Try to make 'cross-database references are not implemented' errors a

bit more helpful by identifying the specific qualified name being
complained of.

src/backend/catalog/namespace.c

@@ -13,7 +13,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/catalog/namespace.c,v 1.62 2004/01/19 19:04:40 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/catalog/namespace.c,v 1.63 2004/02/13 01:08:20 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -165,7 +165,9 @@ RangeVarGetRelid(const RangeVar *relation, bool failOK)
 		if (strcmp(relation->catalogname, get_database_name(MyDatabaseId)) != 0)
 			ereport(ERROR,
 					(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
-			   errmsg("cross-database references are not implemented")));
+			   errmsg("cross-database references are not implemented: \"%s.%s.%s\"",
+					  relation->catalogname, relation->schemaname,
+					  relation->relname)));
 	}
 
 	if (relation->schemaname)
@@ -218,7 +220,9 @@ RangeVarGetCreationNamespace(const RangeVar *newRelation)
 		if (strcmp(newRelation->catalogname, get_database_name(MyDatabaseId)) != 0)
 			ereport(ERROR,
 					(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
-			   errmsg("cross-database references are not implemented")));
+			   errmsg("cross-database references are not implemented: \"%s.%s.%s\"",
+					  newRelation->catalogname, newRelation->schemaname,
+					  newRelation->relname)));
 	}
 
 	if (newRelation->istemp)
@@ -1182,7 +1186,8 @@ DeconstructQualifiedName(List *names,
 			if (strcmp(catalogname, get_database_name(MyDatabaseId)) != 0)
 				ereport(ERROR,
 						(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
-				errmsg("cross-database references are not implemented")));
+				errmsg("cross-database references are not implemented: %s",
+					   NameListToString(names))));
 			break;
 		default:
 			ereport(ERROR,

src/backend/parser/parse_expr.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/parser/parse_expr.c,v 1.164 2003/11/29 19:51:52 pgsql Exp $
+ *	  $PostgreSQL: pgsql/src/backend/parser/parse_expr.c,v 1.165 2004/02/13 01:08:20 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1115,7 +1115,8 @@ transformColumnRef(ParseState *pstate, ColumnRef *cref)
 				if (strcmp(name1, get_database_name(MyDatabaseId)) != 0)
 					ereport(ERROR,
 							(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
-							 errmsg("cross-database references are not implemented")));
+							 errmsg("cross-database references are not implemented: %s",
+									NameListToString(cref->fields))));
 
 				/* Whole-row reference? */
 				if (strcmp(name4, "*") == 0)

src/backend/parser/parse_target.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/parser/parse_target.c,v 1.114 2003/11/29 19:51:52 pgsql Exp $
+ *	  $PostgreSQL: pgsql/src/backend/parser/parse_target.c,v 1.115 2004/02/13 01:08:20 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -159,7 +159,8 @@ transformTargetList(ParseState *pstate, List *targetlist)
 							if (strcmp(name1, get_database_name(MyDatabaseId)) != 0)
 								ereport(ERROR,
 										(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
-										 errmsg("cross-database references are not implemented")));
+										 errmsg("cross-database references are not implemented: %s",
+												NameListToString(fields))));
 							schemaname = strVal(lsecond(fields));
 							relname = strVal(lthird(fields));
 							break;