modified: backend/src/controllers/schemaController.ts

modified:   frontend/package.json
	modified:   frontend/src/pages/DatabaseSchema.tsx

backend/src/controllers/schemaController.ts

@@ -38,13 +38,15 @@ async function parsePostgresSchema(databaseId: string): Promise<SchemaData> {
     throw new Error('Database not found or not active');
   }
 
-  // Get all tables
+  // Get all tables with comments via pg_catalog
   const tablesResult = await pool.query(`
     SELECT
       t.table_schema,
       t.table_name,
-      obj_description((t.table_schema || '.' || t.table_name)::regclass, 'pg_class') as table_comment
+      pg_catalog.obj_description(c.oid, 'pg_class') as table_comment
     FROM information_schema.tables t
+    LEFT JOIN pg_catalog.pg_class c ON c.relname = t.table_name
+    LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace AND n.nspname = t.table_schema
     WHERE t.table_schema NOT IN ('pg_catalog', 'information_schema')
       AND t.table_type = 'BASE TABLE'
     ORDER BY t.table_schema, t.table_name
@@ -61,8 +63,10 @@ async function parsePostgresSchema(databaseId: string): Promise<SchemaData> {
         c.is_nullable,
         c.column_default,
         CASE WHEN pk.column_name IS NOT NULL THEN true ELSE false END as is_primary,
-        col_description((c.table_schema || '.' || c.table_name)::regclass, c.ordinal_position) as column_comment
+        pg_catalog.col_description(pc.oid, c.ordinal_position) as column_comment
       FROM information_schema.columns c
+      LEFT JOIN pg_catalog.pg_class pc ON pc.relname = c.table_name
+      LEFT JOIN pg_catalog.pg_namespace pn ON pn.oid = pc.relnamespace AND pn.nspname = c.table_schema
       LEFT JOIN (
         SELECT ku.column_name, ku.table_schema, ku.table_name
         FROM information_schema.table_constraints tc