fix(grid): exclude postgres serial primary keys in pk-free copies

crates/dbx-core/src/data_grid_extractors/tests.rs

@@ -983,6 +983,44 @@ fn sql_insert_honors_primary_key_exclusion_and_row_by_row_mode() {
     assert_eq!(result.omitted_columns, vec!["id"]);
 }
 
+#[test]
+fn sql_insert_primary_key_exclusion_omits_postgres_serial_key() {
+    let mut request = request(DataGridExtractorId::SqlInserts);
+    request.database_type = Some(DatabaseType::Postgres);
+    request.table_meta = Some(DataGridTableMeta {
+        catalog: None,
+        database: None,
+        schema: Some("public".to_string()),
+        table_name: "users".to_string(),
+        primary_keys: vec!["id".to_string()],
+        columns: Some(vec![
+            DataGridColumnInfo {
+                name: "id".to_string(),
+                data_type: "integer".to_string(),
+                is_nullable: false,
+                is_primary_key: true,
+                column_default: None,
+                extra: Some("serial".to_string()),
+            },
+            DataGridColumnInfo {
+                name: "name".to_string(),
+                data_type: "text".to_string(),
+                is_nullable: false,
+                is_primary_key: false,
+                column_default: None,
+                extra: None,
+            },
+        ]),
+    });
+    request.rows = vec![vec![json!(1), json!("Ada")]];
+    request.options.sql.exclude_primary_keys_from_insert = true;
+
+    let result = extract_data_grid_selection(request).expect("PostgreSQL SQL INSERT extraction");
+
+    assert_eq!(result.text, "INSERT INTO \"public\".\"users\" (\"name\") VALUES ('Ada');");
+    assert_eq!(result.omitted_columns, vec!["id"]);
+}
+
 #[test]
 fn sql_insert_primary_key_exclusion_keeps_manual_composite_key_members() {
     let mut request = request(DataGridExtractorId::SqlInserts);

crates/dbx-core/src/data_grid_sql.rs

@@ -3251,14 +3251,14 @@ pub(crate) fn is_neo4j_element_id(database_type: Option<DatabaseType>, name: Opt
 }
 
 pub(crate) fn extra_is_auto_generated(extra: &str) -> bool {
-    extra
-        .to_ascii_lowercase()
-        .split(|ch: char| !ch.is_ascii_alphanumeric() && ch != '_')
-        .any(|part| matches!(part, "auto_increment" | "autoincrement" | "identity"))
+    extra.to_ascii_lowercase().split(|ch: char| !ch.is_ascii_alphanumeric() && ch != '_').any(|part| {
+        matches!(part, "auto_increment" | "autoincrement" | "identity" | "smallserial" | "serial" | "bigserial")
+    })
 }
 
 pub(crate) fn is_auto_generated_column(column: &DataGridColumnInfo) -> bool {
     extra_is_auto_generated(column.extra.as_deref().unwrap_or(""))
+        || column.column_default.as_deref().is_some_and(|default| default.to_ascii_lowercase().contains("nextval("))
 }
 
 fn grid_value_is_empty(value: &Value) -> bool {
@@ -4028,6 +4028,55 @@ mod tests {
         );
     }
 
+    #[test]
+    fn recognizes_postgres_serial_extras_as_auto_generated() {
+        for extra in ["serial", "smallserial", "bigserial"] {
+            assert!(extra_is_auto_generated(extra), "expected {extra} to be auto-generated");
+        }
+    }
+
+    #[test]
+    fn builds_postgres_copy_insert_without_serial_primary_key() {
+        let statement = build_data_grid_copy_insert_statement(DataGridCopyInsertStatementOptions {
+            database_type: Some(DatabaseType::Postgres),
+            identifier_quote: None,
+            table_meta: Some(DataGridTableMeta {
+                catalog: None,
+                database: None,
+                schema: Some("public".to_string()),
+                table_name: "users".to_string(),
+                primary_keys: vec!["id".to_string()],
+                columns: Some(vec![
+                    DataGridColumnInfo {
+                        name: "id".to_string(),
+                        data_type: "integer".to_string(),
+                        is_nullable: false,
+                        is_primary_key: true,
+                        column_default: Some("nextval('public.users_id_seq'::regclass)".to_string()),
+                        extra: None,
+                    },
+                    DataGridColumnInfo {
+                        name: "name".to_string(),
+                        data_type: "text".to_string(),
+                        is_nullable: false,
+                        is_primary_key: false,
+                        column_default: None,
+                        extra: None,
+                    },
+                ]),
+            }),
+            columns: vec!["id".to_string(), "name".to_string()],
+            column_types: None,
+            source_columns: None,
+            rows: vec![vec![json!(1), json!("Ada")]],
+            exclude_primary_keys: true,
+            include_computed_columns: false,
+            insert_mode: DataGridCopyInsertMode::Merged,
+        });
+
+        assert_eq!(statement.as_deref(), Some("INSERT INTO \"public\".\"users\" (\"name\") VALUES ('Ada');"));
+    }
+
     #[test]
     fn copy_insert_uses_display_columns_but_source_columns_for_metadata() {
         let statement = build_data_grid_copy_insert_statement(DataGridCopyInsertStatementOptions {