Fixes bug where join to pg_description was incorrect. Also modifies the

regression test to test for this case.  Patch submitted by Kris Jurka.

 Modified Files:
 	jdbc/org/postgresql/jdbc1/AbstractJdbc1DatabaseMetaData.java
 	jdbc/org/postgresql/test/jdbc2/DatabaseMetaDataTest.java

Author: Barry Lind

src/interfaces/jdbc/org/postgresql/jdbc1/AbstractJdbc1DatabaseMetaData.java

@@ -1988,7 +1988,7 @@ public java.sql.ResultSet getTables(String catalog, String schemaPattern, String
 			" END "+
 			" AS TABLE_TYPE, d.description AS REMARKS "+
 			" FROM pg_catalog.pg_namespace n, pg_catalog.pg_class c "+
-			" LEFT JOIN pg_catalog.pg_description d ON (c.oid = d.objoid) "+
+			" LEFT JOIN pg_catalog.pg_description d ON (c.oid = d.objoid AND d.objsubid = 0) "+
 			" LEFT JOIN pg_catalog.pg_class dc ON (d.classoid=dc.oid AND dc.relname='pg_class') "+
 			" LEFT JOIN pg_catalog.pg_namespace dn ON (dn.oid=dc.relnamespace AND dn.nspname='pg_catalog') "+
 			" WHERE c.relnamespace = n.oid ";
@@ -2038,7 +2038,7 @@ public java.sql.ResultSet getTables(String catalog, String schemaPattern, String
 			if (connection.haveMinimumServerVersion("7.1")) {
 				select = "SELECT NULL AS TABLE_CAT, NULL AS TABLE_SCHEM, c.relname AS TABLE_NAME, "+tableType+" AS TABLE_TYPE, d.description AS REMARKS "+
 					" FROM pg_class c "+
-					" LEFT JOIN pg_description d ON (c.oid=d.objoid) "+
+					" LEFT JOIN pg_description d ON (c.oid=d.objoid AND d.objsubid = 0) "+
 					" LEFT JOIN pg_class dc ON (d.classoid = dc.oid AND dc.relname='pg_class') "+
 					" WHERE true ";
 			} else {

src/interfaces/jdbc/org/postgresql/test/jdbc2/DatabaseMetaDataTest.java

@@ -9,7 +9,7 @@
  *
  * PS: Do you know how difficult it is to type on a train? ;-)
  *
- * $Id: DatabaseMetaDataTest.java,v 1.15 2002/10/01 00:39:02 davec Exp $
+ * $Id: DatabaseMetaDataTest.java,v 1.16 2002/11/11 07:11:12 barry Exp $
  */
 
 public class DatabaseMetaDataTest extends TestCase
@@ -28,6 +28,11 @@ protected void setUp() throws Exception
 	{
 		con = TestUtil.openDB();
 		TestUtil.createTable( con, "testmetadata", "id int4, name text, updated timestamp" );
+		Statement stmt = con.createStatement();
+		//we add the following comments to ensure the joins to the comments
+		//are done correctly. This ensures we correctly test that case.
+		stmt.execute("comment on table testmetadata is 'this is a table comment'");
+		stmt.execute("comment on column testmetadata.id is 'this is a column comment'");
 	}
 	protected void tearDown() throws Exception
 	{
@@ -44,12 +49,14 @@ public void testTables()
 			DatabaseMetaData dbmd = con.getMetaData();
 			assertNotNull(dbmd);
 
-			ResultSet rs = dbmd.getTables( null, null, "test%", new String[] {"TABLE"});
+			ResultSet rs = dbmd.getTables( null, null, "testmetadat%", new String[] {"TABLE"});
 			assertTrue( rs.next() );
 			String tableName = rs.getString("TABLE_NAME");
 			assertTrue( tableName.equals("testmetadata") );
 			String tableType = rs.getString("TABLE_TYPE");
 			assertTrue( tableType.equals("TABLE") );
+            //There should only be one row returned 
+            assertTrue( "getTables() returned too many rows", rs.next() == false);
 			rs.close();
 
 			rs = dbmd.getColumns("", "", "test%", "%" );