Fix: include views in PostgreSQL getTableComment() relkind filter (#297)

* Fix: include views in PostgreSQL getTableComment() relkind filter

The relkind filter excluded 'v' (ordinary views), so view comments
were always null even when set via COMMENT ON VIEW.

Closes #296

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* Add integration test for view comment in PostgreSQL

Creates a view with COMMENT ON VIEW in the test setup and asserts
that getTableComment() returns the comment for views.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: tianzhou

src/connectors/__tests__/postgres.integration.test.ts

@@ -167,6 +167,12 @@ class PostgreSQLIntegrationTest extends IntegrationTestBase<PostgreSQLTestContai
       ON CONFLICT DO NOTHING
     `, {});
 
+    // Create a view with a comment (for view comment test)
+    await connector.executeSQL(`
+      CREATE OR REPLACE VIEW active_users AS SELECT id, name, email FROM users WHERE age >= 25
+    `, {});
+    await connector.executeSQL(`COMMENT ON VIEW active_users IS 'Users aged 25 or older'`, {});
+
     // Create test stored procedures using SQL language to avoid dollar quoting
     await connector.executeSQL(`
       CREATE OR REPLACE FUNCTION get_user_count()
@@ -245,6 +251,11 @@ describe('PostgreSQL Connector Integration Tests', () => {
       expect(result.rows[0].array_val).toBeDefined();
     });
 
+    it('should return comment for views via getTableComment', async () => {
+      const comment = await postgresTest.connector.getTableComment!('active_users');
+      expect(comment).toBe('Users aged 25 or older');
+    });
+
     it('should handle PostgreSQL returning clause', async () => {
       const result = await postgresTest.connector.executeSQL(
         "INSERT INTO users (name, email, age) VALUES ('Returning Test', 'returning@example.com', 40) RETURNING id, name",

src/connectors/postgres/index.ts

@@ -382,7 +382,7 @@ export class PostgresConnector implements Connector {
         JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
         WHERE c.relname = $1
         AND n.nspname = $2
-        AND c.relkind IN ('r','p','m','f')
+        AND c.relkind IN ('r','p','m','f','v')
       `,
         [tableName, schemaToUse]
       );