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fix(mysql): avoid key usage join for columns

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t8y2
2026-06-22 18:46:45 +08:00
parent 9de738e76c
commit e55dbe2acc
1 changed files with 8 additions and 17 deletions
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crates/dbx-core/src/db/mysql.rs
+8 -17
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@@ -1301,15 +1301,8 @@ pub async fn list_completion_objects(pool: &MySqlPool, database: &str) -> Result
fn columns_sql(database: &str, table: &str) -> String {
format!(
"SELECT c.COLUMN_NAME, c.COLUMN_TYPE, c.IS_NULLABLE, c.COLUMN_DEFAULT, c.EXTRA, \
c.COLUMN_COMMENT, \
c.COLUMN_KEY, c.NUMERIC_PRECISION, c.NUMERIC_SCALE, c.CHARACTER_MAXIMUM_LENGTH, \
CASE WHEN pk.COLUMN_NAME IS NOT NULL THEN 1 ELSE 0 END AS is_pk \
c.COLUMN_COMMENT, c.COLUMN_KEY, c.NUMERIC_PRECISION, c.NUMERIC_SCALE, c.CHARACTER_MAXIMUM_LENGTH \
FROM information_schema.COLUMNS c \
LEFT JOIN information_schema.KEY_COLUMN_USAGE pk \
ON pk.TABLE_SCHEMA = c.TABLE_SCHEMA \
AND pk.TABLE_NAME = c.TABLE_NAME \
AND pk.COLUMN_NAME = c.COLUMN_NAME \
AND pk.CONSTRAINT_NAME = 'PRIMARY' \
WHERE c.TABLE_SCHEMA = {} AND c.TABLE_NAME = {} \
ORDER BY c.ORDINAL_POSITION",
quote_value(database),
@@ -1403,9 +1396,8 @@ pub async fn get_columns(pool: &MySqlPool, database: &str, table: &str) -> Resul
return None;
}
let column_key = get_str_by_name(row, "COLUMN_KEY");
let from_pk_join = row.get::<i32, &str>("is_pk").unwrap_or(0) == 1;
Some(ColumnInfo {
is_primary_key: from_pk_join || column_key.eq_ignore_ascii_case("PRI"),
is_primary_key: column_key.eq_ignore_ascii_case("PRI"),
name,
data_type: get_str_by_name(row, "COLUMN_TYPE"),
is_nullable: get_str_by_name(row, "IS_NULLABLE") == "YES",
@@ -2127,11 +2119,12 @@ mod tests {
}
#[test]
fn mysql_columns_sql_joins_key_column_usage_for_primary_keys() {
fn mysql_columns_sql_uses_column_key_for_primary_keys_without_join() {
let sql = columns_sql("app", "users");
assert!(sql.contains("LEFT JOIN information_schema.KEY_COLUMN_USAGE"));
assert!(sql.contains("CONSTRAINT_NAME = 'PRIMARY'"));
assert!(sql.contains("information_schema.COLUMNS"));
assert!(!sql.contains("KEY_COLUMN_USAGE"));
assert!(!sql.contains("CONSTRAINT_NAME = 'PRIMARY'"));
assert!(sql.contains("c.COLUMN_KEY"));
assert!(!sql.contains("COLLATE"));
}
@@ -2200,11 +2193,9 @@ mod tests {
}
#[test]
fn mysql_column_key_marks_primary_when_pk_join_returns_null() {
// COLUMN_KEY='PRI' provides a fallback when KEY_COLUMN_USAGE LEFT JOIN returns NULL
let from_pk_join = false;
fn mysql_column_key_marks_primary() {
let column_key = "PRI";
let is_pk = from_pk_join || column_key.eq_ignore_ascii_case("PRI");
let is_pk = column_key.eq_ignore_ascii_case("PRI");
assert!(is_pk);
}