_alter_template {
lines.push(format!("-- Alter sequence: {}", diff.name));
let name = qualified_name(&diff.name, db_type, schema);
let cycle = if source.cycle { "CYCLE" } else { "NO CYCLE" };
lines.push(DdlDialectProfile::render_template(
template,
&[
("name", &name),
("data_type", &source.data_type),
("start_value", &source.start_value),
("increment", &source.increment),
("min_value", &source.min_value),
("max_value", &source.max_value),
("cycle", cycle),
],
));
} else {
lines.push(format!("-- Skip alter sequence {}: unsupported on target", diff.name));
}
}
}
_ => {}
}
}
}
#[allow(clippy::too_many_arguments)]
pub fn generate_schema_sync_sql(
diffs: &[TableDiff],
function_diffs: &[FunctionDiff],
sequence_diffs: &[SequenceDiff],
rule_diffs: &[RuleDiff],
owner_diffs: &[OwnerDiff],
db_type: DatabaseType,
schema: Option<&str>,
cascade_delete: bool,
source_dialect: Option<DialectKind>,
field_mappings: &[FieldMapping],
) -> String {
generate_schema_sync_sql_inner(
diffs,
function_diffs,
sequence_diffs,
rule_diffs,
owner_diffs,
db_type,
schema,
cascade_delete,
source_dialect,
field_mappings,
)
.0
}
fn generate_schema_sync_sql_inner(
diffs: &[TableDiff],
function_diffs: &[FunctionDiff],
sequence_diffs: &[SequenceDiff],
rule_diffs: &[RuleDiff],
owner_diffs: &[OwnerDiff],
db_type: DatabaseType,
schema: Option<&str>,
cascade_delete: bool,
source_dialect: Option<DialectKind>,
field_mappings: &[FieldMapping],
) -> (String, Vec<MissingRollbackObject>) {
let mut lines = Vec::new();
let mut missing_objects: Vec<MissingRollbackObject> = Vec::new();
let profile = profile_for(db_type);
let cascade = if cascade_delete { " CASCADE" } else { "" };
let map_type = |source_type: &str| -> String {
let tgt = DialectKind::from_database_type(db_type);
if let Some(user_target) = FieldMapping::apply_with_params(field_mappings, source_type, tgt) {
return user_target;
}
rewrite_column_type(source_type, db_type, source_dialect)
};
let is_same_dialect =
source_dialect.map(|source| DialectKind::from_database_type(db_type) == source).unwrap_or(false);
append_sequence_diff_sql(&mut lines, sequence_diffs, profile, db_type, schema, cascade, |diff_type| {
diff_type == "added"
});
for diff in diffs {
let table = qualified_name(&diff.name, db_type, schema);
if diff.diff_type == "added" && diff.object_type.as_deref() == Some("view") {
if let Some(ddl) = &diff.ddl {
if is_same_dialect || source_dialect.is_none() {
lines.push(format!("-- Create view: {}", diff.name));
lines.push(format!("{};", ddl.trim_end().trim_end_matches(';')));
lines.push(String::new());
continue;
}
}
lines.push(format!("-- View exists only in source: {}", diff.name));
if diff.ddl.is_some() {
lines.push("-- Source view definition cannot be reused across different SQL dialects.".to_string());
} else {
lines.push("-- Source view definition is not available from this driver yet.".to_string());
}
lines.push(String::new());
continue;
}
if diff.diff_type == "added" && diff.object_type.as_deref() != Some("view") {
let has_structured_snapshot = diff.columns.as_ref().is_some_and(|columns| !columns.is_empty());
let is_rollback_recreation = diff.ddl.is_none() && diff.target_ddl.is_some();
if is_rollback_recreation {
if has_structured_snapshot {
let trigger_infos: Vec<TriggerInfo> = diff
.triggers
.as_ref()
.map_or_else(Vec::new, |triggers| triggers.iter().filter_map(|t| t.source.clone()).collect());
let (generated, missing) = generate_create_table_sql(
&diff.name,
diff.columns.as_ref().map_or(&[] as &[ColumnDiff], |columns| columns.as_slice()),
diff.indexes.as_ref().map_or(&[] as &[IndexDiff], |indexes| indexes.as_slice()),
diff.foreign_keys
.as_ref()
.map_or(&[] as &[ForeignKeyDiff], |foreign_keys| foreign_keys.as_slice()),
diff.source_table_comment.as_ref().and_then(|comment| comment.as_deref()),
db_type,
schema,
None,
field_mappings,
&trigger_infos,
);
if !generated.is_empty() {
lines.push(generated);
}
missing_objects.extend(missing);
} else if let Some(ddl) = diff.target_ddl.as_deref() {
// Inversion places only the removed target table's native
// DDL here, validating that it belongs to the dialect restored.
lines.push(format!("-- Recreate table from native target DDL: {}", diff.name));
lines.push(format!("{};", ddl.trim_end_matches(';')));
lines.push(String::new());
}
} else if is_same_dialect
|| (source_dialect.is_none()
&& diff.ddl.is_some()
&& (profile.prefers_native_source_ddl || !has_structured_snapshot))
{
// Prefer native source DDL when the target profile wants it
// (MySQL-family), or as fallback without a structured snapshot.
if let Some(ddl) = &diff.ddl {
lines.push(format!("-- Create {}: {}", diff.object_type.as_deref().unwrap_or("table"), diff.name));
lines.push(format!("{};", ddl));
lines.push(String::new());
} else if let Some(cols) = &diff.columns {
let trigger_infos: Vec<TriggerInfo> = diff
.triggers
.as_ref()
.map_or_else(Vec::new, |triggers| triggers.iter().filter_map(|t| t.source.clone()).collect());
let (gen, missing) = generate_create_table_sql(
&diff.name,
cols,
diff.indexes.as_ref().map_or(&[] as &[IndexDiff], |v| v.as_slice()),
diff.foreign_keys.as_ref().map_or(&[] as &[ForeignKeyDiff], |v| v.as_slice()),
diff.source_table_comment.as_ref().and_then(|c| c.as_deref()),
db_type,
schema,
source_dialect,
field_mappings,
&trigger_infos,
);
if !gen.is_empty() {
lines.push(gen);
}
missing_objects.extend(missing);
}
} else if has_structured_snapshot {
// Cross-dialect → generate CREATE TABLE from column info
let _cols: &[ColumnDiff] = diff.columns.as_ref().map_or(&[] as &[ColumnDiff], |v| v.as_slice());
let _idxs: &[IndexDiff] = diff.indexes.as_ref().map_or(&[] as &[IndexDiff], |v| v.as_slice());
let _fks: &[ForeignKeyDiff] =
diff.foreign_keys.as_ref().map_or(&[] as &[ForeignKeyDiff], |v| v.as_slice());
let trigger_infos: Vec<TriggerInfo> = diff
.triggers
.as_ref()
.map_or_else(Vec::new, |triggers| triggers.iter().filter_map(|t| t.source.clone()).collect());
let (gen, missing) = generate_create_table_sql(
&diff.name,
diff.columns.as_ref().map_or(&[] as &[ColumnDiff], |v| v.as_slice()),
diff.indexes.as_ref().map_or(&[] as &[IndexDiff], |v| v.as_slice()),
diff.foreign_keys.as_ref().map_or(&[] as &[ForeignKeyDiff], |v| v.as_slice()),
diff.source_table_comment.as_ref().and_then(|c| c.as_deref()),
db_type,
schema,
source_dialect,
field_mappings,
&trigger_infos,
);
if !gen.is_empty() {
lines.push(gen);
}
missing_objects.extend(missing);
}
continue;
}
if diff.diff_type == "removed" {
lines.push(format!("-- Drop {}: {}", diff.object_type.as_deref().unwrap_or("table"), diff.name));
lines.push(drop_object_sql(diff, db_type, schema, cascade));
lines.push(String::new());
continue;
}
if diff.diff_type != "modified" {
continue;
}
let mut parts = Vec::new();
let mut standalone_statements = Vec::new();
if let Some(foreign_keys) = &diff.foreign_keys {
for fk in foreign_keys {
if fk.diff_type == "removed" || fk.diff_type == "modified" {
lines.push(drop_foreign_key_sql(&diff.name, &fk.name, db_type, schema));
}
}
}
if let Some(columns) = &diff.columns {
let convert_col =
|col: &ColumnInfo| -> ColumnInfo { ColumnInfo { data_type: map_type(&col.data_type), ..col.clone() } };
for column in columns {
match column.diff_type.as_str() {
"added" => {
if let Some(source) = &column.source {
let position = if db_type == DatabaseType::Mysql {
match &column.add_position {
Some(ColumnAddPosition::First) => " FIRST".to_string(),
Some(ColumnAddPosition::After(predecessor)) => {
format!(" AFTER {}", quote_id(predecessor, db_type))
}
None => String::new(),
}
} else {
String::new()
};
parts.push(format!(
" ADD COLUMN {}{}",
column_def(&convert_col(source), db_type, source_dialect),
position
));
}
}
"removed" => {
parts.push(format!(" DROP COLUMN {}", quote_id(&column.name, db_type)));
}
"modified" => {
if let Some(source) = &column.source {
let mapped = convert_col(source);
if profile.alter_uses_modify_column {
if column.changes.iter().any(|change| !change.starts_with("order:")) {
parts.push(format!(
" MODIFY COLUMN {}",
column_def(&mapped, db_type, source_dialect)
));
}
} else {
let name = quote_id(&column.name, db_type);
if column.changes.iter().any(|change| change.starts_with("type:")) {
parts.push(format!(" ALTER COLUMN {name} TYPE {}", mapped.data_type));
}
if column.changes.iter().any(|change| change.starts_with("nullable:")) {
parts.push(if source.is_nullable {
format!(" ALTER COLUMN {name} DROP NOT NULL")
} else {
format!(" ALTER COLUMN {name} SET NOT NULL")
});
}
if column.changes.iter().any(|change| change.starts_with("default:")) {
parts.push(if let Some(default) = &source.column_default {
format!(
" ALTER COLUMN {name} SET DEFAULT {}",
default_literal(
default,
&mapped.data_type,
effective_source_dialect(source_dialect, db_type),
source.extra.as_deref()
)
)
} else {
format!(" ALTER COLUMN {name} DROP DEFAULT")
});
}
}
}
}
"renamed" => {
if let (Some(source), Some(target_col)) = (&column.source, &column.target) {
use crate::sql_dialect::ddl_profile::RenameColumnSyntax;
let mapped = convert_col(source);
match profile.rename_column {
RenameColumnSyntax::MysqlChangeColumn => {
let old_name = quote_id(&target_col.name, db_type);
parts.push(format!(
" CHANGE COLUMN {} {}",
old_name,
column_def(&mapped, db_type, source_dialect)
));
}
RenameColumnSyntax::RenameColumn => {
let old_name = quote_id(&target_col.name, db_type);
let new_name = quote_id(&column.name, db_type);
parts.push(format!(" RENAME COLUMN {old_name} TO {new_name}"));
if source.data_type.to_lowercase() != target_col.data_type.to_lowercase() {
parts.push(format!(" ALTER COLUMN {new_name} TYPE {}", mapped.data_type));
}
if source.is_nullable != target_col.is_nullable {
let action = if source.is_nullable { "DROP NOT NULL" } else { "SET NOT NULL" };
parts.push(format!(" ALTER COLUMN {new_name} {action}"));
}
}
RenameColumnSyntax::AlterColumnRenameTo => {
let old_name = quote_id(&target_col.name, db_type);
let new_name = quote_id(&column.name, db_type);
parts.push(format!(" ALTER COLUMN {old_name} RENAME TO {new_name}"));
if source.data_type.to_lowercase() != target_col.data_type.to_lowercase() {
parts.push(format!(
" ALTER COLUMN {new_name} SET DATA TYPE {}",
mapped.data_type
));
}
}
RenameColumnSyntax::SqlServerSpRename => {
let target_table = qualified_name(&diff.name, db_type, schema);
let full_obj_path =
format!("{target_table}.{}", quote_id(&target_col.name, db_type));
standalone_statements.push(format!(
"EXEC sp_rename '{}', '{}', 'COLUMN';",
full_obj_path.replace('\'', "''"),
column.name.replace('\'', "''")
));
}
}
}
}
_ => {}
}
}
}
if !standalone_statements.is_empty() || !parts.is_empty() {
lines.push(format!("-- Alter table: {}", diff.name));
lines.extend(standalone_statements);
if !parts.is_empty() {
if profile.alter_batches_clauses {
lines.push(format!("ALTER TABLE {table}"));
lines.push(format!("{};", parts.join(",\n")));
} else {
for part in parts {
lines.push(format!("ALTER TABLE {table}{part};"));
}
}
}
lines.push(String::new());
}
if !profile.column_comment_via_modify_only {
if let Some(columns) = &diff.columns {
for column in columns {
if let Some(source) = &column.source {
if column.changes.iter().any(|change| change.starts_with("comment:")) {
lines.push(column_comment_sql(
&diff.name,
&column.name,
source.comment.as_deref().unwrap_or_default(),
db_type,
schema,
));
}
if column.diff_type == "added" {
if let Some(comment) = &source.comment {
lines.push(column_comment_sql(&diff.name, &column.name, comment, db_type, schema));
}
}
if column.diff_type == "renamed" {
if let Some(comment) = &source.comment {
lines.push(column_comment_sql(&diff.name, &column.name, comment, db_type, schema));
}
}
}
}
}
}
if diff.source_table_comment.is_some() && diff.source_table_comment != diff.target_table_comment {
let comment = diff.source_table_comment.as_ref().and_then(|comment| comment.as_deref()).unwrap_or_default();
lines.push(table_comment_sql(&diff.name, comment, db_type, schema));
}
if let Some(indexes) = &diff.indexes {
for index in indexes {
match index.diff_type.as_str() {
"added" => {
if let Some(source) = &index.source {
lines.push(create_index_sql(&diff.name, source, db_type, schema));
}
}
"removed" => lines.push(drop_index_sql(&diff.name, &index.name, db_type, schema)),
"modified" => {
if let Some(source) = &index.source {
lines.push(drop_index_sql(&diff.name, &index.name, db_type, schema));
lines.push(create_index_sql(&diff.name, source, db_type, schema));
}
}
_ => {}
}
}
}
if let Some(foreign_keys) = &diff.foreign_keys {
for fk in foreign_keys {
if fk.diff_type == "added" || fk.diff_type == "modified" {
if let Some(source) = &fk.source {
lines.push(add_foreign_key_sql(&diff.name, source, db_type, schema));
}
}
}
}
if let Some(triggers) = &diff.triggers {
for trigger in triggers {
lines.push(format!(
"-- Trigger {}: {} on {}; review trigger definition manually.",
trigger.diff_type, trigger.name, diff.name
));
}
}
if diff.indexes.as_ref().is_some_and(|indexes| !indexes.is_empty())
|| diff.foreign_keys.as_ref().is_some_and(|foreign_keys| !foreign_keys.is_empty())
|| diff.triggers.as_ref().is_some_and(|triggers| !triggers.is_empty())
{
lines.push(String::new());
}
if profile.warn_fk_needs_table_rebuild
&& diff.foreign_keys.as_ref().is_some_and(|foreign_keys| !foreign_keys.is_empty())
{
lines.push(format!("-- Foreign key synchronization may require table rebuild for: {}", diff.name));
lines.push(String::new());
}
}
// Function diffs — only emit executable SQL when profile has templates
if !function_diffs.is_empty() {
lines.push(String::new());
lines.push("-- Functions".to_string());
for diff in function_diffs {
match diff.diff_type.as_str() {
"added" | "modified" => {
if let Some(source) = &diff.source {
if let Some(template) = profile.function_create_template {
let verb = if diff.diff_type == "added" { "Create" } else { "Alter" };
lines.push(format!("-- {verb} function: {}", diff.name));
let create_kw = if profile.create_function_or_replace {
"CREATE OR REPLACE FUNCTION"
} else {
"CREATE FUNCTION"
};
let name = qualified_name(&diff.name, db_type, schema);
lines.push(DdlDialectProfile::render_template(
template,
&[("create_kw", create_kw), ("name", &name), ("definition", &source.definition)],
));
} else {
lines.push(format!(
"-- Skip function {}: target database does not support function DDL generation",
diff.name
));
}
}
}
"removed" => {
if let Some(template) = profile.function_drop_template {
lines.push(format!("-- Drop function: {}", diff.name));
let name = qualified_name(&diff.name, db_type, schema);
lines.push(DdlDialectProfile::render_template(
template,
&[("name", &name), ("cascade", cascade)],
));
} else {
lines.push(format!("-- Skip drop function {}: unsupported on target", diff.name));
}
}
_ => {}
}
}
}
append_sequence_diff_sql(&mut lines, sequence_diffs, profile, db_type, schema, cascade, |diff_type| {
matches!(diff_type, "removed" | "modified")
});
// Rule diffs (PostgreSQL RULE)
if !rule_diffs.is_empty() {
lines.push(String::new());
lines.push("-- Rules".to_string());
for diff in rule_diffs {
if profile.rule_drop_template.is_none() && !profile.supports_rule_ddl {
lines.push(format!("-- Skip rule {}: target database does not support RULE DDL", diff.name));
continue;
}
match diff.diff_type.as_str() {
"added" => {
if let Some(source) = &diff.source {
if profile.supports_rule_ddl {
lines.push(format!("-- Create rule: {}", diff.name));
lines.push(source.definition.clone());
} else {
lines
.push(format!("-- Skip rule {}: target database does not support RULE DDL", diff.name));
}
}
}
"removed" => {
if let Some(template) = profile.rule_drop_template {
lines.push(format!("-- Drop rule: {}", diff.name));
// Removed diffs store the object on `target`; tests may put it on `source`.
if let Some(rule) = diff.source.as_ref().or(diff.target.as_ref()) {
let table_name = qualified_name(&rule.table_name, db_type, schema);
lines.push(DdlDialectProfile::render_template(
template,
&[("rule_name", &diff.name), ("table_name", &table_name), ("cascade", cascade)],
));
}
} else {
lines.push(format!("-- Skip rule {}: target database does not support RULE DDL", diff.name));
}
}
"modified" => {
if let Some(source) = &diff.source {
if let Some(template) = profile.rule_drop_template {
lines.push(format!("-- Alter rule: {}", diff.name));
let table_name = qualified_name(&source.table_name, db_type, schema);
lines.push(DdlDialectProfile::render_template(
template,
&[("rule_name", &diff.name), ("table_name", &table_name), ("cascade", cascade)],
));
lines.push(source.definition.clone());
} else {
lines
.push(format!("-- Skip rule {}: target database does not support RULE DDL", diff.name));
}
}
}
_ => {}
}
}
}
// Owner diffs
if !owner_diffs.is_empty() {
lines.push(String::new());
lines.push("-- Owners".to_string());
for diff in owner_diffs {
if let (Some(source), Some(_target)) = (&diff.source, &diff.target) {
if let Some(template) = profile.owner_alter_template {
let object_type = match source.object_type.as_str() {
"TABLE" => "TABLE",
"VIEW" => "VIEW",
"SEQUENCE" => "SEQUENCE",
_ => "TABLE",
};
let name = qualified_name(&diff.object_name, db_type, schema);
lines.push(DdlDialectProfile::render_template(
template,
&[("object_type", object_type), ("name", &name), ("owner", &source.owner)],
));
} else {
lines.push(format!("-- Skip OWNER change for {}: unsupported on target", diff.object_name));
}
}
}
}
(lines.join("\n").trim().to_string(), missing_objects)
}
#[cfg(test)]
mod tests {
use super::*;
fn index(overrides: IndexInfo) -> IndexInfo {
IndexInfo {
name: if overrides.name.is_empty() { "idx_users_email".to_string() } else { overrides.name },
columns: if overrides.columns.is_empty() { vec!["email".to_string()] } else { overrides.columns },
is_unique: overrides.is_unique,
is_primary: overrides.is_primary,
filter: overrides.filter,
index_type: overrides.index_type,
included_columns: overrides.included_columns,
comment: overrides.comment,
}
}
fn foreign_key(overrides: ForeignKeyInfo) -> ForeignKeyInfo {
ForeignKeyInfo {
name: if overrides.name.is_empty() { "orders_user_id_fk".to_string() } else { overrides.name },
column: if overrides.column.is_empty() { "user_id".to_string() } else { overrides.column },
ref_schema: overrides.ref_schema,
ref_table: if overrides.ref_table.is_empty() { "users".to_string() } else { overrides.ref_table },
ref_column: if overrides.ref_column.is_empty() { "id".to_string() } else { overrides.ref_column },
on_update: overrides.on_update,
on_delete: overrides.on_delete,
}
}
fn column(name: &str, data_type: &str, comment: Option<&str>) -> ColumnInfo {
ColumnInfo {
name: name.to_string(),
data_type: data_type.to_string(),
is_nullable: false,
column_default: None,
is_primary_key: false,
is_unique: false,
extra: None,
comment: comment.map(str::to_string),
numeric_precision: None,
numeric_scale: None,
character_maximum_length: None,
enum_values: None,
character_set: None,
collation: None,
}
}
fn table_info(name: &str, table_type: &str) -> TableInfo {
TableInfo {
name: name.to_string(),
table_type: table_type.to_string(),
comment: None,
parent_schema: None,
parent_name: None,
}
}
fn schema_detail(name: &str, ddl: Option<&str>) -> TableSchemaDetail {
TableSchemaDetail {
name: name.to_string(),
columns: vec![],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: ddl.map(str::to_string),
}
}
fn common_mysql_view_options(source_ddl: Option<&str>, target_ddl: Option<&str>) -> SchemaDiffPreparationOptions {
SchemaDiffPreparationOptions {
source_tables: vec![table_info("active_orders", "VIEW")],
target_tables: vec![table_info("active_orders", "VIEW")],
source_details: vec![schema_detail("active_orders", source_ddl)],
target_details: vec![schema_detail("active_orders", target_ddl)],
database_type: DatabaseType::Mysql,
source_dialect: Some(DialectKind::Mysql),
target_dialect: Some(DialectKind::Mysql),
..Default::default()
}
}
#[test]
fn ignores_column_order_when_option_is_disabled() {
let diffs = diff_columns_with_options(
&[column("id", "int", None), column("name", "varchar(64)", None), column("status", "varchar(16)", None)],
&[column("status", "varchar(16)", None), column("id", "int", None), column("name", "varchar(64)", None)],
false,
false,
false,
0.5,
);
assert!(diffs.is_empty());
}
#[test]
fn detects_column_order_when_option_is_enabled() {
let diffs = diff_columns_with_options(
&[column("id", "int", None), column("name", "varchar(64)", None), column("status", "varchar(16)", None)],
&[column("status", "varchar(16)", None), column("id", "int", None), column("name", "varchar(64)", None)],
false,
true,
false,
0.5,
);
assert_eq!(diffs.len(), 3);
assert_eq!(diffs[0].changes, vec!["order: 2 → 1"]);
}
#[test]
fn detects_column_rename_with_same_type() {
let source = vec![
column("id", "int", None),
column("name2", "varchar(120)", None),
column("del_flag", "tinyint", None),
column("create_at", "datetime", None),
];
let target =
vec![column("id", "int", None), column("name", "varchar(120)", None), column("del_flag", "tinyint", None)];
let diffs = diff_columns_with_options(&source, &target, false, false, true, 0.5);
let renamed: Vec<_> = diffs.iter().filter(|d| d.diff_type == "renamed").collect();
let added: Vec<_> = diffs.iter().filter(|d| d.diff_type == "added").collect();
let removed: Vec<_> = diffs.iter().filter(|d| d.diff_type == "removed").collect();
assert_eq!(renamed.len(), 1, "should detect one renamed column");
assert_eq!(renamed[0].name, "name2");
assert_eq!(renamed[0].changes, vec!["name → name2"]);
assert_eq!(added.len(), 1, "should have one truly added column (create_at)");
assert_eq!(added[0].name, "create_at");
assert!(removed.is_empty(), "should have no removed columns");
}
#[test]
fn detects_column_rename_with_compatible_type() {
let source = vec![column("col_a", "varchar(64)", None), column("col_b", "int", None)];
let target = vec![column("col_a_old", "varchar(100)", None), column("col_b", "int", None)];
let diffs = diff_columns_with_options(&source, &target, false, false, true, 0.5);
let renamed: Vec<_> = diffs.iter().filter(|d| d.diff_type == "renamed").collect();
assert_eq!(renamed.len(), 1, "should detect rename across varchar family");
assert_eq!(renamed[0].changes, vec!["col_a_old → col_a"]);
}
#[test]
fn no_rename_detection_when_disabled() {
let source = vec![
column("id", "int", None),
column("name2", "varchar(120)", None),
column("create_at", "datetime", None),
];
let target = vec![column("id", "int", None), column("name", "varchar(120)", None)];
let diffs = diff_columns_with_options(&source, &target, false, false, false, 0.5);
let renamed: Vec<_> = diffs.iter().filter(|d| d.diff_type == "renamed").collect();
let added: Vec<_> = diffs.iter().filter(|d| d.diff_type == "added").collect();
let removed: Vec<_> = diffs.iter().filter(|d| d.diff_type == "removed").collect();
assert!(renamed.is_empty(), "should not detect renames when disabled");
assert_eq!(added.len(), 2);
assert_eq!(removed.len(), 1);
}
#[test]
fn rename_not_detected_with_unrelated_types() {
let source = vec![column("col_a", "varchar(120)", None), column("col_b", "int", None)];
let target = vec![column("col_old", "int", None), column("col_b", "int", None)];
let diffs = diff_columns_with_options(&source, &target, false, false, true, 0.5);
let renamed: Vec<_> = diffs.iter().filter(|d| d.diff_type == "renamed").collect();
assert!(renamed.is_empty(), "should not rename across unrelated types");
}
#[test]
fn rename_with_rollback_graph_inversion() {
let source = vec![column("id", "int", None), column("new_name", "varchar(120)", None)];
let target = vec![column("id", "int", None), column("old_name", "varchar(120)", None)];
let diffs = diff_columns_with_options(&source, &target, false, false, true, 0.5);
let inverted = RollbackGraph::invert_columns(&diffs);
let renamed_inv: Vec<_> = inverted.iter().filter(|d| d.diff_type == "renamed").collect();
assert_eq!(renamed_inv.len(), 1, "inverted rename should exist");
assert_eq!(renamed_inv[0].name, "old_name");
assert_eq!(renamed_inv[0].changes, vec!["new_name → old_name"]);
}
// -- helpers ----------------------------------------------
fn make_col_diffs(source: &[(&str, &str)], target: &[(&str, &str)], detect_renames: bool) -> Vec<ColumnDiff> {
let s: Vec<ColumnInfo> = source.iter().map(|(n, t)| column(n, t, None)).collect();
let t: Vec<ColumnInfo> = target.iter().map(|(n, t)| column(n, t, None)).collect();
diff_columns_with_options(&s, &t, false, false, detect_renames, 0.5)
}
fn wrap_table_diff(name: &str, columns: Vec<ColumnDiff>) -> TableDiff {
TableDiff {
diff_type: "modified".to_string(),
object_type: Some("table".to_string()),
name: name.to_string(),
columns: Some(columns),
indexes: None,
foreign_keys: None,
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
}
}
fn gen_sql(diff: TableDiff, db_type: DatabaseType, source_dialect: Option<DialectKind>) -> String {
generate_schema_sync_sql(&[diff], &[], &[], &[], &[], db_type, None, false, source_dialect, &[])
}
// -- 1. Same-dialect: MySQL (backticks, MODIFY/CHANGE/ADD COLUMN) --
#[test]
fn mysql_same_dialect_rename_and_add() {
let diffs = make_col_diffs(
&[("id", "int(11)"), ("name2", "varchar(120)"), ("del_flag", "tinyint(2)"), ("create_at", "datetime")],
&[("id", "int"), ("name", "varchar(120)"), ("del_flag", "tinyint")],
true,
);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Mysql, None);
assert!(sql.contains("CHANGE COLUMN `name` `name2`"), "MySQL rename: {sql}");
assert!(sql.contains("ADD COLUMN `create_at`"), "MySQL new col: {sql}");
assert!(sql.contains("MODIFY COLUMN `id`"), "MySQL modify type: {sql}");
assert!(!sql.contains("DROP COLUMN"), "MySQL no drop: {sql}");
}
#[test]
fn mysql_add_columns_preserve_source_positions() {
let diffs = make_col_diffs(
&[("first", "int"), ("a", "int"), ("middle", "varchar(32)"), ("next", "int"), ("last", "int")],
&[("a", "int"), ("last", "int")],
false,
);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Mysql, None);
assert!(sql.contains("ADD COLUMN `first` int NOT NULL FIRST"), "first position: {sql}");
assert!(sql.contains("ADD COLUMN `middle` varchar(32) NOT NULL AFTER `a`"), "middle position: {sql}");
assert!(sql.contains("ADD COLUMN `next` int NOT NULL AFTER `middle`"), "consecutive additions: {sql}");
}
#[test]
fn mysql_add_column_quotes_predecessor_and_keeps_trailing_position() {
let diffs = make_col_diffs(
&[("odd`name", "int"), ("middle", "int"), ("tail", "int"), ("new_tail", "int")],
&[("odd`name", "int"), ("tail", "int")],
false,
);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Mysql, None);
assert!(sql.contains("ADD COLUMN `middle` int NOT NULL AFTER `odd``name`"), "quoted predecessor: {sql}");
assert!(sql.contains("ADD COLUMN `new_tail` int NOT NULL AFTER `tail`"), "trailing position: {sql}");
}
#[test]
fn non_mysql_add_columns_do_not_emit_mysql_position_clauses() {
let diffs = make_col_diffs(&[("first", "int"), ("a", "int"), ("middle", "int")], &[("a", "int")], false);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Postgres, None);
assert!(!sql.contains(" FIRST"), "PostgreSQL must not use FIRST: {sql}");
assert!(!sql.contains(" AFTER "), "PostgreSQL must not use AFTER: {sql}");
}
#[test]
fn mysql_add_after_renamed_predecessor_uses_final_source_name() {
let diffs =
make_col_diffs(&[("new_name", "varchar(32)"), ("inserted", "int")], &[("old_name", "varchar(32)")], true);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Mysql, None);
assert!(sql.contains("ADD COLUMN `inserted` int NOT NULL AFTER `new_name`"), "rename predecessor: {sql}");
assert!(sql.contains("CHANGE COLUMN `old_name` `new_name`"), "rename remains present: {sql}");
}
#[test]
fn mysql_manual_added_diff_without_position_keeps_legacy_sql() {
let diff = ColumnDiff {
diff_type: "added".into(),
name: "legacy".into(),
source: Some(column("legacy", "int", None)),
target: None,
changes: Vec::new(),
add_position: None,
};
let sql = gen_sql(wrap_table_diff("t", vec![diff]), DatabaseType::Mysql, None);
assert!(sql.contains("ADD COLUMN `legacy` int NOT NULL"), "legacy add: {sql}");
assert!(!sql.contains(" FIRST"), "legacy diff has no position: {sql}");
assert!(!sql.contains(" AFTER "), "legacy diff has no position: {sql}");
}
#[test]
fn mysql_same_dialect_add_drop_modified() {
let diffs = make_col_diffs(
&[("id", "int"), ("new_col", "varchar(50)")],
&[("id", "bigint"), ("old_col", "int")],
false,
);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Mysql, None);
assert!(sql.contains("ADD COLUMN `new_col`"), "MySQL add: {sql}");
assert!(sql.contains("DROP COLUMN `old_col`"), "MySQL drop: {sql}");
assert!(sql.contains("MODIFY COLUMN `id`"), "MySQL modify: {sql}");
}
// -- 2. Same-dialect: PostgreSQL (double-quotes, ALTER COLUMN … TYPE) --
#[test]
fn postgresql_same_dialect_modify_and_rename() {
let diffs = make_col_diffs(
&[("id", "int"), ("name2", "varchar(120)"), ("create_at", "timestamp")],
&[("id", "int"), ("name", "varchar(120)")],
true,
);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Postgres, None);
assert!(sql.contains("RENAME COLUMN"), "PG rename: {sql}");
assert!(sql.contains("ADD COLUMN"), "PG add: {sql}");
assert!(sql.contains("\"t\""), "PG double-quote table: {sql}");
assert!(!sql.contains('`'), "PG no backticks: {sql}");
}
// -- 3. Cross-dialect type conversion: MySQL → PostgreSQL --
#[test]
fn mysql_to_postgresql_type_conversion_full() {
let diffs = make_col_diffs(
&[("id", "int(11)"), ("name2", "varchar(120)"), ("flag", "tinyint(2)"), ("ts", "datetime")],
&[("id", "integer"), ("name", "varchar(120)"), ("flag", "smallint")],
true,
);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Postgres, Some(DialectKind::Mysql));
assert!(sql.contains("RENAME COLUMN"), "PG rename: {sql}");
assert!(sql.contains("ADD COLUMN"), "PG add: {sql}");
assert!(sql.contains("INTEGER"), "int(11)→INTEGER: {sql}");
assert!(sql.contains("SMALLINT"), "tinyint→SMALLINT: {sql}");
assert!(sql.contains("TIMESTAMP"), "datetime→TIMESTAMP: {sql}");
assert!(!sql.contains('`'), "PG no backticks: {sql}");
}
#[test]
fn mysql_to_postgresql_type_conversion_modified_only() {
let diffs = make_col_diffs(
&[("id", "int(11)"), ("amount", "decimal(10,2)"), ("created", "datetime")],
&[("id", "integer"), ("amount", "numeric(10,2)"), ("created", "timestamp")],
false,
);
let sql_with = gen_sql(wrap_table_diff("t", diffs.clone()), DatabaseType::Postgres, Some(DialectKind::Mysql));
let sql_without = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Postgres, None);
assert!(sql_with.contains("INTEGER"), "with: int(11)→INTEGER: {sql_with}");
assert!(sql_with.contains("TIMESTAMP"), "with: datetime→TIMESTAMP: {sql_with}");
// No source dialect: matrix skipped, but target profile still strips display width.
assert!(sql_without.contains("INT"), "without: display width stripped: {sql_without}");
assert!(!sql_without.contains("int(11)"), "without: no MySQL display width: {sql_without}");
assert!(sql_without.contains("datetime"), "without: datetime preserved: {sql_without}");
}
// -- 4. Reverse: PostgreSQL → MySQL --
#[test]
fn postgresql_to_mysql_type_conversion_reverse() {
let diffs = make_col_diffs(
&[("id", "integer"), ("label", "text"), ("active", "boolean")],
&[("id", "int"), ("label", "varchar(255)")],
false,
);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Mysql, Some(DialectKind::Postgres));
assert!(sql.contains('`'), "MySQL backticks: {sql}");
assert!(sql.contains("MODIFY COLUMN"), "MySQL modify: {sql}");
assert!(sql.contains("LONGTEXT"), "text→LONGTEXT: {sql}");
assert!(sql.contains("TINYINT(1)"), "boolean→TINYINT(1): {sql}");
assert!(sql.contains("INT"), "integer→INT: {sql}");
}
// -- 5. MySQL → SQLite type conversion --
#[test]
fn mysql_to_sqlite_type_conversion() {
let diffs = make_col_diffs(
&[("id", "int(11)"), ("renamed", "varchar(255)")],
&[("id", "integer"), ("old", "text")],
true,
);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Sqlite, Some(DialectKind::Mysql));
assert!(sql.contains("RENAME COLUMN"), "SQLite rename: {sql}");
assert!(sql.contains("INTEGER"), "int(11)→INTEGER: {sql}");
assert!(!sql.contains('`'), "SQLite no backticks: {sql}");
}
// -- 6. Database-specific rename syntax --
#[test]
fn sqlserver_rename_uses_sp_rename() {
let diffs = make_col_diffs(
&[("id", "int"), ("new_name", "varchar(100)")],
&[("id", "int"), ("old_name", "varchar(100)")],
true,
);
let sql = gen_sql(wrap_table_diff("orders", diffs), DatabaseType::SqlServer, None);
assert!(sql.contains("sp_rename"), "SQL Server uses sp_rename: {sql}");
assert!(sql.contains("\"orders\""), "sp_rename table path: {sql}");
assert!(!sql.contains("ALTER TABLE \"orders\" EXEC sp_rename"), "sp_rename must be standalone: {sql}");
assert!(sql.lines().any(|line| line.starts_with("EXEC sp_rename")), "standalone sp_rename: {sql}");
assert!(!sql.contains('`'), "SQL Server no backticks: {sql}");
}
#[test]
fn h2_rename_uses_alter_column_rename_to() {
let diffs = make_col_diffs(
&[("id", "int"), ("new_name", "varchar(100)")],
&[("id", "int"), ("old_name", "varchar(100)")],
true,
);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::H2, None);
assert!(sql.contains("ALTER COLUMN"), "H2 ALTER COLUMN: {sql}");
assert!(sql.contains("RENAME TO"), "H2 RENAME TO: {sql}");
}
#[test]
fn default_rename_all_other_databases() {
let databases = [
DatabaseType::ClickHouse,
DatabaseType::Oracle,
DatabaseType::DuckDb,
DatabaseType::Informix,
DatabaseType::Questdb,
];
for db in databases {
let diffs = make_col_diffs(
&[("id", "int"), ("new_name", "varchar(100)")],
&[("id", "int"), ("old_name", "varchar(100)")],
true,
);
let sql = gen_sql(wrap_table_diff("t", diffs), db, None);
assert!(sql.contains("RENAME COLUMN"), "{db:?} uses RENAME COLUMN: {sql}");
assert!(!sql.contains('`'), "{db:?} no backticks: {sql}");
}
}
// -- 7. MySQL-like databases (Doris, StarRocks) --
#[test]
fn mysql_like_databases_use_mysql_syntax() {
let mysql_likes = [
DatabaseType::Doris,
DatabaseType::StarRocks,
DatabaseType::Goldendb,
DatabaseType::Sundb,
DatabaseType::Databend,
DatabaseType::Gbase,
];
for db in mysql_likes {
let diffs = make_col_diffs(
&[("id", "int"), ("name2", "varchar(50)")],
&[("id", "int"), ("name", "varchar(50)")],
true,
);
let sql = gen_sql(wrap_table_diff("t", diffs), db, None);
assert!(sql.contains('`'), "{db:?} uses backticks: {sql}");
assert!(sql.contains("CHANGE COLUMN"), "{db:?} uses CHANGE COLUMN: {sql}");
}
}
// -- 8. No type conversion for unsupported dialect pairs --
#[test]
fn mysql_to_unsupported_dialect_types_pass_through() {
let targets = [
DatabaseType::SqlServer,
DatabaseType::ClickHouse,
DatabaseType::Oracle,
DatabaseType::DuckDb,
DatabaseType::Informix,
DatabaseType::H2,
DatabaseType::Questdb,
];
for target in targets {
let diffs = make_col_diffs(
&[("id", "int(11)"), ("name2", "varchar(50)")],
&[("id", "integer"), ("name", "varchar(50)")],
true,
);
let sql = gen_sql(wrap_table_diff("t", diffs), target, Some(DialectKind::Mysql));
// No dialect-pair matrix for these targets; profile still strips MySQL display width.
assert!(sql.contains("INT"), "{target:?} strips display width to INT: {sql}");
assert!(!sql.contains("int(11)"), "{target:?} no MySQL display width: {sql}");
assert!(!sql.contains('`'), "{target:?} no backticks: {sql}");
}
}
// -- 9. Passthrough when source_dialect is None --
#[test]
fn without_source_dialect_types_preserved() {
let diffs = make_col_diffs(&[("id", "int(11)"), ("flag", "tinyint")], &[("id", "bigint")], false);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Postgres, None);
// No source dialect → no matrix mapping; PG profile still strips display width.
assert!(sql.contains("INT"), "display width stripped to INT: {sql}");
assert!(!sql.contains("int(11)"), "no MySQL display width: {sql}");
assert!(sql.contains("tinyint"), "passthrough tinyint: {sql}");
}
// -- 10. All MySQL→PostgreSQL type mapping rules --
#[test]
fn mysql_to_postgresql_specific_type_conversions() {
let cases = [
("ti1", "tinyint(1)", "BOOLEAN"),
("tiny", "tinyint", "SMALLINT"),
("med", "mediumint", "INTEGER"),
("int_", "int", "INTEGER"),
("big", "bigint", "BIGINT"),
("flt", "float", "REAL"),
("dbl", "double", "DOUBLE PRECISION"),
("txs", "tinytext", "TEXT"),
("tx", "text", "TEXT"),
("txm", "mediumtext", "TEXT"),
("txl", "longtext", "TEXT"),
("blb", "blob", "BYTEA"),
("bls", "tinyblob", "BYTEA"),
("blm", "mediumblob", "BYTEA"),
("bll", "longblob", "BYTEA"),
("dt", "datetime", "TIMESTAMP"),
];
for (name, mysql_type, expected_pg) in cases {
let diffs = make_col_diffs(&[(name, mysql_type)], &[], false);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Postgres, Some(DialectKind::Mysql));
assert!(sql.contains(expected_pg), "MySQL {mysql_type} → PostgreSQL {expected_pg}: {sql}");
}
}
// -- 11. PostgreSQL→MySQL all reverse type mappings --
#[test]
fn postgresql_to_mysql_all_type_mappings() {
let mappings = [
("sml", "smallint", "SMALLINT"),
("int_", "integer", "INT"),
("big", "bigint", "BIGINT"),
("real", "real", "FLOAT"),
("dp", "double precision", "DOUBLE"),
("tx", "text", "LONGTEXT"),
("ba", "bytea", "BLOB"),
("bl", "boolean", "TINYINT(1)"),
("ts", "timestamp", "DATETIME"),
("tstz", "timestamptz", "DATETIME"),
("uuid", "uuid", "CHAR(36)"),
("jb", "jsonb", "JSON"),
];
for (name, pg_type, expected_mysql) in mappings {
let diffs = make_col_diffs(&[(name, pg_type)], &[], false);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Mysql, Some(DialectKind::Postgres));
assert!(sql.contains(expected_mysql), "PG {pg_type} → MySQL {expected_mysql}: {sql}");
}
}
// -- 12. MySQL→SQLite all type mappings --
#[test]
fn mysql_to_sqlite_all_type_mappings() {
let mappings = [
("int", "int", "INTEGER"),
("bi", "bigint", "INTEGER"),
("ti", "tinyint", "INTEGER"),
("si", "smallint", "INTEGER"),
("mi", "mediumint", "INTEGER"),
("db", "double", "REAL"),
("fl", "float", "REAL"),
("dt", "datetime", "TEXT"),
("ts", "timestamp", "TEXT"),
("tx", "text", "TEXT"),
("bl", "blob", "BLOB"),
];
for (name, mysql_type, expected_sqlite) in mappings {
let diffs = make_col_diffs(&[(name, mysql_type)], &[], false);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Sqlite, Some(DialectKind::Mysql));
assert!(sql.contains(expected_sqlite), "MySQL {mysql_type} → SQLite {expected_sqlite}: {sql}");
}
}
// -- 13. Same-dialect: ClickHouse (double-quotes, default rename) --
#[test]
fn clickhouse_same_dialect_operations() {
let diffs = make_col_diffs(&[("id", "Int32"), ("new_col", "String")], &[("id", "Int32")], false);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::ClickHouse, None);
assert!(sql.contains("ADD COLUMN"), "ClickHouse add: {sql}");
assert!(!sql.contains('`'), "ClickHouse no backticks: {sql}");
}
// -- 14. Same-dialect: Oracle --
#[test]
fn oracle_same_dialect_operations() {
let diffs = make_col_diffs(&[("id", "NUMBER"), ("name", "VARCHAR2(100)")], &[("id", "NUMBER")], false);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Oracle, None);
assert!(sql.contains("ADD COLUMN"), "Oracle add: {sql}");
assert!(!sql.contains('`'), "Oracle no backticks: {sql}");
}
// -- 15. Same-dialect: SQL Server with rename --
#[test]
fn sqlserver_same_dialect_rename() {
let diffs = make_col_diffs(
&[("id", "int"), ("new_name", "nvarchar(100)")],
&[("id", "int"), ("old_name", "nvarchar(100)")],
true,
);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::SqlServer, None);
assert!(sql.contains("sp_rename"), "SQL Server rename: {sql}");
}
// -- 16. Same-dialect: H2 --
#[test]
fn h2_same_dialect_rename() {
let diffs = make_col_diffs(
&[("id", "INT"), ("new_name", "VARCHAR(100)")],
&[("id", "INT"), ("old_name", "VARCHAR(100)")],
true,
);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::H2, None);
assert!(sql.contains("ALTER COLUMN"), "H2 rename: {sql}");
assert!(sql.contains("RENAME TO"), "H2 rename to: {sql}");
}
// -- 17. Same-dialect: DuckDB --
#[test]
fn duckdb_same_dialect_add() {
let diffs = make_col_diffs(&[("id", "INTEGER"), ("name", "VARCHAR")], &[("id", "INTEGER")], false);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::DuckDb, None);
assert!(sql.contains("ADD COLUMN"), "DuckDB add: {sql}");
assert!(!sql.contains('`'), "DuckDB no backticks: {sql}");
}
// -- 18. Schema-qualified SQL output --
#[test]
fn schema_qualified_output() {
let diffs = make_col_diffs(&[("name2", "varchar(50)")], &[("name", "varchar(50)")], true);
let table_diff = wrap_table_diff("users", diffs);
let sql = generate_schema_sync_sql(
&[table_diff],
&[],
&[],
&[],
&[],
DatabaseType::Postgres,
Some("public"),
false,
None,
&[],
);
assert!(sql.contains("\"public\".\"users\""), "schema prefixed: {sql}");
}
#[test]
fn schema_qualified_mysql() {
let diffs = make_col_diffs(&[("name2", "varchar(50)")], &[("name", "varchar(50)")], true);
let table_diff = wrap_table_diff("users", diffs);
let sql = generate_schema_sync_sql(
&[table_diff],
&[],
&[],
&[],
&[],
DatabaseType::Mysql,
Some("mydb"),
false,
None,
&[],
);
assert!(sql.contains("`mydb`.`users`"), "schema prefixed MySQL: {sql}");
}
// -- 19. Multiple operations in one diff --
#[test]
fn multiple_concurrent_operations() {
let diffs = make_col_diffs(
&[("id", "int"), ("name2", "varchar(50)"), ("new_col", "text"), ("keep", "boolean")],
&[("id", "bigint"), ("name", "varchar(50)"), ("old_col", "int"), ("keep", "boolean")],
true,
);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Postgres, None);
assert!(sql.contains("RENAME COLUMN"), "rename: {sql}");
assert!(sql.contains("ADD COLUMN"), "add: {sql}");
assert!(sql.contains("DROP COLUMN"), "drop: {sql}");
assert!(sql.contains("ALTER COLUMN"), "modify type: {sql}");
}
#[test]
fn multiple_concurrent_operations_mysql() {
let diffs = make_col_diffs(
&[("id", "int"), ("name2", "varchar(50)"), ("new_col", "text")],
&[("id", "bigint"), ("name", "varchar(50)")],
true,
);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Mysql, None);
assert!(sql.contains("CHANGE COLUMN"), "MySQL rename: {sql}");
assert!(sql.contains("ADD COLUMN"), "MySQL add: {sql}");
assert!(sql.contains("MODIFY COLUMN"), "MySQL modify: {sql}");
}
// -- 20. All-removed and all-added edge cases --
#[test]
fn all_columns_removed() {
let diffs = make_col_diffs(&[], &[("old1", "int"), ("old2", "varchar(10)")], false);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Mysql, None);
assert_eq!(sql.matches("DROP COLUMN").count(), 2, "two drops: {sql}");
}
#[test]
fn all_columns_added() {
let diffs = make_col_diffs(&[("new1", "int"), ("new2", "varchar(10)")], &[], false);
for db in [DatabaseType::Mysql, DatabaseType::Postgres, DatabaseType::Oracle] {
let sql = gen_sql(wrap_table_diff("t", diffs.clone()), db, None);
assert_eq!(sql.matches("ADD COLUMN").count(), 2, "{db:?} two adds: {sql}");
}
}
// -- 21. Rename + type change in one column --
#[test]
fn rename_with_simultaneous_type_change() {
let diffs = make_col_diffs(
&[("id", "int"), ("new_name", "varchar(200)")],
&[("id", "int"), ("old_name", "varchar(50)")],
true,
);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Postgres, None);
assert!(sql.contains("RENAME COLUMN"), "rename: {sql}");
assert!(sql.contains("TYPE varchar(200)"), "type change: {sql}");
}
// -- 22. PostgreSQL→PostgreSQL: nullability changes --
#[test]
fn postgres_nullable_change() {
let source = vec![ColumnInfo {
name: "name".into(),
data_type: "text".into(),
is_nullable: true,
..column("name", "text", None)
}];
let target = vec![ColumnInfo {
name: "name".into(),
data_type: "text".into(),
is_nullable: false,
..column("name", "text", None)
}];
let diffs = diff_columns_with_options(&source, &target, false, false, false, 0.5);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Postgres, None);
assert!(sql.contains("DROP NOT NULL"), "nullable change: {sql}");
}
#[test]
fn postgres_not_nullable_change() {
let source = vec![ColumnInfo {
name: "name".into(),
data_type: "text".into(),
is_nullable: false,
..column("name", "text", None)
}];
let target = vec![ColumnInfo {
name: "name".into(),
data_type: "text".into(),
is_nullable: true,
..column("name", "text", None)
}];
let diffs = diff_columns_with_options(&source, &target, false, false, false, 0.5);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Postgres, None);
assert!(sql.contains("SET NOT NULL"), "not null change: {sql}");
}
// -- 23. PostgreSQL→SQLite (no existing mapping rules) --
#[test]
fn postgresql_to_sqlite_no_type_mapping() {
let diffs = make_col_diffs(&[("id", "integer"), ("data", "text"), ("ts", "timestamp")], &[], false);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Sqlite, Some(DialectKind::Postgres));
// No PG→SQLite dialect matrix, but SQLite profile type_map still rewrites affinities.
assert!(sql.contains("INTEGER"), "integer→INTEGER: {sql}");
assert!(sql.contains("TEXT"), "text/timestamp→TEXT: {sql}");
assert!(!sql.contains("timestamp"), "timestamp mapped away: {sql}");
}
// -- 24. All MySQL-like databases with rename + type change --
#[test]
fn mysql_like_rename_with_type_conversion() {
let mysql_likes: [(DatabaseType, &str); 7] = [
(DatabaseType::Mysql, "Mysql"),
(DatabaseType::Doris, "Doris"),
(DatabaseType::StarRocks, "StarRocks"),
(DatabaseType::Goldendb, "Goldendb"),
(DatabaseType::Sundb, "Sundb"),
(DatabaseType::Databend, "Databend"),
(DatabaseType::Gbase, "Gbase"),
];
for (db, label) in mysql_likes {
let diffs = make_col_diffs(
&[("id", "int(11)"), ("name2", "varchar(50)")],
&[("id", "int"), ("name", "varchar(50)")],
true,
);
let sql = gen_sql(wrap_table_diff("t", diffs), db, Some(DialectKind::Mysql));
assert!(sql.contains("CHANGE COLUMN"), "{label} CHANGE COLUMN: {sql}");
assert!(sql.contains('`'), "{label} backticks: {sql}");
assert!(sql.contains("MODIFY COLUMN"), "{label} MODIFY: {sql}");
}
}
// -- 25. Rename with nullable change --
#[test]
fn rename_with_nullable_change() {
let source = vec![ColumnInfo {
name: "new_col".into(),
data_type: "text".into(),
is_nullable: true,
..column("new_col", "text", None)
}];
let target = vec![ColumnInfo {
name: "old_col".into(),
data_type: "text".into(),
is_nullable: false,
..column("old_col", "text", None)
}];
let diffs = diff_columns_with_options(&source, &target, false, false, true, 0.5);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Postgres, None);
assert!(sql.contains("RENAME COLUMN"), "rename: {sql}");
assert!(sql.contains("DROP NOT NULL"), "nullable: {sql}");
}
// -- 26. Empty diff generates no SQL --
#[test]
fn empty_diff_generates_no_sql() {
let diffs: Vec<ColumnDiff> = vec![];
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Mysql, None);
assert_eq!(sql, "", "empty diff should generate no SQL");
let sql = gen_sql(wrap_table_diff("t", vec![]), DatabaseType::Postgres, None);
assert_eq!(sql, "", "empty diff should generate no SQL for postgres");
}
// -- 27. Databend and Gbase (MySQL-like) --
#[test]
fn databend_gbase_mysql_like() {
for db in [DatabaseType::Databend, DatabaseType::Gbase] {
let diffs = make_col_diffs(
&[("id", "int"), ("name2", "varchar(50)")],
&[("id", "int"), ("name", "varchar(50)")],
true,
);
let sql = gen_sql(wrap_table_diff("t", diffs), db, None);
assert!(sql.contains('`'), "{db:?} backticks: {sql}");
}
}
// -- 28. Postgres-compatible databases (GaussDB, openGauss, etc.) --
#[test]
fn postgres_like_databases() {
let pg_likes = [
DatabaseType::Gaussdb,
DatabaseType::Kwdb,
DatabaseType::OpenGauss,
DatabaseType::Highgo,
DatabaseType::Vastbase,
DatabaseType::Kingbase,
DatabaseType::Firebird,
DatabaseType::Redshift,
DatabaseType::Vertica,
DatabaseType::Exasol,
];
for db in pg_likes {
let diffs = make_col_diffs(
&[("id", "int"), ("name2", "varchar(50)")],
&[("id", "int"), ("name", "varchar(50)")],
true,
);
let sql = gen_sql(wrap_table_diff("t", diffs), db, None);
assert!(sql.contains("RENAME COLUMN"), "{db:?} RENAME COLUMN: {sql}");
assert!(!sql.contains('`'), "{db:?} no backticks: {sql}");
}
}
// -- 29. SQLite-compatible databases --
#[test]
fn sqlite_like_databases() {
let sqlite_likes = [DatabaseType::Rqlite, DatabaseType::Turso];
for db in sqlite_likes {
let diffs = make_col_diffs(
&[("id", "int"), ("name2", "varchar(50)")],
&[("id", "int"), ("name", "varchar(50)")],
true,
);
let sql = gen_sql(wrap_table_diff("t", diffs), db, None);
assert!(sql.contains("RENAME COLUMN"), "{db:?} RENAME COLUMN: {sql}");
assert!(!sql.contains('`'), "{db:?} no backticks: {sql}");
}
}
// -- 30. ManticoreSearch (separate dialect) --
#[test]
fn manticore_search_sql() {
let diffs = make_col_diffs(&[("id", "bigint"), ("title", "text")], &[("id", "bigint")], false);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::ManticoreSearch, None);
assert!(sql.contains("ADD COLUMN"), "Manticore add: {sql}");
assert!(sql.contains('`'), "Manticore uses backtick identifiers (MySQL-compatible): {sql}");
}
#[test]
fn detects_modified_indexes_not_only_added_or_removed_indexes() {
let diffs = diff_indexes(
&[index(IndexInfo {
name: "idx_orders_status".to_string(),
columns: vec!["status".to_string(), "created_at".to_string()],
is_unique: false,
is_primary: false,
filter: None,
index_type: None,
included_columns: None,
comment: None,
})],
&[index(IndexInfo {
name: "idx_orders_status".to_string(),
columns: vec!["status".to_string()],
is_unique: true,
is_primary: false,
filter: None,
index_type: None,
included_columns: None,
comment: None,
})],
);
assert_eq!(diffs.len(), 1);
assert_eq!(diffs[0].diff_type, "modified");
assert_eq!(diffs[0].changes, vec!["unique: YES → NO", "columns: status → status, created_at"]);
}
#[test]
fn detects_mysql_functional_index_changes_and_preserves_expression_ddl() {
let functional_key_part = "((case when (`STATUS` = _utf8mb4'online') then _utf8mb4'online' else NULL end))";
let source_index = index(IndexInfo {
name: "test_UNIQUE".to_string(),
columns: vec!["attr".to_string(), "attr2".to_string(), functional_key_part.to_string()],
is_unique: true,
is_primary: false,
filter: None,
index_type: None,
included_columns: None,
comment: None,
});
let target_index = index(IndexInfo {
name: "test_UNIQUE".to_string(),
columns: vec!["attr".to_string(), "attr2".to_string()],
is_unique: true,
is_primary: false,
filter: None,
index_type: None,
included_columns: None,
comment: None,
});
let diffs = diff_indexes(std::slice::from_ref(&source_index), &[target_index]);
assert_eq!(diffs.len(), 1);
assert_eq!(diffs[0].diff_type, "modified");
assert_eq!(diffs[0].changes, vec![format!("columns: attr, attr2 → attr, attr2, {functional_key_part}")]);
let sql = generate_schema_sync_sql(
&[TableDiff {
diff_type: "modified".to_string(),
object_type: Some("table".to_string()),
name: "test".to_string(),
columns: None,
indexes: Some(diffs),
foreign_keys: None,
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
}],
&[],
&[],
&[],
&[],
DatabaseType::Mysql,
Some("dbx_issue_4114"),
false,
None,
&[],
);
assert!(sql.contains("DROP INDEX `test_UNIQUE` ON `dbx_issue_4114`.`test`;"));
assert!(sql.contains(&format!(
"CREATE UNIQUE INDEX `test_UNIQUE` ON `dbx_issue_4114`.`test` (`attr`, `attr2`, {functional_key_part});"
)));
assert!(!sql.contains("`((case"));
}
#[test]
fn detects_foreign_key_additions_removals_and_target_changes() {
let diffs = diff_foreign_keys(
&[
foreign_key(ForeignKeyInfo {
name: "orders_user_id_fk".to_string(),
column: String::new(),
ref_schema: None,
ref_table: String::new(),
ref_column: String::new(),
on_update: None,
on_delete: None,
}),
foreign_key(ForeignKeyInfo {
name: "orders_account_id_fk".to_string(),
column: "account_id".to_string(),
ref_schema: None,
ref_table: "accounts".to_string(),
ref_column: String::new(),
on_update: None,
on_delete: None,
}),
],
&[
foreign_key(ForeignKeyInfo {
name: "orders_user_id_fk".to_string(),
column: String::new(),
ref_schema: None,
ref_table: "members".to_string(),
ref_column: String::new(),
on_update: None,
on_delete: None,
}),
foreign_key(ForeignKeyInfo {
name: "orders_region_id_fk".to_string(),
column: "region_id".to_string(),
ref_schema: None,
ref_table: "regions".to_string(),
ref_column: String::new(),
on_update: None,
on_delete: None,
}),
],
);
let summary: Vec<_> = diffs.iter().map(|diff| (diff.diff_type.as_str(), diff.name.as_str())).collect();
assert_eq!(
summary,
vec![
("modified", "orders_user_id_fk"),
("added", "orders_account_id_fk"),
("removed", "orders_region_id_fk"),
]
);
}
#[test]
fn generates_sync_sql_for_index_and_foreign_key_changes() {
let diffs = vec![TableDiff {
diff_type: "modified".to_string(),
object_type: None,
name: "orders".to_string(),
columns: None,
indexes: Some(vec![IndexDiff {
diff_type: "modified".to_string(),
name: "idx_orders_status".to_string(),
source: Some(index(IndexInfo {
name: "idx_orders_status".to_string(),
columns: vec!["status".to_string(), "created_at".to_string()],
is_unique: true,
is_primary: false,
filter: None,
index_type: None,
included_columns: None,
comment: None,
})),
target: None,
changes: Vec::new(),
}]),
foreign_keys: Some(vec![ForeignKeyDiff {
diff_type: "modified".to_string(),
name: "orders_user_id_fk".to_string(),
source: Some(foreign_key(ForeignKeyInfo {
name: "orders_user_id_fk".to_string(),
column: String::new(),
ref_schema: None,
ref_table: "users".to_string(),
ref_column: String::new(),
on_update: None,
on_delete: None,
})),
target: None,
changes: Vec::new(),
}]),
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
}];
assert_eq!(
generate_schema_sync_sql(&diffs, &[], &[], &[], &[], DatabaseType::Postgres, None, false, None, &[]),
[
"ALTER TABLE \"orders\" DROP CONSTRAINT \"orders_user_id_fk\";",
"DROP INDEX IF EXISTS \"idx_orders_status\";",
"CREATE UNIQUE INDEX \"idx_orders_status\" ON \"orders\" (\"status\", \"created_at\");",
"ALTER TABLE \"orders\" ADD CONSTRAINT \"orders_user_id_fk\" FOREIGN KEY (\"user_id\") REFERENCES \"users\" (\"id\");",
]
.join("\n")
);
}
#[test]
fn mysql_column_comment_changes_generate_modify_column_sql() {
let diffs = vec![TableDiff {
diff_type: "modified".to_string(),
object_type: None,
name: "users".to_string(),
columns: Some(vec![ColumnDiff {
diff_type: "modified".to_string(),
name: "name".to_string(),
source: Some(column("name", "varchar(64)", Some("用户姓名"))),
target: Some(column("name", "varchar(64)", Some("Name"))),
changes: vec!["comment: Name → 用户姓名".to_string()],
add_position: None,
}]),
indexes: None,
foreign_keys: None,
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: Some(Some("用户表".to_string())),
target_table_comment: Some(Some("Users".to_string())),
sync_sql: None,
}];
assert_eq!(
generate_schema_sync_sql(&diffs, &[], &[], &[], &[], DatabaseType::Mysql, None, false, None, &[]),
[
"-- Alter table: users",
"ALTER TABLE `users`",
" MODIFY COLUMN `name` varchar(64) NOT NULL COMMENT '用户姓名';",
"",
"ALTER TABLE `users` COMMENT = '用户表';",
]
.join("\n")
);
}
#[test]
fn mysql_schema_sync_sql_qualifies_tables_with_target_database() {
let diffs = vec![TableDiff {
diff_type: "modified".to_string(),
object_type: None,
name: "notify_channel_config".to_string(),
columns: Some(vec![ColumnDiff {
diff_type: "modified".to_string(),
name: "config_json".to_string(),
source: Some(column("config_json", "json", Some("渠道配置"))),
target: Some(column("config_json", "json", Some("Config"))),
changes: vec!["comment: Config → 渠道配置".to_string()],
add_position: None,
}]),
indexes: None,
foreign_keys: None,
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
}];
assert_eq!(
generate_schema_sync_sql(
&diffs,
&[],
&[],
&[],
&[],
DatabaseType::Mysql,
Some("target_db"),
false,
None,
&[]
),
[
"-- Alter table: notify_channel_config",
"ALTER TABLE `target_db`.`notify_channel_config`",
" MODIFY COLUMN `config_json` json NOT NULL COMMENT '渠道配置';",
]
.join("\n")
);
}
#[test]
fn blank_target_schema_does_not_generate_empty_qualifier() {
let diffs = vec![TableDiff {
diff_type: "modified".to_string(),
object_type: None,
name: "notify_channel_config".to_string(),
columns: Some(vec![ColumnDiff {
diff_type: "modified".to_string(),
name: "config_json".to_string(),
source: Some(column("config_json", "json", Some("渠道配置"))),
target: Some(column("config_json", "json", Some("Config"))),
changes: vec!["comment: Config → 渠道配置".to_string()],
add_position: None,
}]),
indexes: None,
foreign_keys: None,
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
}];
let sql =
generate_schema_sync_sql(&diffs, &[], &[], &[], &[], DatabaseType::Mysql, Some(" "), false, None, &[]);
assert!(sql.contains("ALTER TABLE `notify_channel_config`"));
assert!(!sql.contains("``."));
}
#[test]
fn ignore_comments_skips_column_and_table_comment_diffs() {
let options = SchemaDiffPreparationOptions {
source_tables: vec![TableInfo {
name: "users".to_string(),
table_type: "BASE TABLE".to_string(),
comment: Some("用户表".to_string()),
parent_schema: None,
parent_name: None,
}],
target_tables: vec![TableInfo {
name: "users".to_string(),
table_type: "BASE TABLE".to_string(),
comment: Some("Users".to_string()),
parent_schema: None,
parent_name: None,
}],
source_details: vec![TableSchemaDetail {
name: "users".to_string(),
columns: vec![column("name", "varchar(64)", Some("用户姓名"))],
indexes: Vec::new(),
foreign_keys: Vec::new(),
triggers: Vec::new(),
ddl: None,
}],
target_details: vec![TableSchemaDetail {
name: "users".to_string(),
columns: vec![column("name", "varchar(64)", Some("Name"))],
indexes: Vec::new(),
foreign_keys: Vec::new(),
triggers: Vec::new(),
ddl: None,
}],
source_functions: Vec::new(),
target_functions: Vec::new(),
source_sequences: Vec::new(),
target_sequences: Vec::new(),
source_rules: Vec::new(),
target_rules: Vec::new(),
source_owners: Vec::new(),
target_owners: Vec::new(),
database_type: DatabaseType::Mysql,
target_schema: None,
ignore_comments: true,
cascade_delete: false,
compare_column_order: false,
..Default::default()
};
let result = prepare_schema_diff(options);
assert!(result.diffs.is_empty());
assert!(result.sync_sql.is_empty());
}
#[test]
fn prepare_schema_diff_attaches_per_table_sync_sql() {
let options = SchemaDiffPreparationOptions {
source_tables: vec![TableInfo {
name: "users".to_string(),
table_type: "BASE TABLE".to_string(),
comment: None,
parent_schema: None,
parent_name: None,
}],
target_tables: vec![TableInfo {
name: "users".to_string(),
table_type: "BASE TABLE".to_string(),
comment: None,
parent_schema: None,
parent_name: None,
}],
source_details: vec![TableSchemaDetail {
name: "users".to_string(),
columns: vec![column("name", "varchar(128)", None)],
indexes: Vec::new(),
foreign_keys: Vec::new(),
triggers: Vec::new(),
ddl: Some("CREATE TABLE `users` (`name` varchar(128));".to_string()),
}],
target_details: vec![TableSchemaDetail {
name: "users".to_string(),
columns: vec![column("name", "varchar(64)", None)],
indexes: Vec::new(),
foreign_keys: Vec::new(),
triggers: Vec::new(),
ddl: Some("CREATE TABLE `users` (`name` varchar(64));".to_string()),
}],
source_functions: Vec::new(),
target_functions: Vec::new(),
source_sequences: Vec::new(),
target_sequences: Vec::new(),
source_rules: Vec::new(),
target_rules: Vec::new(),
source_owners: Vec::new(),
target_owners: Vec::new(),
database_type: DatabaseType::Mysql,
target_schema: None,
ignore_comments: false,
cascade_delete: false,
compare_column_order: false,
..Default::default()
};
let result = prepare_schema_diff(options);
let table_sync_sql = result.diffs[0].sync_sql.as_deref().unwrap_or_default();
assert!(table_sync_sql.contains("ALTER TABLE `users`"));
assert!(!table_sync_sql.contains("CREATE TABLE"));
}
#[test]
fn qualifies_generated_schema_sync_sql_with_target_schema() {
let diffs = vec![TableDiff {
diff_type: "modified".to_string(),
object_type: None,
name: "orders".to_string(),
columns: Some(vec![ColumnDiff {
diff_type: "added".to_string(),
name: "status".to_string(),
source: Some(ColumnInfo {
name: "status".to_string(),
data_type: "text".to_string(),
is_nullable: true,
column_default: None,
is_primary_key: false,
is_unique: false,
extra: None,
comment: None,
numeric_precision: None,
numeric_scale: None,
character_maximum_length: None,
enum_values: None,
character_set: None,
collation: None,
}),
target: None,
changes: Vec::new(),
add_position: None,
}]),
indexes: Some(vec![IndexDiff {
diff_type: "added".to_string(),
name: "idx_orders_status".to_string(),
source: Some(index(IndexInfo {
name: "idx_orders_status".to_string(),
columns: vec!["status".to_string()],
is_unique: false,
is_primary: false,
filter: None,
index_type: None,
included_columns: None,
comment: None,
})),
target: None,
changes: Vec::new(),
}]),
foreign_keys: None,
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
}];
assert_eq!(
generate_schema_sync_sql(
&diffs,
&[],
&[],
&[],
&[],
DatabaseType::Postgres,
Some("sales"),
false,
None,
&[]
),
[
"-- Alter table: orders",
"ALTER TABLE \"sales\".\"orders\" ADD COLUMN \"status\" text;",
"",
"CREATE INDEX \"idx_orders_status\" ON \"sales\".\"orders\" (\"status\");",
]
.join("\n")
);
}
// ========================================================================
// Phase 4.1: Dependency Graph Tests
// ========================================================================
#[test]
fn dependency_graph_builds_dag_from_foreign_keys() {
let details = vec![
TableSchemaDetail {
name: "orders".to_string(),
columns: vec![],
indexes: vec![],
foreign_keys: vec![ForeignKeyInfo {
name: "fk_orders_users".to_string(),
column: "user_id".to_string(),
ref_schema: None,
ref_table: "users".to_string(),
ref_column: "id".to_string(),
on_update: None,
on_delete: None,
}],
triggers: vec![],
ddl: None,
},
TableSchemaDetail {
name: "users".to_string(),
columns: vec![],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: None,
},
];
let tables = vec![
TableInfo {
name: "orders".to_string(),
table_type: "BASE TABLE".to_string(),
comment: None,
parent_schema: None,
parent_name: None,
},
TableInfo {
name: "users".to_string(),
table_type: "BASE TABLE".to_string(),
comment: None,
parent_schema: None,
parent_name: None,
},
];
let graph = DependencyGraph::build(&details, &tables);
assert_eq!(graph.nodes.len(), 2);
assert!(graph.nodes["orders"].depends_on.contains(&"users".to_string()));
assert_eq!(graph.nodes["orders"].depends_on.len(), 1);
assert_eq!(graph.nodes["users"].depends_on.len(), 0);
}
#[test]
fn dependency_graph_topological_sort_drop_order() {
let details = vec![
TableSchemaDetail {
name: "order_items".to_string(),
columns: vec![],
indexes: vec![],
foreign_keys: vec![ForeignKeyInfo {
name: "fk_items_orders".to_string(),
column: "order_id".to_string(),
ref_schema: None,
ref_table: "orders".to_string(),
ref_column: "id".to_string(),
on_update: None,
on_delete: None,
}],
triggers: vec![],
ddl: None,
},
TableSchemaDetail {
name: "orders".to_string(),
columns: vec![],
indexes: vec![],
foreign_keys: vec![ForeignKeyInfo {
name: "fk_orders_users".to_string(),
column: "user_id".to_string(),
ref_schema: None,
ref_table: "users".to_string(),
ref_column: "id".to_string(),
on_update: None,
on_delete: None,
}],
triggers: vec![],
ddl: None,
},
TableSchemaDetail {
name: "users".to_string(),
columns: vec![],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: None,
},
];
let tables = vec![
TableInfo {
name: "order_items".to_string(),
table_type: "BASE TABLE".to_string(),
comment: None,
parent_schema: None,
parent_name: None,
},
TableInfo {
name: "orders".to_string(),
table_type: "BASE TABLE".to_string(),
comment: None,
parent_schema: None,
parent_name: None,
},
TableInfo {
name: "users".to_string(),
table_type: "BASE TABLE".to_string(),
comment: None,
parent_schema: None,
parent_name: None,
},
];
let graph = DependencyGraph::build(&details, &tables);
let drop_order = graph.drop_order();
let di = drop_order.iter().position(|n| n == "order_items").unwrap();
let oi = drop_order.iter().position(|n| n == "orders").unwrap();
assert!(di < oi, "order_items should be dropped before orders");
}
#[test]
fn coverage_score_empty_graph_returns_one() {
let graph = DependencyGraph { nodes: HashMap::new(), topological_order: vec![] };
assert_eq!(graph.coverage_score(&[]), 1.0);
}
#[test]
fn coverage_score_partial_coverage() {
let mut nodes = HashMap::new();
nodes.insert(
"a".to_string(),
DependencyNode { table_name: "a".to_string(), depends_on: vec!["b".to_string()], depended_by: vec![] },
);
nodes.insert(
"b".to_string(),
DependencyNode {
table_name: "b".to_string(),
depends_on: vec!["c".to_string()],
depended_by: vec!["a".to_string()],
},
);
nodes.insert(
"c".to_string(),
DependencyNode { table_name: "c".to_string(), depends_on: vec![], depended_by: vec!["b".to_string()] },
);
let graph =
DependencyGraph { nodes, topological_order: vec!["c".to_string(), "b".to_string(), "a".to_string()] };
let score = graph.coverage_score(&["a".to_string(), "b".to_string()]);
assert!((score - 0.5).abs() < 0.01);
}
#[test]
fn coverage_score_level2_transitive_edges() {
let mut nodes = HashMap::new();
nodes.insert(
"a".to_string(),
DependencyNode { table_name: "a".to_string(), depends_on: vec!["b".to_string()], depended_by: vec![] },
);
nodes.insert(
"b".to_string(),
DependencyNode {
table_name: "b".to_string(),
depends_on: vec!["c".to_string()],
depended_by: vec!["a".to_string()],
},
);
nodes.insert(
"c".to_string(),
DependencyNode { table_name: "c".to_string(), depends_on: vec![], depended_by: vec!["b".to_string()] },
);
let graph =
DependencyGraph { nodes, topological_order: vec!["c".to_string(), "b".to_string(), "a".to_string()] };
let l2_score = graph.coverage_score_level2(&["a".to_string(), "b".to_string(), "c".to_string()]);
assert!((l2_score - 1.0).abs() < 0.01, "full coverage should give 1.0");
}
#[test]
fn coverage_score_level2_partial() {
let mut nodes = HashMap::new();
nodes.insert(
"a".to_string(),
DependencyNode { table_name: "a".to_string(), depends_on: vec!["b".to_string()], depended_by: vec![] },
);
nodes.insert(
"b".to_string(),
DependencyNode {
table_name: "b".to_string(),
depends_on: vec!["c".to_string()],
depended_by: vec!["a".to_string()],
},
);
nodes.insert(
"c".to_string(),
DependencyNode { table_name: "c".to_string(), depends_on: vec![], depended_by: vec!["b".to_string()] },
);
let graph =
DependencyGraph { nodes, topological_order: vec!["c".to_string(), "b".to_string(), "a".to_string()] };
let l2_score = graph.coverage_score_level2(&["a".to_string(), "b".to_string()]);
assert!((l2_score - 0.0).abs() < 0.01, "missing grandparent c means 0 transitive coverage");
}
#[test]
fn composite_coverage_full_coverage() {
let mut nodes = HashMap::new();
nodes.insert(
"a".to_string(),
DependencyNode { table_name: "a".to_string(), depends_on: vec!["b".to_string()], depended_by: vec![] },
);
nodes.insert(
"b".to_string(),
DependencyNode {
table_name: "b".to_string(),
depends_on: vec!["c".to_string()],
depended_by: vec!["a".to_string()],
},
);
nodes.insert(
"c".to_string(),
DependencyNode { table_name: "c".to_string(), depends_on: vec![], depended_by: vec!["b".to_string()] },
);
let graph =
DependencyGraph { nodes, topological_order: vec!["c".to_string(), "b".to_string(), "a".to_string()] };
let report = graph.composite_coverage_score(&["a".to_string(), "b".to_string(), "c".to_string()]);
assert!((report.level1_score - 1.0).abs() < 0.01);
assert!((report.level2_score - 1.0).abs() < 0.01);
assert!((report.composite_score - 1.0).abs() < 0.01);
assert_eq!(report.level1_covered, 2);
assert_eq!(report.level1_total, 2);
assert_eq!(report.level2_covered, 1);
assert_eq!(report.level2_total, 1);
}
#[test]
fn composite_coverage_partial() {
let mut nodes = HashMap::new();
nodes.insert(
"a".to_string(),
DependencyNode { table_name: "a".to_string(), depends_on: vec!["b".to_string()], depended_by: vec![] },
);
nodes.insert(
"b".to_string(),
DependencyNode {
table_name: "b".to_string(),
depends_on: vec!["c".to_string()],
depended_by: vec!["a".to_string()],
},
);
nodes.insert(
"c".to_string(),
DependencyNode { table_name: "c".to_string(), depends_on: vec![], depended_by: vec!["b".to_string()] },
);
let graph =
DependencyGraph { nodes, topological_order: vec!["c".to_string(), "b".to_string(), "a".to_string()] };
let report = graph.composite_coverage_score(&["a".to_string(), "b".to_string()]);
assert!((report.level1_score - 0.5).abs() < 0.01);
assert!((report.level2_score - 0.0).abs() < 0.01);
assert!((report.composite_score - 0.3).abs() < 0.01, "0.6*0.5 + 0.4*0.0 = 0.3");
assert_eq!(report.level1_covered, 1);
assert_eq!(report.level1_total, 2);
assert!(!report.uncovered_edges.is_empty());
}
#[test]
fn composite_coverage_no_dependencies() {
let mut nodes = HashMap::new();
nodes.insert(
"t1".to_string(),
DependencyNode { table_name: "t1".to_string(), depends_on: vec![], depended_by: vec![] },
);
nodes.insert(
"t2".to_string(),
DependencyNode { table_name: "t2".to_string(), depends_on: vec![], depended_by: vec![] },
);
let graph = DependencyGraph { nodes, topological_order: vec!["t1".to_string(), "t2".to_string()] };
let report = graph.composite_coverage_score(&["t1".to_string()]);
assert!((report.level1_score - 1.0).abs() < 0.01);
assert!((report.level2_score - 1.0).abs() < 0.01);
assert!((report.composite_score - 1.0).abs() < 0.01);
assert!(report.uncovered_edges.is_empty());
}
// ========================================================================
// Phase 4.1: Rename Detection Tests
// ========================================================================
#[test]
fn detect_renames_high_similarity_columns() {
let source_details = vec![TableSchemaDetail {
name: "users_old".to_string(),
columns: vec![
column("id", "int", None),
column("name", "varchar(100)", None),
column("email", "varchar(255)", None),
column("created_at", "datetime", None),
],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: None,
}];
let target_details = vec![TableSchemaDetail {
name: "users_new".to_string(),
columns: vec![
column("id", "integer", None),
column("name", "varchar(100)", None),
column("email", "varchar(255)", None),
column("updated_at", "datetime", None),
],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: None,
}];
let candidates = detect_renames(
&["users_new".to_string()],
&["users_old".to_string()],
&source_details,
&target_details,
0.5,
);
assert_eq!(candidates.len(), 1);
assert_eq!(candidates[0].source_name, "users_old");
assert_eq!(candidates[0].target_name, "users_new");
assert!(candidates[0].score >= 0.5);
}
#[test]
fn detect_renames_low_similarity_below_threshold() {
let source_details = vec![TableSchemaDetail {
name: "users".to_string(),
columns: vec![column("id", "int", None)],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: None,
}];
let target_details = vec![TableSchemaDetail {
name: "products".to_string(),
columns: vec![column("sku", "varchar(50)", None), column("price", "decimal", None)],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: None,
}];
let candidates =
detect_renames(&["users".to_string()], &["products".to_string()], &source_details, &target_details, 0.5);
assert!(candidates.is_empty());
}
#[test]
fn jaccard_similarity_identical_sets() {
let a: HashSet<String> = ["a", "b", "c"].iter().map(|s| s.to_string()).collect();
let b: HashSet<String> = ["a", "b", "c"].iter().map(|s| s.to_string()).collect();
assert!((jaccard_similarity(&a, &b) - 1.0).abs() < f64::EPSILON);
}
// ========================================================================
// Phase 4.2: Batch Naming Pattern Tests
// ========================================================================
#[test]
fn batch_pattern_matching_wildcard() {
let source = vec!["log_2024_01".to_string(), "log_2024_02".to_string(), "users".to_string()];
let target = vec!["log_2024_03".to_string()];
let patterns = vec![BatchPattern {
pattern: "log_*".to_string(),
is_regex: false,
description: "all log tables".to_string(),
}];
let (_added, removed, common, match_results) = diff_names_with_patterns(&source, &target, &patterns);
assert_eq!(removed, vec!["log_2024_03"]);
assert_eq!(common.len(), 0);
assert_eq!(match_results.len(), 1);
assert_eq!(match_results[0].len(), 2);
}
#[test]
fn batch_pattern_regex_matching() {
let source = vec!["tbl_001".to_string(), "tbl_002".to_string(), "other".to_string()];
let target = vec![];
let patterns = vec![BatchPattern {
pattern: r"tbl_\d{3}".to_string(),
is_regex: true,
description: "numbered tables".to_string(),
}];
let (_added, _removed, _common, match_results) = diff_names_with_patterns(&source, &target, &patterns);
assert_eq!(match_results[0].len(), 2);
}
#[test]
fn pattern_conflict_detection() {
let patterns = vec![
BatchPattern { pattern: "user_*".to_string(), is_regex: false, description: "user tables".to_string() },
BatchPattern {
pattern: "user_data".to_string(),
is_regex: false,
description: "specific user data".to_string(),
},
];
let names = vec!["user_data".to_string(), "user_log".to_string()];
let conflicts = detect_pattern_conflicts(&patterns, &names);
assert!(!conflicts.is_empty());
}
// ========================================================================
// Phase 4.3: Type Compatibility Tests
// ========================================================================
#[test]
fn diff_columns_with_compatibility_integer_family() {
let (_diffs, warnings) = diff_columns_with_compatibility(
&[column("id", "INT", None)],
&[column("id", "BIGINT", None)],
false,
false,
DialectKind::Mysql,
DialectKind::Mysql,
0.9,
&[],
);
assert!(!warnings.is_empty());
assert_eq!(warnings[0].risk, ColumnConversionRisk::Low);
}
#[test]
fn diff_columns_with_compatibility_exact_match_no_warning() {
let (_diffs, warnings) = diff_columns_with_compatibility(
&[column("id", "INT", None)],
&[column("id", "INT", None)],
false,
false,
DialectKind::Mysql,
DialectKind::Mysql,
0.5,
&[],
);
assert!(warnings.is_empty());
}
// ========================================================================
// Phase 4.4: Bidirectional Diff & Rollback Tests
// ========================================================================
fn make_diff(diff_type: &str, name: &str) -> TableDiff {
TableDiff {
diff_type: diff_type.to_string(),
object_type: Some("table".to_string()),
name: name.to_string(),
columns: None,
indexes: None,
foreign_keys: None,
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
}
}
#[test]
fn rollback_graph_add_becomes_drop() {
let diffs = vec![make_diff("added", "new_table")];
let dep_graph = DependencyGraph { nodes: HashMap::new(), topological_order: vec![] };
let graph = RollbackGraph::from_forward_diffs(&diffs, &[], &dep_graph);
assert_eq!(graph.forward_nodes.len(), 1);
assert_eq!(graph.rollback_nodes.len(), 1);
assert_eq!(graph.forward_nodes[0].table_diff.diff_type, "added");
assert_eq!(graph.rollback_nodes[0].table_diff.diff_type, "removed");
}
#[test]
fn rollback_graph_remove_becomes_add() {
let diffs = vec![make_diff("removed", "old_table")];
let dep_graph = DependencyGraph { nodes: HashMap::new(), topological_order: vec![] };
let graph = RollbackGraph::from_forward_diffs(&diffs, &[], &dep_graph);
assert_eq!(graph.rollback_nodes[0].table_diff.diff_type, "added");
assert_eq!(graph.rollback_nodes[0].table_diff.ddl, None);
}
fn rollback_removed_table_sql(
database_type: DatabaseType,
target_schema: Option<&str>,
source_dialect: Option<DialectKind>,
target_dialect: DialectKind,
table_name: &str,
table_comment: Option<&str>,
target_detail: TableSchemaDetail,
) -> SchemaDiffPreparation {
prepare_schema_diff(SchemaDiffPreparationOptions {
target_tables: vec![TableInfo {
name: table_name.to_string(),
table_type: "BASE TABLE".to_string(),
comment: table_comment.map(str::to_string),
parent_schema: None,
parent_name: None,
}],
target_details: vec![target_detail],
database_type,
target_schema: target_schema.map(str::to_string),
enable_rollback: true,
source_dialect,
target_dialect: Some(target_dialect),
..Default::default()
})
}
#[test]
fn dropped_postgres_table_rollback_preserves_structured_snapshot() {
let table_name = "Order Items";
let result = rollback_removed_table_sql(
DatabaseType::Postgres,
Some("sales"),
Some(DialectKind::Postgres),
DialectKind::Postgres,
table_name,
Some("order line history"),
TableSchemaDetail {
name: table_name.to_string(),
columns: vec![
ColumnInfo {
is_primary_key: true,
column_default: Some("gen_random_uuid()".to_string()),
..column("Item ID", "uuid", Some("stable row id"))
},
ColumnInfo {
column_default: Some("'new'::text".to_string()),
..column("Status", "text", Some("workflow state"))
},
column("User ID", "bigint", None),
],
indexes: vec![index(IndexInfo {
name: "Order Status IDX".to_string(),
columns: vec!["Status".to_string()],
is_unique: true,
is_primary: false,
filter: Some("\"Status\" <> 'deleted'".to_string()),
index_type: Some("btree".to_string()),
included_columns: Some(vec!["User ID".to_string()]),
comment: None,
})],
foreign_keys: vec![foreign_key(ForeignKeyInfo {
name: "Order User FK".to_string(),
column: "User ID".to_string(),
ref_schema: Some("auth".to_string()),
ref_table: "Users".to_string(),
ref_column: "ID".to_string(),
on_update: None,
on_delete: Some("CASCADE".to_string()),
})],
triggers: vec![],
ddl: Some("CREATE TABLE native_postgres_fallback (ignored int)".to_string()),
},
);
let rollback = result.rollback_sync_sql.unwrap();
assert!(rollback.contains("CREATE TABLE \"sales\".\"Order Items\""), "{rollback}");
assert!(rollback.contains("\"Item ID\" uuid NOT NULL DEFAULT gen_random_uuid()"), "{rollback}");
assert!(rollback.contains("PRIMARY KEY (\"Item ID\")"), "{rollback}");
assert!(rollback.contains("CREATE UNIQUE INDEX \"Order Status IDX\""), "{rollback}");
assert!(rollback.contains("USING btree"), "{rollback}");
assert!(rollback.contains("INCLUDE (\"User ID\")"), "{rollback}");
assert!(rollback.contains("WHERE \"Status\" <> 'deleted'"), "{rollback}");
assert!(rollback.contains("REFERENCES \"auth\".\"Users\"(\"ID\") ON DELETE CASCADE"), "{rollback}");
assert!(rollback.contains("COMMENT ON COLUMN \"sales\".\"Order Items\".\"Status\" IS 'workflow state'"));
assert!(rollback.contains("COMMENT ON TABLE \"sales\".\"Order Items\" IS 'order line history'"));
assert!(!rollback.contains("native_postgres_fallback"), "{rollback}");
}
#[test]
fn dropped_mysql_table_rollback_preserves_defaults_comments_indexes_and_fk() {
let table_name = "order-items";
let result = rollback_removed_table_sql(
DatabaseType::Mysql,
Some("shop"),
Some(DialectKind::Mysql),
DialectKind::Mysql,
table_name,
Some("order item history"),
TableSchemaDetail {
name: table_name.to_string(),
columns: vec![
ColumnInfo {
is_primary_key: true,
column_default: Some("(uuid())".to_string()),
..column("item-id", "varchar(36)", Some("stable item id"))
},
ColumnInfo {
column_default: Some("'new'".to_string()),
..column("status", "varchar(32)", Some("workflow state"))
},
column("user-id", "bigint", None),
],
indexes: vec![index(IndexInfo {
name: "status-index".to_string(),
columns: vec!["status".to_string()],
is_unique: true,
is_primary: false,
filter: None,
index_type: Some("BTREE".to_string()),
included_columns: None,
comment: Some("status lookup".to_string()),
})],
foreign_keys: vec![foreign_key(ForeignKeyInfo {
name: "user-fk".to_string(),
column: "user-id".to_string(),
ref_schema: Some("identity".to_string()),
ref_table: "users".to_string(),
ref_column: "id".to_string(),
on_update: Some("CASCADE".to_string()),
on_delete: Some("RESTRICT".to_string()),
})],
triggers: vec![],
ddl: Some("CREATE TABLE native_mysql_fallback (ignored int)".to_string()),
},
);
let rollback = result.rollback_sync_sql.unwrap();
assert!(rollback.contains("CREATE TABLE `shop`.`order-items`"), "{rollback}");
assert!(rollback.contains("`item-id` varchar(36) NOT NULL DEFAULT (uuid()) COMMENT 'stable item id'"));
assert!(rollback.contains("PRIMARY KEY (`item-id`)"), "{rollback}");
assert!(rollback.contains("CREATE UNIQUE INDEX `status-index` USING BTREE ON `shop`.`order-items` (`status`)"));
assert!(rollback.contains("COMMENT 'status lookup'"), "{rollback}");
assert!(rollback.contains("REFERENCES `identity`.`users`(`id`) ON DELETE RESTRICT ON UPDATE CASCADE"));
assert!(rollback.contains("ALTER TABLE `shop`.`order-items` COMMENT = 'order item history'"));
assert!(!rollback.contains("native_mysql_fallback"), "{rollback}");
}
#[test]
fn dropped_sqlite_table_rollback_preserves_quoted_pk_index_fk_and_default() {
let table_name = "select \"items";
let result = rollback_removed_table_sql(
DatabaseType::Sqlite,
None,
Some(DialectKind::Sqlite),
DialectKind::Sqlite,
table_name,
None,
TableSchemaDetail {
name: table_name.to_string(),
columns: vec![
ColumnInfo { is_primary_key: true, ..column("item \"id", "TEXT", None) },
ColumnInfo { column_default: Some("'new'".to_string()), ..column("status", "TEXT", None) },
column("parent id", "TEXT", None),
],
indexes: vec![index(IndexInfo {
name: "active status index".to_string(),
columns: vec!["status".to_string()],
is_unique: false,
is_primary: false,
filter: Some("status <> 'deleted'".to_string()),
index_type: None,
included_columns: None,
comment: None,
})],
foreign_keys: vec![foreign_key(ForeignKeyInfo {
name: "parent item fk".to_string(),
column: "parent id".to_string(),
ref_schema: None,
ref_table: "parent items".to_string(),
ref_column: "id".to_string(),
on_update: None,
on_delete: Some("SET NULL".to_string()),
})],
triggers: vec![],
ddl: Some("CREATE TABLE native_sqlite_fallback (ignored int)".to_string()),
},
);
let rollback = result.rollback_sync_sql.unwrap();
assert!(rollback.contains("CREATE TABLE \"select \"\"items\""), "{rollback}");
assert!(rollback.contains("\"item \"\"id\" TEXT NOT NULL"), "{rollback}");
assert!(rollback.contains("\"status\" TEXT NOT NULL DEFAULT 'new'"), "{rollback}");
assert!(rollback.contains("PRIMARY KEY (\"item \"\"id\")"), "{rollback}");
assert!(rollback.contains("CONSTRAINT \"parent item fk\" FOREIGN KEY (\"parent id\")"), "{rollback}");
assert!(rollback.contains("REFERENCES \"parent items\"(\"id\") ON DELETE SET NULL"), "{rollback}");
assert!(rollback.contains("CREATE INDEX \"active status index\""), "{rollback}");
assert!(rollback.contains("WHERE status <> 'deleted'"), "{rollback}");
assert!(!rollback.contains("ALTER TABLE"), "SQLite FK must be part of CREATE TABLE: {rollback}");
assert!(!rollback.contains("native_sqlite_fallback"), "{rollback}");
}
#[test]
fn dropped_table_cross_dialect_rollback_uses_target_snapshot_and_syntax() {
let result = rollback_removed_table_sql(
DatabaseType::Mysql,
Some("archive"),
Some(DialectKind::Postgres),
DialectKind::Mysql,
"Audit Log",
None,
TableSchemaDetail {
name: "Audit Log".to_string(),
columns: vec![ColumnInfo {
is_primary_key: true,
column_default: Some("0".to_string()),
..column("Event ID", "BIGINT UNSIGNED", None)
}],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: Some("CREATE TABLE native_cross_dialect_fallback (ignored int)".to_string()),
},
);
let rollback = result.rollback_sync_sql.unwrap();
assert!(rollback.contains("CREATE TABLE `archive`.`Audit Log`"), "{rollback}");
assert!(rollback.contains("`Event ID` BIGINT UNSIGNED NOT NULL DEFAULT 0 AUTO_INCREMENT"), "{rollback}");
assert!(!rollback.contains('"'), "rollback must use target MySQL quoting: {rollback}");
assert!(!rollback.contains("native_cross_dialect_fallback"), "{rollback}");
}
#[test]
fn dropped_table_rollback_uses_native_target_ddl_only_without_structured_columns() {
let result = rollback_removed_table_sql(
DatabaseType::Postgres,
Some("archive"),
Some(DialectKind::Postgres),
DialectKind::Postgres,
"legacy_table",
None,
TableSchemaDetail {
name: "legacy_table".to_string(),
columns: vec![],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: Some("CREATE TABLE \"archive\".\"legacy_table\" (\"id\" bigint PRIMARY KEY)".to_string()),
},
);
let rollback = result.rollback_sync_sql.unwrap();
assert!(rollback.contains("-- Recreate table from native target DDL: legacy_table"));
assert!(rollback.contains("CREATE TABLE \"archive\".\"legacy_table\" (\"id\" bigint PRIMARY KEY);"));
assert!(!rollback.contains("CREATE TABLE \"archive\".\"legacy_table\" (\n \n)"), "{rollback}");
}
#[test]
fn dropped_table_incomplete_trigger_sets_structured_missing_objects() {
let result = rollback_removed_table_sql(
DatabaseType::Mysql,
None,
Some(DialectKind::Mysql),
DialectKind::Mysql,
"orders",
None,
TableSchemaDetail {
name: "orders".to_string(),
columns: vec![column("id", "int", None)],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![crate::types::TriggerInfo {
name: "trg_orders".to_string(),
event: "INSERT".to_string(),
timing: "AFTER".to_string(),
level: None,
condition: None,
language: None,
enabled: None,
valid: None,
comment: None,
created_at: None,
statement: None,
}],
ddl: None,
},
);
assert_eq!(result.rollback_completeness, RollbackCompleteness::Incomplete);
assert!(!result.missing_rollback_objects.is_empty());
assert_eq!(result.missing_rollback_objects[0].kind, "trigger");
assert_eq!(result.missing_rollback_objects[0].name, "trg_orders");
assert!(result.missing_rollback_objects[0].table.as_deref() == Some("orders"));
}
#[test]
fn rollback_graph_modified_stays_modified_swapped() {
let source_col = column("name", "varchar(100)", None);
let target_col = column("name", "varchar(50)", None);
let diffs = vec![TableDiff {
diff_type: "modified".to_string(),
object_type: Some("table".to_string()),
name: "users".to_string(),
columns: Some(vec![ColumnDiff {
diff_type: "modified".to_string(),
name: "name".to_string(),
source: Some(source_col.clone()),
target: Some(target_col.clone()),
changes: vec!["type: varchar(50) → varchar(100)".to_string()],
add_position: None,
}]),
indexes: None,
foreign_keys: None,
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
}];
let dep_graph = DependencyGraph { nodes: HashMap::new(), topological_order: vec![] };
let graph = RollbackGraph::from_forward_diffs(&diffs, &[], &dep_graph);
let rollback = &graph.rollback_nodes[0];
assert_eq!(rollback.table_diff.diff_type, "modified");
let rb_cols = rollback.table_diff.columns.as_ref().unwrap();
assert_eq!(rb_cols[0].diff_type, "modified");
assert_eq!(rb_cols[0].source.as_ref().unwrap().data_type, "varchar(50)");
assert_eq!(rb_cols[0].target.as_ref().unwrap().data_type, "varchar(100)");
}
#[test]
fn rollback_consistency_validation() {
let diffs = vec![make_diff("added", "t1"), make_diff("removed", "t2")];
let dep_graph = DependencyGraph { nodes: HashMap::new(), topological_order: vec![] };
let mut graph = RollbackGraph::from_forward_diffs(&diffs, &[], &dep_graph);
assert!(graph.validate_consistency());
assert!(graph.consistency_issues.is_empty());
}
// ========================================================================
// Phase 4.6: Permission Tests
// ========================================================================
#[test]
fn diff_permissions_detects_added_and_removed() {
let source = vec![PermissionInfo {
grantee: "app_user".to_string(),
object_type: "TABLE".to_string(),
object_name: "orders".to_string(),
privilege: "SELECT".to_string(),
is_grantable: false,
}];
let target = vec![PermissionInfo {
grantee: "app_user".to_string(),
object_type: "TABLE".to_string(),
object_name: "orders".to_string(),
privilege: "INSERT".to_string(),
is_grantable: false,
}];
let diffs = diff_permissions(&source, &target);
assert_eq!(diffs.len(), 2);
assert!(diffs.iter().any(|d| d.diff_type == "added"));
assert!(diffs.iter().any(|d| d.diff_type == "removed"));
}
#[test]
fn generate_permission_sql_mysql() {
let diffs = vec![PermissionDiff {
diff_type: "added".to_string(),
grantee: "app_user".to_string(),
object_name: "orders".to_string(),
privilege: "SELECT".to_string(),
source: Some(PermissionInfo {
grantee: "app_user".to_string(),
object_type: "TABLE".to_string(),
object_name: "orders".to_string(),
privilege: "SELECT".to_string(),
is_grantable: true,
}),
target: None,
}];
let sql = generate_permission_sync_sql(&diffs, DatabaseType::Mysql, Some("mydb"));
assert!(sql.contains("GRANT SELECT ON `mydb`.`orders` TO 'app_user' WITH GRANT OPTION"));
}
#[test]
fn generate_permission_sql_postgres_revoke() {
let diffs = vec![PermissionDiff {
diff_type: "removed".to_string(),
grantee: "old_user".to_string(),
object_name: "users".to_string(),
privilege: "INSERT".to_string(),
source: None,
target: Some(PermissionInfo {
grantee: "old_user".to_string(),
object_type: "TABLE".to_string(),
object_name: "users".to_string(),
privilege: "INSERT".to_string(),
is_grantable: false,
}),
}];
let sql = generate_permission_sync_sql(&diffs, DatabaseType::Postgres, Some("public"));
assert!(sql.contains("REVOKE INSERT ON TABLE \"public\".\"users\" FROM \"old_user\""));
}
// ========================================================================
// Phase 4.7: Resource Scheduling Tests
// ========================================================================
#[test]
fn adaptive_scheduler_optimal_batch_size() {
let constraint = ResourceConstraint::default();
let scheduler = AdaptiveScheduler::new(constraint, 400);
let batch = scheduler.optimal_batch_size();
assert!(batch > 0);
assert!(batch <= 50);
}
#[test]
fn adaptive_scheduler_shard_count() {
let constraint = ResourceConstraint::default();
let scheduler = AdaptiveScheduler::new(constraint, 200);
let count = scheduler.recommended_shard_count();
assert!(count >= 1);
assert!(count <= 4);
}
// ========================================================================
// Phase 4.8: Backward Compatibility Tests
// ========================================================================
#[test]
fn new_options_default_values_do_not_affect_basic_diff() {
let options = SchemaDiffPreparationOptions::default();
let result = prepare_schema_diff(options);
assert!(result.diffs.is_empty());
assert!(result.sync_sql.is_empty());
assert!(result.rollback_sync_sql.is_none());
assert!(result.rename_candidates.is_empty());
assert!(result.rollback_graph.is_none());
assert!(result.compatibility_warnings.is_empty());
assert!(result.permission_diffs.is_empty());
}
#[test]
fn prepare_schema_diff_with_rename_detection() {
let options = SchemaDiffPreparationOptions {
source_tables: vec![TableInfo {
name: "users_old".to_string(),
table_type: "BASE TABLE".to_string(),
comment: None,
parent_schema: None,
parent_name: None,
}],
target_tables: vec![TableInfo {
name: "users_new".to_string(),
table_type: "BASE TABLE".to_string(),
comment: None,
parent_schema: None,
parent_name: None,
}],
source_details: vec![TableSchemaDetail {
name: "users_old".to_string(),
columns: vec![column("id", "int", None), column("name", "varchar(100)", None)],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: None,
}],
target_details: vec![TableSchemaDetail {
name: "users_new".to_string(),
columns: vec![column("id", "int", None), column("name", "varchar(100)", None)],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: None,
}],
source_functions: vec![],
target_functions: vec![],
source_sequences: vec![],
target_sequences: vec![],
source_rules: vec![],
target_rules: vec![],
source_owners: vec![],
target_owners: vec![],
database_type: DatabaseType::Mysql,
target_schema: None,
ignore_comments: false,
cascade_delete: false,
compare_column_order: false,
detect_renames: true,
detect_table_renames: true,
rename_threshold: 0.5,
..Default::default()
};
let result = prepare_schema_diff(options);
assert!(!result.rename_candidates.is_empty());
assert!(result.rename_candidates[0].score >= 0.5);
}
#[test]
fn prepare_schema_diff_with_rollback_generates_rollback_sql() {
let options = SchemaDiffPreparationOptions {
source_tables: vec![TableInfo {
name: "new_table".to_string(),
table_type: "BASE TABLE".to_string(),
comment: None,
parent_schema: None,
parent_name: None,
}],
target_tables: vec![],
source_details: vec![TableSchemaDetail {
name: "new_table".to_string(),
columns: vec![column("id", "int", None)],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: Some("CREATE TABLE new_table (id int);".to_string()),
}],
target_details: vec![],
source_functions: vec![],
target_functions: vec![],
source_sequences: vec![],
target_sequences: vec![],
source_rules: vec![],
target_rules: vec![],
source_owners: vec![],
target_owners: vec![],
database_type: DatabaseType::Mysql,
target_schema: None,
ignore_comments: false,
cascade_delete: false,
compare_column_order: false,
enable_rollback: true,
..Default::default()
};
let result = prepare_schema_diff(options);
assert!(result.rollback_sync_sql.is_some());
assert!(result.rollback_graph.is_some());
let graph = result.rollback_graph.unwrap();
assert!(graph.is_consistent);
assert_eq!(graph.forward_nodes.len(), 1);
assert_eq!(graph.rollback_nodes.len(), 1);
assert_eq!(graph.rollback_nodes[0].table_diff.diff_type, "removed");
}
// -- 31. column_type_similarity_score unit tests --
#[test]
fn column_type_similarity_exact_match() {
assert_eq!(column_type_similarity_score("int", "int"), 1.0);
assert_eq!(column_type_similarity_score("VARCHAR(255)", "varchar(255)"), 1.0);
assert_eq!(column_type_similarity_score("datetime", "datetime"), 1.0);
}
#[test]
fn column_type_similarity_synonym() {
assert_eq!(column_type_similarity_score("int", "integer"), 1.0);
assert_eq!(column_type_similarity_score("boolean", "bool"), 1.0);
assert_eq!(column_type_similarity_score("datetime", "timestamp"), 1.0);
assert_eq!(column_type_similarity_score("double", "double precision"), 1.0);
}
#[test]
fn column_type_similarity_family() {
assert_eq!(column_type_similarity_score("tinyint", "bigint"), 0.8);
assert_eq!(column_type_similarity_score("char", "text"), 0.8);
assert_eq!(column_type_similarity_score("mediumtext", "clob"), 0.8);
}
#[test]
fn column_type_similarity_unrelated() {
assert_eq!(column_type_similarity_score("int", "varchar"), 0.0);
assert_eq!(column_type_similarity_score("boolean", "text"), 0.0);
assert_eq!(column_type_similarity_score("blob", "date"), 0.0);
}
#[test]
fn column_type_similarity_parameterized_ignored() {
assert_eq!(column_type_similarity_score("int(11)", "int(11)"), 1.0);
assert_eq!(column_type_similarity_score("int(11)", "integer"), 1.0);
assert_eq!(column_type_similarity_score("varchar(255)", "varchar(64)"), 1.0);
}
// -- 32. Multiple renames in one table --
#[test]
fn multiple_renames_in_one_table() {
let diffs = make_col_diffs(
&[("id", "int"), ("new_a", "varchar(50)"), ("new_b", "int")],
&[("id", "int"), ("old_a", "varchar(50)"), ("old_b", "int")],
true,
);
let renamed: Vec<_> = diffs.iter().filter(|d| d.diff_type == "renamed").collect();
assert_eq!(renamed.len(), 2, "should detect two renames: {renamed:?}");
assert_eq!(renamed[0].name, "new_a");
assert_eq!(renamed[1].name, "new_b");
}
#[test]
fn multiple_renames_sql() {
let diffs = make_col_diffs(
&[("id", "int"), ("new_a", "varchar(50)"), ("new_b", "int")],
&[("id", "int"), ("old_a", "varchar(50)"), ("old_b", "int")],
true,
);
for (db, label) in [(DatabaseType::Mysql, "MySQL"), (DatabaseType::Postgres, "PG")] {
let sql = gen_sql(wrap_table_diff("t", diffs.clone()), db, None);
// Two renames → two CHANGE COLUMN / RENAME COLUMN operations
let _n: u64 = 2;
assert!(sql.contains("COLUMN"), "{label}: {sql}");
}
}
// -- 33. Rename threshold edge cases --
#[test]
fn rename_threshold_zero_detects_all() {
let s: Vec<ColumnInfo> = vec![column("a", "int", None), column("b2", "varchar(10)", None)];
let t: Vec<ColumnInfo> = vec![column("a", "int", None), column("b1", "varchar(10)", None)];
// rename detection is skipped when threshold <= 0.0, use a tiny threshold
let diffs = diff_columns_with_options(&s, &t, false, false, true, 0.001);
let renamed: Vec<_> = diffs.iter().filter(|d| d.diff_type == "renamed").collect();
assert_eq!(renamed.len(), 1, "threshold near-zero should detect: {renamed:?}");
}
#[test]
fn rename_threshold_one_detects_exact_only() {
let s: Vec<ColumnInfo> = vec![column("a", "varchar(10)", None), column("b2", "text", None)];
let t: Vec<ColumnInfo> = vec![column("a", "varchar(10)", None), column("b1", "varchar(10)", None)];
let diffs = diff_columns_with_options(&s, &t, false, false, true, 1.0);
let renamed: Vec<_> = diffs.iter().filter(|d| d.diff_type == "renamed").collect();
assert_eq!(renamed.len(), 0, "threshold 1 should not match text≠varchar: {renamed:?}");
}
#[test]
fn rename_threshold_mid_detects_family_only() {
let s: Vec<ColumnInfo> = vec![column("a", "tinyint", None), column("b2", "int", None)];
let t: Vec<ColumnInfo> = vec![column("a", "tinyint", None), column("b1", "bigint", None)];
let diffs = diff_columns_with_options(&s, &t, false, false, true, 0.9);
let renamed: Vec<_> = diffs.iter().filter(|d| d.diff_type == "renamed").collect();
assert_eq!(renamed.len(), 0, "threshold 0.9 should not match tinyint≠bigint: {renamed:?}");
let diffs2 = diff_columns_with_options(&s, &t, false, false, true, 0.5);
let renamed2: Vec<_> = diffs2.iter().filter(|d| d.diff_type == "renamed").collect();
assert_eq!(renamed2.len(), 1, "threshold 0.5 should detect integer family: {renamed2:?}");
}
// -- 34. Default value changes --
#[test]
fn default_value_change_mysql() {
let source = vec![ColumnInfo { column_default: Some("'guest'".into()), ..column("name", "varchar(50)", None) }];
let target = vec![ColumnInfo { column_default: None, ..column("name", "varchar(50)", None) }];
let diffs = diff_columns_with_options(&source, &target, false, false, false, 0.5);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Mysql, None);
assert!(sql.contains("MODIFY COLUMN"), "default change: {sql}");
}
#[test]
fn default_value_change_postgres() {
let source = vec![ColumnInfo { column_default: Some("'guest'".into()), ..column("name", "varchar(50)", None) }];
let target = vec![ColumnInfo { column_default: None, ..column("name", "varchar(50)", None) }];
let diffs = diff_columns_with_options(&source, &target, false, false, false, 0.5);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Postgres, None);
assert!(sql.contains("SET DEFAULT"), "default add: {sql}");
}
#[test]
fn default_value_drop_postgres() {
let source = vec![ColumnInfo { column_default: None, ..column("name", "varchar(50)", None) }];
let target = vec![ColumnInfo { column_default: Some("'old'".into()), ..column("name", "varchar(50)", None) }];
let diffs = diff_columns_with_options(&source, &target, false, false, false, 0.5);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Postgres, None);
assert!(sql.contains("DROP DEFAULT"), "default drop: {sql}");
}
#[test]
fn added_varchar_column_quotes_a_bare_default_mysql() {
// MySQL's information_schema returns a string default unquoted, so the
// generated DDL read `DEFAULT THE_VALUE` and the deploy failed.
let source =
vec![ColumnInfo { column_default: Some("THE_VALUE".into()), ..column("menu_type", "varchar(64)", None) }];
let target: Vec<ColumnInfo> = vec![];
let diffs = diff_columns_with_options(&source, &target, false, false, false, 0.5);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Mysql, None);
assert!(sql.contains("DEFAULT 'THE_VALUE'"), "bare default must be quoted: {sql}");
}
#[test]
fn default_literal_only_quotes_bare_values_that_need_it() {
use DialectKind::Mysql;
// MySQL strips the quotes from a string default, which is the whole
// reason this function exists.
assert_eq!(default_literal("THE_VALUE", "varchar(64)", Mysql, None), "'THE_VALUE'");
assert_eq!(default_literal("it's", "text", Mysql, None), "'it''s'");
assert_eq!(default_literal("2024-01-01", "date", Mysql, None), "'2024-01-01'");
// `DEFAULT ''` previously emitted a bare `DEFAULT `.
assert_eq!(default_literal("", "varchar(20)", Mysql, None), "''");
// Untouched on MySQL: already quoted and numeric values.
assert_eq!(default_literal("'guest'", "varchar(50)", Mysql, None), "'guest'");
assert_eq!(default_literal("0", "bigint", Mysql, None), "0");
assert_eq!(default_literal("NULL", "varchar(10)", Mysql, None), "'NULL'");
assert_eq!(default_literal("null", "text", Mysql, None), "'null'");
assert_eq!(default_literal(" spaced ", "varchar(32)", Mysql, None), "' spaced '");
}
#[test]
fn default_literal_uses_mysql_extra_to_tell_an_expression_from_a_string() {
use DialectKind::Mysql;
// 8.0.13+ marks an expression default in EXTRA, and that marker decides
// it. Without the marker the value is a string, parentheses and all,
// so a column declared `DEFAULT 'a(b)'` stops emitting invalid
// `DEFAULT a(b)`.
assert_eq!(default_literal("a(b)", "varchar(32)", Mysql, None), "'a(b)'");
assert_eq!(default_literal("uuid()", "varchar(36)", Mysql, Some("DEFAULT_GENERATED")), "uuid()");
// MySQL wraps an expression default in parentheses and reports it that
// way, so the wrapping identifies it even when EXTRA is missing. That is
// a different question from whether the value contains a parenthesis,
// which is what `a(b)` above turns on.
assert_eq!(default_literal("(uuid())", "varchar(36)", Mysql, None), "(uuid())");
assert_eq!(default_literal("(now())", "datetime", Mysql, None), "(now())");
assert_eq!(
default_literal(
"CURRENT_TIMESTAMP",
"datetime",
Mysql,
Some("DEFAULT_GENERATED on update CURRENT_TIMESTAMP")
),
"CURRENT_TIMESTAMP"
);
// Before 8.0.13 there is no marker, and a temporal column was the only
// place an expression default could appear.
assert_eq!(default_literal("CURRENT_TIMESTAMP", "datetime", Mysql, None), "CURRENT_TIMESTAMP");
}
#[test]
fn default_literal_keeps_temporal_defaults_that_carry_a_precision() {
use DialectKind::Mysql;
// `TIMESTAMP(6) DEFAULT CURRENT_TIMESTAMP(6)` is valid MySQL. On a server
// older than 8.0.13 it arrives with no EXTRA marker, so the fallback has
// to accept the precision argument or the column is deployed with a
// quoted string where an expression belongs.
assert_eq!(default_literal("CURRENT_TIMESTAMP(6)", "timestamp(6)", Mysql, None), "CURRENT_TIMESTAMP(6)");
assert_eq!(default_literal("NOW()", "datetime", Mysql, None), "NOW()");
assert_eq!(default_literal("LOCALTIME(3)", "datetime(3)", Mysql, None), "LOCALTIME(3)");
assert_eq!(default_literal("LOCALTIMESTAMP(3)", "timestamp(3)", Mysql, None), "LOCALTIMESTAMP(3)");
assert_eq!(default_literal("current_timestamp(6)", "timestamp(6)", Mysql, None), "current_timestamp(6)");
// The precision form must not become a general "contains a parenthesis"
// rule again: a string default keeps its quotes.
assert_eq!(default_literal("a(b)", "varchar(32)", Mysql, None), "'a(b)'");
assert_eq!(default_literal("CURRENT_TIMESTAMPX(6)", "varchar(64)", Mysql, None), "'CURRENT_TIMESTAMPX(6)'");
}
#[test]
fn default_literal_leaves_non_mysql_expressions_alone() {
use DialectKind::{Oracle, Postgres, SqlServer};
// These dialects return a string default already quoted, so a bare token
// is an expression. Quoting it would silently turn a per-row value into
// a fixed string.
assert_eq!(default_literal("CURRENT_USER", "text", Postgres, None), "CURRENT_USER");
assert_eq!(default_literal("USER", "varchar2(30)", Oracle, None), "USER");
assert_eq!(default_literal("'new'::text", "text", Postgres, None), "'new'::text");
assert_eq!(default_literal("nextval('s'::regclass)", "integer", Postgres, None), "nextval('s'::regclass)");
assert_eq!(default_literal("N'guest'", "nvarchar(50)", SqlServer, None), "N'guest'");
assert_eq!(default_literal("('x')", "varchar(10)", SqlServer, None), "('x')");
assert_eq!(default_literal("NULL", "text", Postgres, None), "NULL");
// The same bare token on MySQL is a string, which is why the rule has to
// follow the source dialect rather than the value.
assert_eq!(default_literal("CURRENT_USER", "text", DialectKind::Mysql, None), "'CURRENT_USER'");
}
#[test]
fn default_literal_handles_set_and_binary_boundaries() {
use DialectKind::Mysql;
// A SET default is a bare comma-separated string.
assert_eq!(default_literal("a,b", "set('a','b')", Mysql, None), "'a,b'");
assert_eq!(default_literal("", "set('a','b')", Mysql, None), "''");
// Binary defaults arrive as a hex literal, which is already valid
// unquoted; a bare string on the same column still needs quoting.
assert_eq!(default_literal("0x61", "varbinary(16)", Mysql, None), "0x61");
assert_eq!(default_literal("abc", "binary(3)", Mysql, None), "'abc'");
assert_eq!(default_literal("x'1f'", "blob", Mysql, None), "x'1f'");
// Not hex, so not a hex literal.
assert_eq!(default_literal("0xzz", "varbinary(8)", Mysql, None), "'0xzz'");
}
// -- 35. Column order changes --
#[test]
fn column_order_change_only_no_type_change() {
let source = vec![column("id", "int", None), column("name", "text", None), column("age", "int", None)];
let target = vec![column("age", "int", None), column("name", "text", None), column("id", "int", None)];
let diffs = diff_columns_with_options(&source, &target, false, true, false, 0.5);
assert!(!diffs.is_empty(), "should detect order changes");
assert!(diffs.iter().all(|d| d.diff_type == "modified"), "all should be modified");
assert!(diffs.iter().all(|d| d.changes.iter().any(|c| c.starts_with("order:"))), "all order changes");
}
#[test]
fn column_order_changes_with_source_dialect() {
let source = vec![column("id", "int(11)", None), column("name", "varchar(50)", None)];
let target = vec![column("name", "text", None), column("id", "int", None)];
let diffs = diff_columns_with_options(&source, &target, false, true, false, 0.5);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Postgres, Some(DialectKind::Mysql));
assert!(sql.contains("INTEGER"), "type converted: {sql}");
}
// -- 36. prepare_schema_diff integration with source_dialect --
#[test]
fn prepare_schema_diff_with_source_dialect() {
let options = SchemaDiffPreparationOptions {
source_tables: vec![TableInfo {
name: "users".into(),
table_type: "BASE TABLE".into(),
comment: None,
parent_schema: None,
parent_name: None,
}],
target_tables: vec![TableInfo {
name: "users".into(),
table_type: "BASE TABLE".into(),
comment: None,
parent_schema: None,
parent_name: None,
}],
source_details: vec![TableSchemaDetail {
name: "users".into(),
columns: vec![column("name2", "varchar(100)", None), column("id", "int(11)", None)],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: None,
}],
target_details: vec![TableSchemaDetail {
name: "users".into(),
columns: vec![column("name", "varchar(100)", None), column("id", "int", None)],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: None,
}],
database_type: DatabaseType::Mysql,
target_schema: None,
ignore_comments: false,
cascade_delete: false,
compare_column_order: false,
detect_renames: true,
detect_table_renames: false,
rename_threshold: 0.5,
enable_rollback: false,
source_dialect: Some(DialectKind::Mysql),
target_dialect: Some(DialectKind::Mysql),
..Default::default()
};
let result = prepare_schema_diff(options);
assert!(!result.diffs.is_empty(), "should have diffs");
let sql = &result.sync_sql;
assert!(sql.contains("CHANGE COLUMN"), "detected rename: {sql}");
assert!(!sql.contains("DROP COLUMN"), "no false drop: {sql}");
}
#[test]
fn prepare_schema_diff_integration_cross_dialect() {
let options = SchemaDiffPreparationOptions {
source_tables: vec![TableInfo {
name: "t".into(),
table_type: "BASE TABLE".into(),
comment: None,
parent_schema: None,
parent_name: None,
}],
target_tables: vec![TableInfo {
name: "t".into(),
table_type: "BASE TABLE".into(),
comment: None,
parent_schema: None,
parent_name: None,
}],
source_details: vec![TableSchemaDetail {
name: "t".into(),
columns: vec![column("flag", "tinyint", None), column("name2", "varchar(50)", None)],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: None,
}],
target_details: vec![TableSchemaDetail {
name: "t".into(),
columns: vec![column("flag", "smallint", None), column("name", "varchar(50)", None)],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: None,
}],
database_type: DatabaseType::Postgres,
detect_renames: true,
rename_threshold: 0.5,
source_dialect: Some(DialectKind::Mysql),
target_dialect: Some(DialectKind::Postgres),
..Default::default()
};
let result = prepare_schema_diff(options);
let sql = &result.sync_sql;
assert!(sql.contains("RENAME COLUMN"), "PG rename: {sql}");
assert!(sql.contains("SMALLINT"), "tinyint→SMALLINT: {sql}");
assert!(!sql.contains('`'), "PG no backticks: {sql}");
}
// -- 37. Index + column rename combined --
#[test]
fn index_and_rename_combined() {
let col_diffs =
make_col_diffs(&[("id", "int"), ("name2", "varchar(50)")], &[("id", "int"), ("name", "varchar(50)")], true);
let table_diff = TableDiff {
diff_type: "modified".to_string(),
object_type: Some("table".to_string()),
name: "t".to_string(),
columns: Some(col_diffs),
indexes: Some(vec![IndexDiff {
diff_type: "added".to_string(),
name: "idx_name".to_string(),
source: Some(index(IndexInfo {
name: "idx_name".to_string(),
columns: vec!["name2".to_string()],
is_unique: false,
is_primary: false,
filter: None,
index_type: None,
included_columns: None,
comment: None,
})),
target: None,
changes: vec![],
}]),
foreign_keys: None,
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
};
let sql =
generate_schema_sync_sql(&[table_diff], &[], &[], &[], &[], DatabaseType::Postgres, None, false, None, &[]);
assert!(sql.contains("RENAME COLUMN"), "rename: {sql}");
assert!(sql.contains("CREATE INDEX"), "index: {sql}");
}
#[test]
fn index_and_rename_combined_mysql() {
let col_diffs =
make_col_diffs(&[("id", "int"), ("name2", "varchar(50)")], &[("id", "int"), ("name", "varchar(50)")], true);
let table_diff = TableDiff {
diff_type: "modified".to_string(),
object_type: Some("table".to_string()),
name: "t".to_string(),
columns: Some(col_diffs),
indexes: Some(vec![IndexDiff {
diff_type: "removed".to_string(),
name: "idx_old".to_string(),
source: None,
target: Some(index(IndexInfo {
name: "idx_old".to_string(),
columns: vec!["name".to_string()],
is_unique: false,
is_primary: false,
filter: None,
index_type: None,
included_columns: None,
comment: None,
})),
changes: vec![],
}]),
foreign_keys: None,
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
};
let sql =
generate_schema_sync_sql(&[table_diff], &[], &[], &[], &[], DatabaseType::Mysql, None, false, None, &[]);
assert!(sql.contains("CHANGE COLUMN"), "rename: {sql}");
assert!(sql.contains("DROP INDEX"), "drop index: {sql}");
}
// -- 38. diff_columns_with_compatibility cross-dialect --
#[test]
fn diff_columns_with_compatibility_cross_dialect() {
let source = vec![column("id", "int(11)", None)];
let target = vec![column("id", "integer", None)];
let (_diffs, warnings) = diff_columns_with_compatibility(
&source,
&target,
false,
false,
DialectKind::Mysql,
DialectKind::Postgres,
0.5,
&[],
);
// int(11)→integer should be compatible
let has_warning = warnings.iter().any(|w| w.column_name == "id");
assert!(!has_warning, "int(11)→integer should be compatible");
}
#[test]
fn diff_columns_with_compatibility_warning() {
let source = vec![column("id", "int", None)];
let target = vec![column("id", "text", None)];
let (_diffs, warnings) = diff_columns_with_compatibility(
&source,
&target,
false,
false,
DialectKind::Mysql,
DialectKind::Postgres,
0.9,
&[],
);
let has_warning = warnings.iter().any(|w| w.column_name == "id");
assert!(has_warning, "int→text should generate warning");
}
// -- 39. Type mapping prefix matching edge cases --
#[test]
fn convert_type_prefix_matches_parameterized() {
use crate::sql_dialect::descriptor::TypeMappingMatrix;
let matrix = TypeMappingMatrix::for_dialects(DialectKind::Mysql, DialectKind::Postgres);
let (result, _) = matrix.convert_type("tinyint(1)");
assert_eq!(result, "BOOLEAN", "tinyint(1) → BOOLEAN");
// tinyint(4) matches TINYINT prefix rule → SMALLINT (not BOOLEAN)
let (result, _) = matrix.convert_type("tinyint(4)");
assert_eq!(result, "SMALLINT", "tinyint(4) → SMALLINT");
}
#[test]
fn convert_type_unknown_type_passthrough() {
use crate::sql_dialect::descriptor::TypeMappingMatrix;
let matrix = TypeMappingMatrix::for_dialects(DialectKind::Mysql, DialectKind::Postgres);
let (result, requires_cast) = matrix.convert_type("geometry");
assert_eq!(result, "geometry", "unknown type passthrough");
assert!(requires_cast, "unknown type requires cast");
}
#[test]
fn convert_type_empty_string() {
use crate::sql_dialect::descriptor::TypeMappingMatrix;
let matrix = TypeMappingMatrix::for_dialects(DialectKind::Mysql, DialectKind::Postgres);
let (result, _) = matrix.convert_type("");
assert_eq!(result, "", "empty string passthrough");
}
// -- 40. Rollback SQL with column renames --
#[test]
fn rollback_graph_with_renames() {
let diffs = vec![TableDiff {
diff_type: "modified".to_string(),
object_type: Some("table".to_string()),
name: "t".to_string(),
columns: Some(vec![ColumnDiff {
diff_type: "renamed".to_string(),
name: "new_name".to_string(),
source: Some(column("new_name", "varchar(50)", None)),
target: Some(column("old_name", "varchar(50)", None)),
changes: vec!["old_name → new_name".to_string()],
add_position: None,
}]),
indexes: None,
foreign_keys: None,
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
}];
let dep_graph = DependencyGraph::build(&[], &[]);
let graph = RollbackGraph::from_forward_diffs(&diffs, &[], &dep_graph);
let rollback_sql = generate_rollback_sync_sql(&graph, DatabaseType::Mysql, None, false);
assert!(
rollback_sql.contains("CHANGE COLUMN `new_name` `old_name`"),
"rollback should reverse rename: {rollback_sql}"
);
}
#[test]
fn rollback_with_cross_dialect_type_conversion() {
let diffs = vec![TableDiff {
diff_type: "modified".to_string(),
object_type: Some("table".to_string()),
name: "t".to_string(),
columns: Some(vec![ColumnDiff {
diff_type: "added".to_string(),
name: "id".to_string(),
source: Some(column("id", "int(11)", None)),
target: None,
changes: vec![],
add_position: None,
}]),
indexes: None,
foreign_keys: None,
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
}];
let dep_graph = DependencyGraph::build(&[], &[]);
let graph = RollbackGraph::from_forward_diffs(&diffs, &[], &dep_graph);
let rollback_sql = generate_rollback_sync_sql(&graph, DatabaseType::Postgres, None, false);
assert!(rollback_sql.contains("DROP COLUMN"), "rollback add→drop: {rollback_sql}");
}
// -- 41. Multiple MySQL→PG type conversion in combined SQL --
#[test]
fn cross_dialect_multiple_type_conversions_in_one_alter() {
let diffs = make_col_diffs(
&[("a1", "tinyint"), ("b1", "mediumint"), ("c1", "float"), ("d1", "double"), ("e1", "datetime")],
&[],
false,
);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Postgres, Some(DialectKind::Mysql));
assert!(sql.contains("SMALLINT"), "tinyint→SMALLINT: {sql}");
assert!(sql.contains("INTEGER"), "mediumint→INTEGER: {sql}");
assert!(sql.contains("REAL"), "float→REAL: {sql}");
assert!(sql.contains("DOUBLE PRECISION"), "double→DOUBLE PRECISION: {sql}");
assert!(sql.contains("TIMESTAMP"), "datetime→TIMESTAMP: {sql}");
}
// -- 42. ADD COLUMN with default value --
#[test]
fn add_column_with_default_value() {
let source = vec![ColumnInfo { column_default: Some("0".into()), ..column("status", "int", None) }];
let target: Vec<ColumnInfo> = vec![];
let diffs = diff_columns_with_options(&source, &target, false, false, false, 0.5);
for (db, label) in [(DatabaseType::Mysql, "MySQL"), (DatabaseType::Postgres, "PG")] {
let sql = gen_sql(wrap_table_diff("t", diffs.clone()), db, None);
assert!(sql.contains("DEFAULT 0"), "{label} default: {sql}");
}
}
// -- 43. Comment changes for non-MySQL databases --
#[test]
fn column_comment_change_non_mysql() {
let source = vec![column("name", "text", Some("new comment"))];
let target = vec![column("name", "text", Some("old comment"))];
let diffs = diff_columns_with_options(&source, &target, false, false, false, 0.5);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Postgres, None);
assert!(sql.contains("COMMENT ON COLUMN"), "PG comment: {sql}");
}
#[test]
fn table_comment_change_mysql() {
let _diffs: Vec<ColumnDiff> = vec![];
let table_diff = TableDiff {
diff_type: "modified".to_string(),
object_type: Some("table".to_string()),
name: "t".to_string(),
columns: None,
indexes: None,
foreign_keys: None,
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: Some(Some("new".to_string())),
target_table_comment: Some(Some("old".to_string())),
sync_sql: None,
};
let sql =
generate_schema_sync_sql(&[table_diff], &[], &[], &[], &[], DatabaseType::Mysql, None, false, None, &[]);
assert!(sql.contains("COMMENT ="), "MySQL table comment: {sql}");
}
// -- 44. Detect renames function (table-level) --
#[test]
fn table_detect_renames_exact_match() {
let removed = vec!["old_table".to_string()];
let added = vec!["new_table".to_string()];
let source_details = vec![TableSchemaDetail {
name: "new_table".into(),
columns: vec![column("id", "int", None), column("name", "text", None)],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: None,
}];
let target_details = vec![TableSchemaDetail {
name: "old_table".into(),
columns: vec![column("id", "int", None), column("name", "text", None)],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: None,
}];
let candidates = detect_renames(&removed, &added, &source_details, &target_details, 0.5);
assert_eq!(candidates.len(), 1, "should detect table rename");
assert_eq!(candidates[0].source_name, "new_table");
assert_eq!(candidates[0].target_name, "old_table");
}
// -- 45. Column rename detection: greedy matching avoids conflicts --
#[test]
fn rename_greedy_matching() {
let s: Vec<ColumnInfo> = vec![column("a", "int", None), column("b", "varchar(10)", None)];
let t: Vec<ColumnInfo> = vec![column("x", "int", None), column("y", "int", None)];
let diffs = diff_columns_with_options(&s, &t, false, false, true, 0.5);
let renamed: Vec<_> = diffs.iter().filter(|d| d.diff_type == "renamed").collect();
// Only one should be renamed (greedy: best score), the other stays added/removed
assert!(renamed.len() <= 1, "greedy should avoid double matching: {renamed:?}");
}
// -- 46. Column precision/scale changes --
#[test]
fn column_precision_scale_change() {
let s = vec![column("amount", "decimal(10,2)", None)];
let t = vec![column("amount", "decimal(8,0)", None)];
let diffs = diff_columns_with_options(&s, &t, false, false, false, 0.5);
assert_eq!(diffs.len(), 1, "should detect precision change");
assert!(
diffs[0].changes.iter().any(|c| c.contains("decimal(8,0) → decimal(10,2)")),
"precision diff: {:?}",
diffs[0].changes
);
}
#[test]
fn column_precision_change_generates_sql() {
let s = vec![column("price", "decimal(10,2)", None)];
let t = vec![column("price", "decimal(8,2)", None)];
let diffs = diff_columns_with_options(&s, &t, false, false, false, 0.5);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Mysql, None);
assert!(sql.contains("decimal(10,2)"), "precision in sql: {sql}");
}
// -- 47. Column length changes --
#[test]
fn column_length_change_detected() {
let s = vec![column("name", "varchar(255)", None)];
let t = vec![column("name", "varchar(100)", None)];
let diffs = diff_columns_with_options(&s, &t, false, false, false, 0.5);
assert_eq!(diffs.len(), 1, "should detect length change");
assert!(
diffs[0].changes.iter().any(|c| c.contains("varchar(100) → varchar(255)")),
"length diff: {:?}",
diffs[0].changes
);
}
#[test]
fn column_length_change_generates_modify_sql() {
let s = vec![column("name", "varchar(255)", None)];
let t = vec![column("name", "varchar(100)", None)];
let diffs = diff_columns_with_options(&s, &t, false, false, false, 0.5);
for (db, label) in [(DatabaseType::Mysql, "MySQL"), (DatabaseType::Postgres, "PG")] {
let sql = gen_sql(wrap_table_diff("t", diffs.clone()), db, None);
assert!(sql.contains("varchar(255)"), "{label} length: {sql}");
}
}
// -- 48. Column comment changes with ignore_comments option --
#[test]
fn column_comment_change_detected() {
let s = vec![column("name", "int", Some("new comment"))];
let t = vec![column("name", "int", Some("old comment"))];
let diffs = diff_columns_with_options(&s, &t, false, false, false, 0.5);
assert_eq!(diffs.len(), 1, "should detect comment change");
assert!(diffs[0].changes.iter().any(|c| c.starts_with("comment:")), "comment diff: {:?}", diffs[0].changes);
}
#[test]
fn column_comment_ignored_when_option_set() {
let s = vec![column("name", "int", Some("new"))];
let t = vec![column("name", "int", Some("old"))];
let diffs = diff_columns_with_options(&s, &t, true, false, false, 0.5);
assert!(diffs.is_empty(), "should ignore comment when option set: {diffs:?}");
}
#[test]
fn column_comment_change_mysql_sql() {
let s = vec![column("name", "varchar(50)", Some("中文注释"))];
let t = vec![column("name", "varchar(50)", Some("old"))];
let diffs = diff_columns_with_options(&s, &t, false, false, false, 0.5);
let sql = gen_sql(wrap_table_diff("t", diffs), DatabaseType::Mysql, None);
assert!(sql.contains("COMMENT"), "MySQL comment: {sql}");
assert!(sql.contains("中文注释"), "Chinese comment: {sql}");
}
#[test]
fn table_comment_change_mysql_sql() {
let _diffs: Vec<ColumnDiff> = vec![];
let table_diff = TableDiff {
diff_type: "modified".to_string(),
object_type: Some("table".to_string()),
name: "t".to_string(),
columns: None,
indexes: None,
foreign_keys: None,
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: Some(Some("新表".to_string())),
target_table_comment: Some(Some("旧表".to_string())),
sync_sql: None,
};
let sql =
generate_schema_sync_sql(&[table_diff], &[], &[], &[], &[], DatabaseType::Mysql, None, false, None, &[]);
assert!(sql.contains("COMMENT ="), "MySQL table comment: {sql}");
assert!(sql.contains("新表"), "Chinese table comment: {sql}");
}
#[test]
fn table_comment_ignored_with_option() {
let options = SchemaDiffPreparationOptions {
source_tables: vec![TableInfo {
name: "t".into(),
table_type: "BASE TABLE".into(),
comment: Some("new".into()),
parent_schema: None,
parent_name: None,
}],
target_tables: vec![TableInfo {
name: "t".into(),
table_type: "BASE TABLE".into(),
comment: Some("old".into()),
parent_schema: None,
parent_name: None,
}],
source_details: vec![TableSchemaDetail {
name: "t".into(),
columns: vec![],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: None,
}],
target_details: vec![TableSchemaDetail {
name: "t".into(),
columns: vec![],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: None,
}],
database_type: DatabaseType::Mysql,
ignore_comments: true,
..Default::default()
};
let result = prepare_schema_diff(options);
assert!(result.diffs.is_empty(), "should ignore table comment: {:?}", result.diffs);
}
// -- 49. Index type differences --
#[test]
fn index_type_diff_btree_vs_hash() {
let diffs = diff_indexes(
&[index(IndexInfo {
name: "idx_t".into(),
columns: vec!["a".into()],
is_unique: false,
is_primary: false,
filter: None,
index_type: Some("BTREE".into()),
included_columns: None,
comment: None,
})],
&[index(IndexInfo {
name: "idx_t".into(),
columns: vec!["a".into()],
is_unique: false,
is_primary: false,
filter: None,
index_type: Some("HASH".into()),
included_columns: None,
comment: None,
})],
);
assert_eq!(diffs.len(), 1, "index type diff detected");
assert!(diffs[0].changes.iter().any(|c| c.contains("type:")), "type change: {:?}", diffs[0].changes);
}
#[test]
fn index_type_fulltext_detected() {
let diffs = diff_indexes(
&[index(IndexInfo {
name: "idx_t".into(),
columns: vec!["content".into()],
is_unique: false,
is_primary: false,
filter: None,
index_type: Some("FULLTEXT".into()),
included_columns: None,
comment: None,
})],
&[index(IndexInfo {
name: "idx_t".into(),
columns: vec!["content".into()],
is_unique: false,
is_primary: false,
filter: None,
index_type: None,
included_columns: None,
comment: None,
})],
);
assert_eq!(diffs[0].changes.iter().filter(|c| c.contains("FULLTEXT")).count(), 1, "fulltext change");
}
// -- 50. Index column ordering --
#[test]
fn index_column_order_different() {
let diffs = diff_indexes(
&[index(IndexInfo {
name: "idx_t".into(),
columns: vec!["a".into(), "b".into()],
is_unique: false,
is_primary: false,
filter: None,
index_type: None,
included_columns: None,
comment: None,
})],
&[index(IndexInfo {
name: "idx_t".into(),
columns: vec!["b".into(), "a".into()],
is_unique: false,
is_primary: false,
filter: None,
index_type: None,
included_columns: None,
comment: None,
})],
);
assert_eq!(diffs.len(), 1, "order diff detected");
assert!(diffs[0].changes.iter().any(|c| c.contains("columns:")), "column order change: {:?}", diffs[0].changes);
}
// -- 51. Included columns in indexes --
#[test]
fn index_included_columns_diff() {
let diffs = diff_indexes(
&[index(IndexInfo {
name: "idx_t".into(),
columns: vec!["a".into()],
is_unique: true,
is_primary: false,
filter: None,
index_type: None,
included_columns: Some(vec!["b".into(), "c".into()]),
comment: None,
})],
&[index(IndexInfo {
name: "idx_t".into(),
columns: vec!["a".into()],
is_unique: true,
is_primary: false,
filter: None,
index_type: None,
included_columns: Some(vec!["b".into()]),
comment: None,
})],
);
assert_eq!(diffs.len(), 1, "included columns diff detected");
assert!(diffs[0].changes.iter().any(|c| c.contains("include:")), "include change: {:?}", diffs[0].changes);
}
#[test]
fn index_included_columns_added() {
let diffs = diff_indexes(
&[index(IndexInfo {
name: "idx_t".into(),
columns: vec!["a".into()],
is_unique: true,
is_primary: false,
filter: None,
index_type: None,
included_columns: Some(vec!["b".into()]),
comment: None,
})],
&[index(IndexInfo {
name: "idx_t".into(),
columns: vec!["a".into()],
is_unique: true,
is_primary: false,
filter: None,
index_type: None,
included_columns: None,
comment: None,
})],
);
assert_eq!(diffs.len(), 1, "included added");
}
// -- 52. Filtered/partial indexes --
#[test]
fn index_filter_change() {
let diffs = diff_indexes(
&[index(IndexInfo {
name: "idx_t".into(),
columns: vec!["status".into()],
is_unique: false,
is_primary: false,
filter: Some("status > 0".into()),
index_type: None,
included_columns: None,
comment: None,
})],
&[index(IndexInfo {
name: "idx_t".into(),
columns: vec!["status".into()],
is_unique: false,
is_primary: false,
filter: None,
index_type: None,
included_columns: None,
comment: None,
})],
);
assert_eq!(diffs.len(), 1, "filter diff");
assert!(diffs[0].changes.iter().any(|c| c.contains("filter:")), "filter change: {:?}", diffs[0].changes);
}
// -- 53. Multiple index operations in one diff --
#[test]
fn multiple_index_operations() {
let diffs = diff_indexes(
&[
index(IndexInfo {
name: "idx_new".into(),
columns: vec!["a".into()],
is_unique: true,
is_primary: false,
filter: None,
index_type: None,
included_columns: None,
comment: None,
}),
index(IndexInfo {
name: "idx_modified".into(),
columns: vec!["a".into(), "b".into()],
is_unique: false,
is_primary: false,
filter: None,
index_type: Some("BTREE".into()),
included_columns: None,
comment: None,
}),
],
&[
index(IndexInfo {
name: "idx_removed".into(),
columns: vec!["c".into()],
is_unique: false,
is_primary: false,
filter: None,
index_type: None,
included_columns: None,
comment: None,
}),
index(IndexInfo {
name: "idx_modified".into(),
columns: vec!["a".into()],
is_unique: true,
is_primary: false,
filter: None,
index_type: None,
included_columns: None,
comment: None,
}),
],
);
assert_eq!(diffs.len(), 3, "add + modify + remove: {diffs:?}");
let types: Vec<&str> = diffs.iter().map(|d| d.diff_type.as_str()).collect();
assert!(types.contains(&"added"), "should have added");
assert!(types.contains(&"removed"), "should have removed");
assert!(types.contains(&"modified"), "should have modified");
}
// -- 54. Foreign key ref_table / ref_column changes --
#[test]
fn foreign_key_reference_table_change() {
let diffs = diff_foreign_keys(
&[foreign_key(ForeignKeyInfo {
name: "fk_t".into(),
column: "user_id".into(),
ref_schema: None,
ref_table: "users".into(),
ref_column: "id".into(),
on_update: None,
on_delete: None,
})],
&[foreign_key(ForeignKeyInfo {
name: "fk_t".into(),
column: "user_id".into(),
ref_schema: None,
ref_table: "employees".into(),
ref_column: "id".into(),
on_update: None,
on_delete: None,
})],
);
assert_eq!(diffs.len(), 1, "ref_table change");
assert!(diffs[0].changes.iter().any(|c| c.contains("ref table")), "ref table: {:?}", diffs[0].changes);
}
#[test]
fn foreign_key_reference_column_change() {
let diffs = diff_foreign_keys(
&[foreign_key(ForeignKeyInfo {
name: "fk_t".into(),
column: "user_id".into(),
ref_schema: None,
ref_table: "users".into(),
ref_column: "id".into(),
on_update: None,
on_delete: None,
})],
&[foreign_key(ForeignKeyInfo {
name: "fk_t".into(),
column: "user_id".into(),
ref_schema: None,
ref_table: "users".into(),
ref_column: "uid".into(),
on_update: None,
on_delete: None,
})],
);
assert_eq!(diffs.len(), 1, "ref_column change");
}
#[test]
fn foreign_key_local_column_change() {
let diffs = diff_foreign_keys(
&[foreign_key(ForeignKeyInfo {
name: "fk_t".into(),
column: "user_id".into(),
ref_schema: None,
ref_table: "users".into(),
ref_column: "id".into(),
on_update: None,
on_delete: None,
})],
&[foreign_key(ForeignKeyInfo {
name: "fk_t".into(),
column: "member_id".into(),
ref_schema: None,
ref_table: "users".into(),
ref_column: "id".into(),
on_update: None,
on_delete: None,
})],
);
assert_eq!(diffs.len(), 1, "local column change");
}
#[test]
fn foreign_key_referential_action_change() {
let diffs = diff_foreign_keys(
&[foreign_key(ForeignKeyInfo {
name: "fk_t".into(),
column: "user_id".into(),
ref_schema: Some("auth".into()),
ref_table: "users".into(),
ref_column: "id".into(),
on_update: Some("cascade".into()),
on_delete: Some("SET NULL".into()),
})],
&[foreign_key(ForeignKeyInfo {
name: "fk_t".into(),
column: "user_id".into(),
ref_schema: Some("auth".into()),
ref_table: "users".into(),
ref_column: "id".into(),
on_update: Some("NO ACTION".into()),
on_delete: Some("RESTRICT".into()),
})],
);
assert_eq!(diffs.len(), 1, "referential action change: {diffs:?}");
assert!(diffs[0].changes.iter().any(|change| change == "delete: RESTRICT → SET NULL"));
assert!(diffs[0].changes.iter().any(|change| change == "update: NO ACTION → CASCADE"));
}
#[test]
fn modified_foreign_key_sql_preserves_reference_schema_and_actions() {
let table_diff = TableDiff {
diff_type: "modified".into(),
object_type: Some("table".into()),
name: "orders".into(),
columns: None,
indexes: None,
foreign_keys: Some(vec![ForeignKeyDiff {
diff_type: "modified".into(),
name: "orders_user_fk".into(),
source: Some(foreign_key(ForeignKeyInfo {
name: "orders_user_fk".into(),
column: "user_id".into(),
ref_schema: Some("identity".into()),
ref_table: "users".into(),
ref_column: "id".into(),
on_update: Some("CASCADE".into()),
on_delete: Some("SET NULL".into()),
})),
target: None,
changes: vec![],
}]),
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
};
let sql = generate_schema_sync_sql(
&[table_diff],
&[],
&[],
&[],
&[],
DatabaseType::Postgres,
Some("sales"),
false,
None,
&[],
);
assert!(sql.contains("REFERENCES \"identity\".\"users\" (\"id\")"), "schema: {sql}");
assert!(sql.contains("ON DELETE SET NULL ON UPDATE CASCADE"), "actions: {sql}");
}
#[test]
fn column_index_fk_combined_diff() {
let col_diffs = make_col_diffs(
&[("id", "int"), ("name2", "varchar(100)")],
&[("id", "int"), ("name", "varchar(50)")],
true,
);
let table_diff = TableDiff {
diff_type: "modified".to_string(),
object_type: Some("table".to_string()),
name: "t".to_string(),
columns: Some(col_diffs),
indexes: Some(vec![
IndexDiff {
diff_type: "added".to_string(),
name: "idx_name".into(),
source: Some(index(IndexInfo {
name: "idx_name".into(),
columns: vec!["name2".into()],
is_unique: false,
is_primary: false,
filter: None,
index_type: Some("BTREE".into()),
included_columns: None,
comment: None,
})),
target: None,
changes: vec![],
},
IndexDiff {
diff_type: "removed".to_string(),
name: "idx_old".into(),
source: None,
target: Some(index(IndexInfo {
name: "idx_old".into(),
columns: vec!["name".into()],
is_unique: false,
is_primary: false,
filter: None,
index_type: None,
included_columns: None,
comment: None,
})),
changes: vec![],
},
]),
foreign_keys: Some(vec![ForeignKeyDiff {
diff_type: "modified".to_string(),
name: "fk_ref".into(),
source: Some(foreign_key(ForeignKeyInfo {
name: "fk_ref".into(),
column: "id".into(),
ref_schema: None,
ref_table: "users".into(),
ref_column: "id".into(),
on_update: None,
on_delete: Some("CASCADE".into()),
})),
target: Some(foreign_key(ForeignKeyInfo {
name: "fk_ref".into(),
column: "id".into(),
ref_schema: None,
ref_table: "users".into(),
ref_column: "id".into(),
on_update: None,
on_delete: Some("SET NULL".into()),
})),
changes: vec!["delete: SET NULL → CASCADE".into()],
}]),
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
};
let sql =
generate_schema_sync_sql(&[table_diff], &[], &[], &[], &[], DatabaseType::Postgres, None, false, None, &[]);
assert!(sql.contains("RENAME COLUMN"), "rename: {sql}");
assert!(sql.contains("CREATE INDEX"), "add index: {sql}");
assert!(sql.contains("DROP INDEX"), "drop index: {sql}");
assert!(sql.contains("DROP CONSTRAINT"), "fk drop: {sql}");
assert!(sql.contains("ADD CONSTRAINT"), "fk add: {sql}");
}
// -- 56. Column order changes with comment option --
#[test]
fn column_order_ignored_when_disabled_but_comment_detected() {
let s = vec![column("a", "int", Some("x")), column("b", "varchar(10)", None)];
let t = vec![column("b", "varchar(10)", None), column("a", "int", None)];
let diffs = diff_columns_with_options(&s, &t, false, false, false, 0.5);
// order compare disabled, so only comment change on "a" should be detected
assert!(!diffs.is_empty(), "comment change should be detected: {diffs:?}");
}
// -- 57. Type conversion with precision types (decimal, numeric) --
#[test]
fn decimal_type_conversion_mysql_to_postgres() {
use crate::sql_dialect::descriptor::TypeMappingMatrix;
let matrix = TypeMappingMatrix::for_dialects(DialectKind::Mysql, DialectKind::Postgres);
// decimal is not in the mapping rules → passes through
let (result, _) = matrix.convert_type("decimal(10,2)");
assert_eq!(result, "decimal(10,2)", "decimal passthrough");
}
// -- 58. Column diff with all attributes different --
#[test]
fn column_all_attributes_changed() {
let s = vec![ColumnInfo {
name: "c".into(),
data_type: "varchar(100)".into(),
is_nullable: true,
column_default: Some("'default'".into()),
comment: Some("new".into()),
is_primary_key: false,
is_unique: false,
extra: None,
numeric_precision: None,
numeric_scale: None,
character_maximum_length: None,
enum_values: None,
character_set: None,
collation: None,
}];
let t = vec![ColumnInfo {
name: "c".into(),
data_type: "varchar(50)".into(),
is_nullable: false,
column_default: None,
comment: Some("old".into()),
is_primary_key: false,
is_unique: false,
extra: None,
numeric_precision: None,
numeric_scale: None,
character_maximum_length: None,
enum_values: None,
character_set: None,
collation: None,
}];
let diffs = diff_columns_with_options(&s, &t, false, false, false, 0.5);
assert_eq!(diffs.len(), 1, "all changes in one diff");
let changes = &diffs[0].changes;
assert!(changes.iter().any(|c| c.starts_with("type:")), "type: {changes:?}");
assert!(changes.iter().any(|c| c.starts_with("nullable:")), "nullable: {changes:?}");
assert!(changes.iter().any(|c| c.starts_with("default:")), "default: {changes:?}");
assert!(changes.iter().any(|c| c.starts_with("comment:")), "comment: {changes:?}");
}
// -- 56. Foreign key with multiple changes (ref_table + ref_column) --
#[test]
fn foreign_key_multiple_changes() {
let diffs = diff_foreign_keys(
&[foreign_key(ForeignKeyInfo {
name: "fk".into(),
column: "id".into(),
ref_schema: None,
ref_table: "users".into(),
ref_column: "id".into(),
on_update: None,
on_delete: None,
})],
&[foreign_key(ForeignKeyInfo {
name: "fk".into(),
column: "id".into(),
ref_schema: None,
ref_table: "employees".into(),
ref_column: "uid".into(),
on_update: None,
on_delete: None,
})],
);
assert_eq!(diffs.len(), 1, "multiple FK changes");
assert!(diffs[0].changes.iter().any(|c| c.contains("ref table")), "ref table: {:?}", diffs[0].changes);
assert!(diffs[0].changes.iter().any(|c| c.contains("ref column")), "ref column: {:?}", diffs[0].changes);
}
// -- 60. With and without ignore_comments on prepare_schema_diff --
#[test]
fn prepare_schema_diff_comment_option_toggle() {
fn run_test(ignore: bool, expect_diffs: bool) {
let options = SchemaDiffPreparationOptions {
source_tables: vec![TableInfo {
name: "t".into(),
table_type: "BASE TABLE".into(),
comment: Some("new_comment".into()),
parent_schema: None,
parent_name: None,
}],
target_tables: vec![TableInfo {
name: "t".into(),
table_type: "BASE TABLE".into(),
comment: Some("old_comment".into()),
parent_schema: None,
parent_name: None,
}],
source_details: vec![TableSchemaDetail {
name: "t".into(),
columns: vec![column("c", "int", Some("col_new"))],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: None,
}],
target_details: vec![TableSchemaDetail {
name: "t".into(),
columns: vec![column("c", "int", Some("col_old"))],
indexes: vec![],
foreign_keys: vec![],
triggers: vec![],
ddl: None,
}],
database_type: DatabaseType::Mysql,
ignore_comments: ignore,
..Default::default()
};
let result = prepare_schema_diff(options);
if expect_diffs {
assert!(!result.diffs.is_empty(), "should have diffs when ignore={ignore}");
} else {
assert!(result.diffs.is_empty(), "should be empty when ignore={ignore}");
}
}
run_test(true, false);
run_test(false, true);
}
// ═══════════════════════════════════════════════════════════════
// Cross-dialect CREATE TABLE tests (all 11×11 pairs)
// ═══════════════════════════════════════════════════════════════
fn _dialect_from_db(db: DatabaseType) -> DialectKind {
DialectKind::from_database_type(db)
}
fn all_kinds() -> Vec<DialectKind> {
vec![
DialectKind::Mysql,
DialectKind::Postgres,
DialectKind::Sqlite,
DialectKind::SqlServer,
DialectKind::Oracle,
DialectKind::H2,
DialectKind::ClickHouse,
DialectKind::DuckDb,
DialectKind::ManticoreSearch,
DialectKind::Informix,
DialectKind::Questdb,
]
}
fn kind_to_db(kind: DialectKind) -> Option<DatabaseType> {
match kind {
DialectKind::Mysql => Some(DatabaseType::Mysql),
DialectKind::Postgres => Some(DatabaseType::Postgres),
DialectKind::Sqlite => Some(DatabaseType::Sqlite),
DialectKind::SqlServer => Some(DatabaseType::SqlServer),
DialectKind::Oracle => Some(DatabaseType::Oracle),
DialectKind::H2 => Some(DatabaseType::H2),
DialectKind::ClickHouse => Some(DatabaseType::ClickHouse),
DialectKind::DuckDb => Some(DatabaseType::DuckDb),
DialectKind::ManticoreSearch => Some(DatabaseType::ManticoreSearch),
DialectKind::Informix => Some(DatabaseType::Informix),
DialectKind::Questdb => Some(DatabaseType::Questdb),
_ => None,
}
}
fn col_pk(name: &str, data_type: &str) -> ColumnInfo {
ColumnInfo { is_primary_key: true, ..column(name, data_type, None) }
}
fn _make_added_table_detail(
name: &str,
columns: Vec<ColumnInfo>,
indexes: Vec<IndexInfo>,
fks: Vec<ForeignKeyInfo>,
ddl: Option<&str>,
) -> TableSchemaDetail {
TableSchemaDetail {
name: name.to_string(),
columns,
indexes,
foreign_keys: fks,
triggers: vec![],
ddl: ddl.map(|s| s.to_string()),
}
}
fn _prepare_create_table(
columns: Vec<ColumnInfo>,
indexes: Vec<IndexInfo>,
fks: Vec<ForeignKeyInfo>,
source_kind: DialectKind,
target_kind: DialectKind,
ddl: Option<&str>,
) -> String {
let Some(db) = kind_to_db(target_kind) else { return String::new() };
let _src_db = kind_to_db(source_kind).unwrap_or(DatabaseType::Mysql);
let options = SchemaDiffPreparationOptions {
source_tables: vec![TableInfo {
name: "t".into(),
table_type: "BASE TABLE".into(),
comment: None,
parent_schema: None,
parent_name: None,
}],
target_tables: vec![],
source_details: vec![_make_added_table_detail("t", columns, indexes, fks, ddl)],
target_details: vec![],
source_functions: vec![],
target_functions: vec![],
source_sequences: vec![],
target_sequences: vec![],
source_rules: vec![],
target_rules: vec![],
source_owners: vec![],
target_owners: vec![],
database_type: db,
target_schema: None,
ignore_comments: false,
cascade_delete: false,
compare_column_order: false,
detect_renames: false,
detect_table_renames: false,
rename_threshold: 0.5,
enable_rollback: false,
source_dialect: Some(source_kind),
target_dialect: Some(target_kind),
batch_patterns: vec![],
compatibility_threshold: 0.5,
source_permissions: vec![],
target_permissions: vec![],
shard_strategy: None,
resource_constraint: None,
field_mappings: vec![],
};
let result = prepare_schema_diff(options);
result.sync_sql
}
fn check_identifiers(sql: &str, tgt: DialectKind) {
match tgt {
DialectKind::Mysql | DialectKind::ManticoreSearch => {
assert!(sql.contains('`'), "{tgt:?} should use backticks");
}
DialectKind::Oracle => {
assert!(!sql.contains('`'), "Oracle no backticks");
assert!(!sql.contains('"'), "Oracle no double-quotes");
}
_ => {
assert!(!sql.contains('`'), "{tgt:?} should NOT use backticks: {sql}");
}
}
}
fn check_no_mysql_residue(sql: &str, tgt: DialectKind) {
if !matches!(tgt, DialectKind::Mysql | DialectKind::ManticoreSearch) {
assert!(!sql.contains("ENGINE="), "residual ENGINE= in {tgt:?}: {sql}");
assert!(!sql.contains("CHARSET"), "residual CHARSET in {tgt:?}: {sql}");
}
}
#[test]
fn mysql_to_access_create_table_uses_access_types_and_counter() {
let columns = vec![
ColumnDiff {
diff_type: "added".into(),
name: "id".into(),
source: Some(ColumnInfo {
name: "id".into(),
data_type: "int(11)".into(),
is_nullable: false,
is_primary_key: true,
is_unique: false,
extra: Some("auto_increment".into()),
..Default::default()
}),
target: None,
changes: vec![],
add_position: None,
},
ColumnDiff {
diff_type: "added".into(),
name: "name2".into(),
source: Some(ColumnInfo {
name: "name2".into(),
data_type: "varchar(120)".into(),
is_nullable: false,
..Default::default()
}),
target: None,
changes: vec![],
add_position: None,
},
ColumnDiff {
diff_type: "added".into(),
name: "del_flag".into(),
source: Some(ColumnInfo {
name: "del_flag".into(),
data_type: "tinyint(2)".into(),
is_nullable: false,
..Default::default()
}),
target: None,
changes: vec![],
add_position: None,
},
ColumnDiff {
diff_type: "added".into(),
name: "create_at".into(),
source: Some(ColumnInfo {
name: "create_at".into(),
data_type: "datetime".into(),
is_nullable: true,
..Default::default()
}),
target: None,
changes: vec![],
add_position: None,
},
];
let indexes = vec![IndexDiff {
diff_type: "added".into(),
name: "idx_del_flag".into(),
source: Some(IndexInfo {
name: "idx_del_flag".into(),
columns: vec!["del_flag".into()],
is_unique: false,
is_primary: false,
index_type: None,
filter: None,
included_columns: None,
comment: None,
}),
target: None,
changes: vec![],
}];
let (sql, missing) = generate_create_table_sql(
"tb_user",
&columns,
&indexes,
&[],
None,
DatabaseType::Access,
None,
Some(DialectKind::Mysql),
&[],
&[],
);
assert!(missing.is_empty(), "{missing:?}");
assert!(sql.contains("COUNTER"), "Access PK should use COUNTER: {sql}");
assert!(!sql.contains("IDENTITY"), "Access must not emit SQL Server IDENTITY: {sql}");
assert!(!sql.contains("int(11)"), "MySQL display width must be stripped: {sql}");
assert!(sql.contains("TEXT(120)") || sql.contains("TEXT (120)"), "varchar→TEXT(n): {sql}");
assert!(
sql.contains("BYTE") || sql.contains("\"del_flag\" BYTE") || sql.to_ascii_uppercase().contains("BYTE"),
"tinyint→BYTE: {sql}"
);
assert!(sql.to_ascii_uppercase().contains("DATETIME"), "datetime stays DATETIME: {sql}");
assert!(sql.contains("CREATE INDEX"), "index: {sql}");
}
fn check_auto_increment(sql: &str, tgt: DialectKind) {
match tgt {
DialectKind::Mysql | DialectKind::ManticoreSearch => {
assert!(sql.contains("AUTO_INCREMENT"), "{tgt:?} should have AUTO_INCREMENT: {sql}");
}
DialectKind::Postgres => {
assert!(sql.contains("SEQUENCE"), "{tgt:?} should use SEQUENCE: {sql}");
}
DialectKind::SqlServer => {
assert!(sql.contains("IDENTITY"), "{tgt:?} should use IDENTITY: {sql}");
}
DialectKind::Oracle => {
assert!(
sql.contains("GENERATED BY DEFAULT AS IDENTITY"),
"{tgt:?} should use GENERATED BY DEFAULT AS IDENTITY: {sql}"
);
}
_ => {
// Other dialects may or may not have auto-increment
}
}
}
fn check_type_conversion(sql: &str, src: DialectKind, tgt: DialectKind) {
match (src, tgt) {
(DialectKind::Mysql, DialectKind::Postgres) => {
assert!(sql.contains("INTEGER"), "int→INTEGER in PG: {sql}");
// Only check if source has these types (S2 has tinyint, datetime)
if sql.contains("tinyint") || sql.contains("TINYINT") {
assert!(sql.contains("SMALLINT"), "tinyint→SMALLINT in PG: {sql}");
}
if sql.contains("datetime") || sql.contains("DATETIME") {
assert!(sql.contains("TIMESTAMP"), "datetime→TIMESTAMP in PG: {sql}");
}
}
(DialectKind::Mysql, DialectKind::Sqlite) => {
assert!(sql.contains("INTEGER"), "int→INTEGER in SQLite: {sql}");
if sql.contains("datetime") || sql.contains("DATETIME") {
assert!(sql.contains("TEXT"), "datetime→TEXT in SQLite: {sql}");
}
}
(DialectKind::Postgres, DialectKind::Mysql) if sql.contains("text") || sql.contains("TEXT") => {}
_ => {}
}
}
fn check_table_sql_structure(sql: &str, tgt: DialectKind) {
assert!(sql.contains("CREATE TABLE"), "{tgt:?} missing CREATE TABLE");
match tgt {
DialectKind::Mysql | DialectKind::ManticoreSearch => {
assert!(sql.contains("PRIMARY KEY"), "{tgt:?} missing PK");
}
_ => {
assert!(sql.contains("PRIMARY KEY"), "{tgt:?} missing PK: {sql}");
}
}
}
// -- S1: simple table (id INT PK AUTO_INCREMENT, name VARCHAR) --
fn s1_diffs() -> Vec<ColumnDiff> {
vec![
ColumnDiff {
diff_type: "added".into(),
name: "id".into(),
source: Some(col_pk("id", "int")),
target: None,
changes: vec![],
add_position: None,
},
ColumnDiff {
diff_type: "added".into(),
name: "name".into(),
source: Some(ColumnInfo {
name: "name".into(),
data_type: "varchar(100)".into(),
is_nullable: false,
..column("name", "varchar(100)", None)
}),
target: None,
changes: vec![],
add_position: None,
},
]
}
fn s1_table_diff(src_kind: DialectKind, tgt_kind: DialectKind) -> TableDiff {
let Some(_db) = kind_to_db(tgt_kind) else { panic!("no db for {tgt_kind:?}") };
let is_mysql_tgt = matches!(tgt_kind, DialectKind::Mysql | DialectKind::ManticoreSearch);
let ddl = if is_mysql_tgt {
Some("CREATE TABLE `t` (`id` int NOT NULL AUTO_INCREMENT, `name` varchar(100) NOT NULL, PRIMARY KEY (`id`)) ENGINE=InnoDB".into())
} else if src_kind == tgt_kind {
Some(
"CREATE TABLE \"t\" (\"id\" INTEGER NOT NULL, \"name\" varchar(100) NOT NULL, PRIMARY KEY (\"id\"));"
.into(),
)
} else {
None
};
TableDiff {
diff_type: "added".into(),
object_type: Some("table".into()),
name: "t".into(),
columns: Some(s1_diffs()),
indexes: None,
foreign_keys: None,
triggers: None,
ddl,
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
}
}
#[test]
fn cross_dialect_s1_all_pairs_simple_table() {
let kinds = all_kinds();
for src in &kinds {
for tgt in &kinds {
let Some(db) = kind_to_db(*tgt) else { continue };
let src_dialect = if src == tgt { None } else { Some(*src) };
let td = s1_table_diff(*src, *tgt);
let sql = generate_schema_sync_sql(&[td], &[], &[], &[], &[], db, None, false, src_dialect, &[]);
check_table_sql_structure(&sql, *tgt);
check_identifiers(&sql, *tgt);
check_no_mysql_residue(&sql, *tgt);
check_auto_increment(&sql, *tgt);
check_type_conversion(&sql, *src, *tgt);
}
}
}
// -- S2: full table (multiple types, index) --
fn s2_diffs() -> (Vec<ColumnDiff>, Vec<IndexDiff>) {
let cols = vec![
ColumnDiff {
diff_type: "added".into(),
name: "id".into(),
source: Some(col_pk("id", "int")),
target: None,
changes: vec![],
add_position: None,
},
ColumnDiff {
diff_type: "added".into(),
name: "title".into(),
source: Some(ColumnInfo {
name: "title".into(),
data_type: "varchar(200)".into(),
is_nullable: false,
..column("title", "varchar(200)", None)
}),
target: None,
changes: vec![],
add_position: None,
},
ColumnDiff {
diff_type: "added".into(),
name: "body".into(),
source: Some(ColumnInfo {
name: "body".into(),
data_type: "text".into(),
is_nullable: true,
..column("body", "text", None)
}),
target: None,
changes: vec![],
add_position: None,
},
ColumnDiff {
diff_type: "added".into(),
name: "views".into(),
source: Some(ColumnInfo {
name: "views".into(),
data_type: "int".into(),
is_nullable: true,
column_default: Some("0".into()),
..column("views", "int", None)
}),
target: None,
changes: vec![],
add_position: None,
},
ColumnDiff {
diff_type: "added".into(),
name: "is_pub".into(),
source: Some(ColumnInfo {
name: "is_pub".into(),
data_type: "tinyint".into(),
is_nullable: true,
..column("is_pub", "tinyint", None)
}),
target: None,
changes: vec![],
add_position: None,
},
ColumnDiff {
diff_type: "added".into(),
name: "created".into(),
source: Some(ColumnInfo {
name: "created".into(),
data_type: "datetime".into(),
is_nullable: true,
..column("created", "datetime", None)
}),
target: None,
changes: vec![],
add_position: None,
},
];
let idxs = vec![IndexDiff {
diff_type: "added".into(),
name: "idx_views".into(),
source: Some(IndexInfo {
name: "idx_views".into(),
columns: vec!["views".into()],
is_unique: false,
is_primary: false,
filter: None,
index_type: None,
included_columns: None,
comment: None,
}),
target: None,
changes: vec![],
}];
(cols, idxs)
}
#[test]
fn cross_dialect_s2_full_table() {
let kinds = all_kinds();
for src in &kinds {
for tgt in &kinds {
let Some(db) = kind_to_db(*tgt) else { continue };
let src_dialect = if src == tgt { None } else { Some(*src) };
let (cols, idxs) = s2_diffs();
let td = TableDiff {
diff_type: "added".into(),
object_type: Some("table".into()),
name: "t".into(),
columns: Some(cols),
indexes: Some(idxs),
foreign_keys: None,
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
};
let sql = generate_schema_sync_sql(&[td], &[], &[], &[], &[], db, None, false, src_dialect, &[]);
check_table_sql_structure(&sql, *tgt);
check_identifiers(&sql, *tgt);
check_no_mysql_residue(&sql, *tgt);
check_auto_increment(&sql, *tgt);
check_type_conversion(&sql, *src, *tgt);
match tgt {
DialectKind::Mysql | DialectKind::ManticoreSearch => {
assert!(sql.contains("KEY "), "{tgt:?} index missing: {sql}");
}
_ => {
assert!(sql.contains("CREATE INDEX"), "{tgt:?} CREATE INDEX missing: {sql}");
}
}
}
}
}
// -- S3: table with foreign keys --
fn s3_diffs() -> (Vec<ColumnDiff>, Vec<ForeignKeyDiff>) {
let cols = vec![
ColumnDiff {
diff_type: "added".into(),
name: "id".into(),
source: Some(col_pk("id", "int")),
target: None,
changes: vec![],
add_position: None,
},
ColumnDiff {
diff_type: "added".into(),
name: "user_id".into(),
source: Some(ColumnInfo {
name: "user_id".into(),
data_type: "int".into(),
is_nullable: false,
..column("user_id", "int", None)
}),
target: None,
changes: vec![],
add_position: None,
},
];
let fks = vec![ForeignKeyDiff {
diff_type: "added".into(),
name: "fk_user".into(),
source: Some(ForeignKeyInfo {
name: "fk_user".into(),
column: "user_id".into(),
ref_schema: None,
ref_table: "users".into(),
ref_column: "id".into(),
on_update: None,
on_delete: Some("CASCADE".into()),
}),
target: None,
changes: vec![],
}];
(cols, fks)
}
#[test]
fn cross_dialect_s3_foreign_key_table() {
let kinds = all_kinds();
for src in &kinds {
for tgt in &kinds {
let Some(db) = kind_to_db(*tgt) else { continue };
let src_dialect = if src == tgt { None } else { Some(*src) };
let (cols, fks) = s3_diffs();
let td = TableDiff {
diff_type: "added".into(),
object_type: Some("table".into()),
name: "t".into(),
columns: Some(cols),
indexes: None,
foreign_keys: Some(fks),
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
};
let sql = generate_schema_sync_sql(&[td], &[], &[], &[], &[], db, None, false, src_dialect, &[]);
check_table_sql_structure(&sql, *tgt);
check_identifiers(&sql, *tgt);
check_no_mysql_residue(&sql, *tgt);
assert!(sql.contains("FOREIGN KEY"), "{tgt:?} FK constraint missing: {sql}");
assert!(sql.contains("REFERENCES"), "{tgt:?} REFERENCES missing: {sql}");
}
}
}
// -- source_dialect=None: verify original DDL preservation --
fn _prepare_create_table_no_dialect(
columns: Vec<ColumnInfo>,
indexes: Vec<IndexInfo>,
target_kind: DialectKind,
ddl: Option<&str>,
) -> String {
let Some(db) = kind_to_db(target_kind) else { return String::new() };
let options = SchemaDiffPreparationOptions {
source_tables: vec![TableInfo {
name: "t".into(),
table_type: "BASE TABLE".into(),
comment: None,
parent_schema: None,
parent_name: None,
}],
target_tables: vec![],
source_details: vec![_make_added_table_detail("t", columns, indexes, vec![], ddl)],
target_details: vec![],
database_type: db,
..Default::default()
};
let result = prepare_schema_diff(options);
result.sync_sql
}
#[test]
fn cross_dialect_none_source_dialect_original_ddl() {
let kinds = all_kinds();
for tgt in &kinds {
let Some(db) = kind_to_db(*tgt) else { continue };
let is_mysql_tgt = matches!(tgt, DialectKind::Mysql | DialectKind::ManticoreSearch);
let ddl_str = "CREATE TABLE `t` (`id` int NOT NULL AUTO_INCREMENT, `name` varchar(100) NOT NULL, PRIMARY KEY (`id`)) ENGINE=InnoDB";
let td = TableDiff {
diff_type: "added".into(),
object_type: Some("table".into()),
name: "t".into(),
columns: Some(s1_diffs()),
indexes: None,
foreign_keys: None,
triggers: None,
ddl: Some(ddl_str.into()),
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
};
let sql = generate_schema_sync_sql(&[td], &[], &[], &[], &[], db, None, false, None, &[]);
check_table_sql_structure(&sql, *tgt);
if is_mysql_tgt {
assert!(sql.contains("ENGINE=InnoDB"), "original DDL preserved for {tgt:?}");
} else {
assert!(!sql.contains("ENGINE="), "ENGINE stripped for {tgt:?}: {sql}");
}
}
}
// -- Reverse cross-dialect: non-MySQL source → MySQL target --
#[test]
fn cross_dialect_postgres_source_to_mysql_target() {
let src = DialectKind::Postgres;
let tgt = DialectKind::Mysql;
let Some(db) = kind_to_db(tgt) else { return };
let cols = vec![
ColumnDiff {
diff_type: "added".into(),
name: "id".into(),
source: Some(col_pk("id", "integer")),
target: None,
changes: vec![],
add_position: None,
},
ColumnDiff {
diff_type: "added".into(),
name: "label".into(),
source: Some(ColumnInfo {
name: "label".into(),
data_type: "text".into(),
is_nullable: false,
..column("label", "text", None)
}),
target: None,
changes: vec![],
add_position: None,
},
];
let td = TableDiff {
diff_type: "added".into(),
object_type: Some("table".into()),
name: "t".into(),
columns: Some(cols),
indexes: None,
foreign_keys: None,
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
};
let sql = generate_schema_sync_sql(&[td], &[], &[], &[], &[], db, None, false, Some(src), &[]);
check_table_sql_structure(&sql, tgt);
check_identifiers(&sql, tgt);
check_type_conversion(&sql, src, tgt);
assert!(sql.contains("AUTO_INCREMENT"), "MySQL auto_increment: {sql}");
assert!(sql.contains("LONGTEXT"), "text→LONGTEXT in MySQL: {sql}");
}
#[test]
fn cross_dialect_sqlserver_source_to_postgres_target() {
let src = DialectKind::SqlServer;
let tgt = DialectKind::Postgres;
let Some(db) = kind_to_db(tgt) else { return };
let cols = vec![
ColumnDiff {
diff_type: "added".into(),
name: "id".into(),
source: Some(col_pk("id", "int")),
target: None,
changes: vec![],
add_position: None,
},
ColumnDiff {
diff_type: "added".into(),
name: "data".into(),
source: Some(ColumnInfo {
name: "data".into(),
data_type: "nvarchar(255)".into(),
is_nullable: true,
..column("data", "nvarchar(255)", None)
}),
target: None,
changes: vec![],
add_position: None,
},
];
let td = TableDiff {
diff_type: "added".into(),
object_type: Some("table".into()),
name: "t".into(),
columns: Some(cols),
indexes: None,
foreign_keys: None,
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
};
let sql = generate_schema_sync_sql(&[td], &[], &[], &[], &[], db, None, false, Some(src), &[]);
check_table_sql_structure(&sql, tgt);
check_identifiers(&sql, tgt);
// No mapping rules for SQL Server→PG → types pass through
assert!(sql.contains("nvarchar(255)"), "passthrough nvarchar: {sql}");
}
#[test]
fn cross_dialect_clickhouse_source_to_mysql_target() {
let src = DialectKind::ClickHouse;
let tgt = DialectKind::Mysql;
let Some(db) = kind_to_db(tgt) else { return };
let cols = vec![
ColumnDiff {
diff_type: "added".into(),
name: "id".into(),
source: Some(col_pk("id", "Int32")),
target: None,
changes: vec![],
add_position: None,
},
ColumnDiff {
diff_type: "added".into(),
name: "data".into(),
source: Some(ColumnInfo {
name: "data".into(),
data_type: "String".into(),
is_nullable: true,
..column("data", "String", None)
}),
target: None,
changes: vec![],
add_position: None,
},
];
let td = TableDiff {
diff_type: "added".into(),
object_type: Some("table".into()),
name: "t".into(),
columns: Some(cols),
indexes: None,
foreign_keys: None,
triggers: None,
ddl: None,
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
};
let sql = generate_schema_sync_sql(&[td], &[], &[], &[], &[], db, None, false, Some(src), &[]);
check_table_sql_structure(&sql, tgt);
check_identifiers(&sql, tgt);
// No mapping rules → types pass through
assert!(sql.contains("Int32"), "passthrough Int32: {sql}");
assert!(sql.contains("String"), "passthrough String: {sql}");
}
#[test]
fn mysql_to_postgres_direct_generate() {
let diffs = vec![
ColumnDiff {
diff_type: "added".into(),
name: "id".into(),
source: Some(col_pk("id", "int")),
target: None,
changes: vec![],
add_position: None,
},
ColumnDiff {
diff_type: "added".into(),
name: "name".into(),
source: Some(ColumnInfo {
name: "name".into(),
data_type: "varchar(100)".into(),
is_nullable: false,
..column("name", "varchar(100)", None)
}),
target: None,
changes: vec![],
add_position: None,
},
];
let table_diff = TableDiff {
diff_type: "added".into(),
object_type: Some("table".into()),
name: "t".into(),
columns: Some(diffs),
indexes: None,
foreign_keys: None,
triggers: None,
ddl: Some("CREATE TABLE `t` (`id` int NOT NULL AUTO_INCREMENT, PRIMARY KEY (`id`)) ENGINE=InnoDB".into()),
target_ddl: None,
source_table_comment: None,
target_table_comment: None,
sync_sql: None,
};
let sql = generate_schema_sync_sql(
&[table_diff],
&[],
&[],
&[],
&[],
DatabaseType::Postgres,
None,
false,
Some(DialectKind::Mysql),
&[],
);
assert!(!sql.contains('`'), "PG SQL should not have backticks: {sql}");
assert!(sql.contains("INTEGER"), "int→INTEGER: {sql}");
assert!(!sql.contains("ENGINE="), "no MySQL ENGINE: {sql}");
}
// -- FieldMapping apply_with_params tests --
#[test]
fn field_mapping_preserve_params() {
let mappings = vec![FieldMapping {
source_type: "VARCHAR".into(),
target_type: "VARCHAR2".into(),
param_strategy: ParamStrategy::Preserve,
custom_params: None,
}];
let result = FieldMapping::apply_with_params(&mappings, "VARCHAR(255)", DialectKind::Oracle);
assert_eq!(result, Some("VARCHAR2(255)".to_string()));
}
#[test]
fn field_mapping_strip_params() {
let mappings = vec![FieldMapping {
source_type: "VARCHAR".into(),
target_type: "TEXT".into(),
param_strategy: ParamStrategy::Strip,
custom_params: None,
}];
let result = FieldMapping::apply_with_params(&mappings, "VARCHAR(255)", DialectKind::Oracle);
assert_eq!(result, Some("TEXT".to_string()));
}
#[test]
fn field_mapping_custom_params() {
let mappings = vec![FieldMapping {
source_type: "VARCHAR".into(),
target_type: "VARCHAR2".into(),
param_strategy: ParamStrategy::Custom,
custom_params: Some("(500)".to_string()),
}];
let result = FieldMapping::apply_with_params(&mappings, "VARCHAR(255)", DialectKind::Oracle);
assert_eq!(result, Some("VARCHAR2(500)".to_string()));
}
#[test]
fn field_mapping_custom_empty_params_falls_back() {
let mappings = vec![FieldMapping {
source_type: "VARCHAR".into(),
target_type: "TEXT".into(),
param_strategy: ParamStrategy::Custom,
custom_params: Some("".to_string()),
}];
let result = FieldMapping::apply_with_params(&mappings, "VARCHAR(255)", DialectKind::Oracle);
assert_eq!(result, Some("TEXT".to_string()));
}
#[test]
fn field_mapping_no_match_returns_none() {
let mappings = vec![FieldMapping {
source_type: "INT".into(),
target_type: "INTEGER".into(),
param_strategy: ParamStrategy::Preserve,
custom_params: None,
}];
let result = FieldMapping::apply_with_params(&mappings, "VARCHAR(255)", DialectKind::Oracle);
assert_eq!(result, None);
}
#[test]
fn field_mapping_preserve_with_yaml_char_type() {
crate::sql_dialect::dialect_loader::register_core_dialects();
let mappings = vec![FieldMapping {
source_type: "VARCHAR".into(),
target_type: "CHAR".into(),
param_strategy: ParamStrategy::Preserve,
custom_params: None,
}];
let result = FieldMapping::apply_with_params(&mappings, "VARCHAR(200)", DialectKind::Oracle);
assert_eq!(
result,
Some("CHAR(200)".to_string()),
"Preserve should keep params for CHAR which has has_length in Oracle YAML"
);
}
#[test]
fn field_mapping_mysql_varchar_to_postgres_character_keeps_params() {
crate::sql_dialect::dialect_loader::register_core_dialects();
let mappings = vec![FieldMapping {
source_type: "VARCHAR".into(),
target_type: "character".into(),
param_strategy: ParamStrategy::Preserve,
custom_params: None,
}];
let result = FieldMapping::apply_with_params(&mappings, "varchar(120)", DialectKind::Postgres);
assert_eq!(
result,
Some("character(120)".to_string()),
"Preserve should keep (120) for PostgreSQL CHARACTER which has has_length in YAML"
);
}
#[test]
fn field_mapping_custom_params_without_parens_is_normalized() {
let mappings = vec![FieldMapping {
source_type: "VARCHAR".into(),
target_type: "character".into(),
param_strategy: ParamStrategy::Custom,
custom_params: Some("100".to_string()),
}];
let result = FieldMapping::apply_with_params(&mappings, "VARCHAR(120)", DialectKind::Postgres);
assert_eq!(
result,
Some("character(100)".to_string()),
"Custom params without parentheses should be wrapped as (100)"
);
}
#[test]
fn field_mapping_custom_params_with_parens_preserved() {
let mappings = vec![FieldMapping {
source_type: "VARCHAR".into(),
target_type: "character".into(),
param_strategy: ParamStrategy::Custom,
custom_params: Some("(100)".to_string()),
}];
let result = FieldMapping::apply_with_params(&mappings, "VARCHAR(120)", DialectKind::Postgres);
assert_eq!(
result,
Some("character(100)".to_string()),
"Custom params already wrapped in parentheses should be kept as-is"
);
}
#[test]
fn postgres_creates_sequences_before_tables_that_reference_them() {
let table_diff = TableDiff {
diff_type: "added".into(),
object_type: Some("table".into()),
name: "events".into(),
ddl: Some(
"CREATE TABLE public.events (id bigint NOT NULL DEFAULT nextval('public.events_id_seq'::regclass))"
.into(),
),
..TableDiff::default()
};
let sequence_diff = SequenceDiff {
diff_type: "added".into(),
name: "events_id_seq".into(),
source: Some(SequenceInfo {
name: "events_id_seq".into(),
data_type: "bigint".into(),
start_value: "1".into(),
min_value: "1".into(),
max_value: "9223372036854775807".into(),
increment: "1".into(),
cycle: false,
last_value: None,
}),
target: None,
changes: vec![],
};
let sql = generate_schema_sync_sql(
&[table_diff],
&[],
&[sequence_diff],
&[],
&[],
DatabaseType::Postgres,
Some("public"),
false,
Some(DialectKind::Postgres),
&[],
);
let sequence_position = sql.find("CREATE SEQUENCE").expect("sequence DDL");
let table_position = sql.find("CREATE TABLE public.events").expect("table DDL");
assert!(sequence_position < table_position, "{sql}");
}
#[test]
fn postgres_drops_sequences_after_dependent_tables() {
let table_diff = TableDiff {
diff_type: "removed".into(),
object_type: Some("table".into()),
name: "events".into(),
..TableDiff::default()
};
let sequence_diff = SequenceDiff {
diff_type: "removed".into(),
name: "events_id_seq".into(),
source: None,
target: None,
changes: vec![],
};
let sql = generate_schema_sync_sql(
&[table_diff],
&[],
&[sequence_diff],
&[],
&[],
DatabaseType::Postgres,
Some("public"),
false,
Some(DialectKind::Postgres),
&[],
);
let table_position = sql.find("DROP TABLE").expect("table DDL");
let sequence_position = sql.find("DROP SEQUENCE").expect("sequence DDL");
assert!(table_position < sequence_position, "{sql}");
}
#[test]
fn postgres_sync_sql_preserves_zero_timestamp_precision() {
let table_diff = TableDiff {
diff_type: "modified".into(),
object_type: Some("table".into()),
name: "events".into(),
columns: Some(vec![ColumnDiff {
diff_type: "modified".into(),
name: "created_at".into(),
source: Some(column("created_at", "timestamp(0) without time zone", None)),
target: Some(column("created_at", "timestamp without time zone", None)),
changes: vec!["type: timestamp without time zone → timestamp(0) without time zone".into()],
add_position: None,
}]),
..TableDiff::default()
};
let sql = generate_schema_sync_sql(
&[table_diff],
&[],
&[],
&[],
&[],
DatabaseType::Postgres,
Some("public"),
false,
Some(DialectKind::Postgres),
&[],
);
assert!(sql.contains("ALTER COLUMN \"created_at\" TYPE timestamp(0)"), "{sql}");
}
#[test]
fn detects_changed_common_mysql_view_definitions() {
let options = common_mysql_view_options(
Some("CREATE ALGORITHM=UNDEFINED DEFINER=`viewer_a`@`%` SQL SECURITY DEFINER VIEW `source_db`.`active_orders` AS select `source_db`.`orders`.`id` AS `id` from `source_db`.`orders` where (`source_db`.`orders`.`active` = 1)"),
Some("CREATE ALGORITHM=UNDEFINED DEFINER=`viewer_b`@`%` SQL SECURITY DEFINER VIEW `target_db`.`active_orders` AS select `target_db`.`orders`.`id` AS `id` from `target_db`.`orders` where (`target_db`.`orders`.`active` = 0)"),
);
let result = prepare_schema_diff(options);
assert_eq!(result.diffs.len(), 1);
let diff = &result.diffs[0];
assert_eq!(diff.diff_type, "modified");
assert_eq!(diff.object_type.as_deref(), Some("view"));
assert!(diff.ddl.as_deref().is_some_and(|ddl| ddl.contains("active` = 1")));
assert!(diff.target_ddl.as_deref().is_some_and(|ddl| ddl.contains("active` = 0")));
assert!(diff.sync_sql.is_none());
assert!(result.sync_sql.is_empty());
}
#[test]
fn ignores_mysql_view_environment_and_formatting_differences() {
let result = prepare_schema_diff(common_mysql_view_options(
Some("CREATE ALGORITHM = UNDEFINED DEFINER = `viewer_a` @ `%` SQL SECURITY DEFINER VIEW `source_db` . `active_orders` AS select `source_db` . `orders` . `id` from `source_db` . `orders` where ( `source_db` . `orders` . `active` = 1 )"),
Some("CREATE ALGORITHM=UNDEFINED DEFINER=`viewer_b`@`localhost` SQL SECURITY DEFINER VIEW `target_db`.`active_orders` AS select `target_db`.`orders`.`id` from `target_db`.`orders` where(`target_db`.`orders`.`active`=1)"),
));
assert!(result.diffs.is_empty());
assert!(result.sync_sql.is_empty());
}
#[test]
fn preserves_mysql_view_literal_contents_during_comparison() {
let common =
"CREATE VIEW `source_db`.`active_orders` AS SELECT 'source_db.orders', 'a b' FROM `source_db`.`orders`";
let changed_schema_literal =
"CREATE VIEW `target_db`.`active_orders` AS SELECT 'target_db.orders', 'a b' FROM `target_db`.`orders`";
let changed_literal_whitespace =
"CREATE VIEW `target_db`.`active_orders` AS SELECT 'source_db.orders', 'a b' FROM `target_db`.`orders`";
assert!(mysql_view_definitions_differ(
common,
changed_schema_literal,
Some(DialectKind::Mysql),
Some(DialectKind::Mysql)
));
assert!(mysql_view_definitions_differ(
common,
changed_literal_whitespace,
Some(DialectKind::Mysql),
Some(DialectKind::Mysql)
));
}
#[test]
fn preserves_mysql_view_compound_operator_semantics() {
let compact = "CREATE VIEW `app`.`active_orders` AS SELECT 1 <=> 1, 1 <= 2, 1 != 2";
let split = "CREATE VIEW `app`.`active_orders` AS SELECT 1 < = > 1, 1 < = 2, 1 ! = 2";
assert!(mysql_view_definitions_differ(compact, split, Some(DialectKind::Mysql), Some(DialectKind::Mysql)));
}
#[test]
fn preserves_mysql_view_options_and_identifier_case() {
let ddl = "CREATE ALGORITHM=MERGE SQL SECURITY INVOKER VIEW `app`.`active_orders` AS SELECT `OrderId` FROM `app`.`orders` WITH CASCADED CHECK OPTION";
for changed in [
ddl.replace("ALGORITHM=MERGE", "ALGORITHM=TEMPTABLE"),
ddl.replace("SECURITY INVOKER", "SECURITY DEFINER"),
ddl.replace("`OrderId`", "`orderid`"),
ddl.replace("CASCADED", "LOCAL"),
] {
assert!(mysql_view_definitions_differ(ddl, &changed, Some(DialectKind::Mysql), Some(DialectKind::Mysql)));
}
}
#[test]
fn common_view_comparison_requires_two_ddls_and_matching_mysql_dialects() {
for (source, target) in [(None, Some("CREATE VIEW v AS SELECT 1")), (Some("CREATE VIEW v AS SELECT 1"), None)] {
assert!(prepare_schema_diff(common_mysql_view_options(source, target)).diffs.is_empty());
}
let mut cross_dialect = common_mysql_view_options(
Some("CREATE VIEW `app`.`active_orders` AS SELECT 1"),
Some("CREATE VIEW active_orders AS SELECT 2"),
);
cross_dialect.target_dialect = Some(DialectKind::Postgres);
assert!(prepare_schema_diff(cross_dialect).diffs.is_empty());
}
#[test]
fn sharded_diff_keeps_common_mysql_view_comparison() {
let source_ddl = "CREATE VIEW `source_db`.`active_orders` AS SELECT 1";
let target_ddl = "CREATE VIEW `target_db`.`active_orders` AS SELECT 2";
let mut options = common_mysql_view_options(Some(source_ddl), Some(target_ddl));
options.source_tables.push(table_info("other_view", "VIEW"));
options.target_tables.push(table_info("other_view", "VIEW"));
options.source_details.push(schema_detail("other_view", Some("CREATE VIEW other_view AS SELECT 1")));
options.target_details.push(schema_detail("other_view", Some("CREATE VIEW other_view AS SELECT 1")));
options.shard_strategy = Some(ShardStrategy { shard_count: 2, shard_by: ShardBy::RoundRobin });
let result = prepare_schema_diff(options);
assert_eq!(result.diffs.len(), 1);
assert_eq!(result.diffs[0].name, "active_orders");
assert_eq!(result.diffs[0].diff_type, "modified");
}
#[test]
fn keeps_added_removed_views_and_table_view_name_boundaries() {
let result = prepare_schema_diff(SchemaDiffPreparationOptions {
source_tables: vec![table_info("source_view", "VIEW"), table_info("same_name", "BASE TABLE")],
target_tables: vec![table_info("target_view", "VIEW"), table_info("same_name", "VIEW")],
source_details: vec![
schema_detail("source_view", Some("CREATE VIEW source_view AS SELECT 1")),
schema_detail("same_name", Some("CREATE TABLE same_name (id int)")),
],
target_details: vec![
schema_detail("target_view", Some("CREATE VIEW target_view AS SELECT 1")),
schema_detail("same_name", Some("CREATE VIEW same_name AS SELECT 1")),
],
database_type: DatabaseType::Mysql,
source_dialect: Some(DialectKind::Mysql),
target_dialect: Some(DialectKind::Mysql),
..Default::default()
});
assert!(result.diffs.iter().any(|diff| diff.name == "source_view"
&& diff.diff_type == "added"
&& diff.object_type.as_deref() == Some("view")));
assert!(result.diffs.iter().any(|diff| diff.name == "target_view"
&& diff.diff_type == "removed"
&& diff.object_type.as_deref() == Some("view")));
assert!(result.diffs.iter().any(|diff| diff.name == "same_name"
&& diff.diff_type == "added"
&& diff.object_type.as_deref() == Some("table")));
assert!(result.diffs.iter().any(|diff| diff.name == "same_name"
&& diff.diff_type == "removed"
&& diff.object_type.as_deref() == Some("view")));
}
#[test]
fn mysql_sync_sql_uses_same_dialect_view_ddl() {
let view_diff = TableDiff {
diff_type: "added".into(),
object_type: Some("view".into()),
name: "active_users".into(),
ddl: Some("CREATE VIEW `active_users` AS SELECT `id` FROM `users` WHERE `active` = 1;".into()),
..TableDiff::default()
};
let sql = generate_schema_sync_sql(
&[view_diff],
&[],
&[],
&[],
&[],
DatabaseType::Mysql,
Some("app"),
false,
Some(DialectKind::Mysql),
&[],
);
assert!(sql.contains("CREATE VIEW `active_users`"), "{sql}");
assert!(!sql.contains("Source view definition is not available"), "{sql}");
assert!(!sql.contains(";;"), "{sql}");
}
#[test]
fn cross_dialect_sync_sql_does_not_reuse_view_ddl() {
let view_diff = TableDiff {
diff_type: "added".into(),
object_type: Some("view".into()),
name: "active_users".into(),
ddl: Some("CREATE VIEW `active_users` AS SELECT `id` FROM `users`".into()),
..TableDiff::default()
};
let sql = generate_schema_sync_sql(
&[view_diff],
&[],
&[],
&[],
&[],
DatabaseType::Postgres,
Some("public"),
false,
Some(DialectKind::Mysql),
&[],
);
assert!(!sql.contains("CREATE VIEW `active_users`"), "{sql}");
assert!(sql.contains("Source view definition cannot be reused across different SQL dialects"), "{sql}");
}
#[test]
fn same_dialect_sync_sql_keeps_diagnostic_without_view_ddl() {
let view_diff = TableDiff {
diff_type: "added".into(),
object_type: Some("view".into()),
name: "active_users".into(),
..TableDiff::default()
};
let sql = generate_schema_sync_sql(
&[view_diff],
&[],
&[],
&[],
&[],
DatabaseType::Mysql,
Some("app"),
false,
Some(DialectKind::Mysql),
&[],
);
assert!(sql.contains("Source view definition is not available from this driver yet"), "{sql}");
}
#[test]
fn postgres_function_sequence_rule_owner_use_profile_templates() {
let fn_diff = FunctionDiff {
diff_type: "added".into(),
name: "f1".into(),
source: Some(FunctionInfo {
name: "f1".into(),
function_type: "FUNCTION".into(),
data_type: "int".into(),
definition: "RETURNS int LANGUAGE sql AS $$ SELECT 1 $$".into(),
arguments: "".into(),
}),
target: None,
changes: vec![],
};
let seq_diff = SequenceDiff {
diff_type: "added".into(),
name: "s1".into(),
source: Some(SequenceInfo {
name: "s1".into(),
data_type: "bigint".into(),
start_value: "1".into(),
min_value: "1".into(),
max_value: "100".into(),
increment: "1".into(),
cycle: false,
last_value: None,
}),
target: None,
changes: vec![],
};
let rule_diff = RuleDiff {
diff_type: "removed".into(),
name: "r1".into(),
source: Some(RuleInfo {
name: "r1".into(),
table_name: "t1".into(),
definition: "CREATE RULE r1 AS ON INSERT TO t1 DO NOTHING".into(),
}),
target: None,
changes: vec![],
};
let owner_diff = OwnerDiff {
diff_type: "modified".into(),
object_name: "t1".into(),
source: Some(OwnerInfo { object_name: "t1".into(), object_type: "TABLE".into(), owner: "app".into() }),
target: Some(OwnerInfo { object_name: "t1".into(), object_type: "TABLE".into(), owner: "old".into() }),
changes: vec![],
};
let sql = generate_schema_sync_sql(
&[],
&[fn_diff],
&[seq_diff],
&[rule_diff],
&[owner_diff],
DatabaseType::Postgres,
Some("public"),
true,
None,
&[],
);
assert!(sql.contains("CREATE OR REPLACE FUNCTION"), "{sql}");
assert!(sql.contains("CREATE SEQUENCE"), "{sql}");
assert!(sql.contains("NO CYCLE"), "{sql}");
assert!(sql.contains("DROP RULE IF EXISTS r1 ON"), "{sql}");
assert!(sql.contains("OWNER TO app"), "{sql}");
assert!(sql.contains("CASCADE"), "{sql}");
}
#[test]
fn mysql_skips_function_sequence_when_templates_absent() {
let fn_diff = FunctionDiff {
diff_type: "added".into(),
name: "f1".into(),
source: Some(FunctionInfo {
name: "f1".into(),
function_type: "FUNCTION".into(),
data_type: "int".into(),
definition: "RETURNS int RETURN 1".into(),
arguments: "".into(),
}),
target: None,
changes: vec![],
};
let sql = generate_schema_sync_sql(&[], &[fn_diff], &[], &[], &[], DatabaseType::Mysql, None, false, None, &[]);
assert!(sql.contains("-- Skip function f1"), "{sql}");
assert!(!sql.contains("CREATE FUNCTION"), "{sql}");
}
}
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