Improve error messages emitted when VACUUM and ANALYZE skip a table.

Per gripe from Clodoaldo Pinto Neto on
Message-ID: <a595de7a0801060326qbfc790ax2a60573043c2e2be@mail.gmail.com>

src/backend/commands/analyze.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/commands/analyze.c,v 1.114 2008/01/03 21:23:15 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/commands/analyze.c,v 1.115 2008/02/20 14:31:35 alvherre Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -22,6 +22,7 @@
 #include "catalog/index.h"
 #include "catalog/indexing.h"
 #include "catalog/namespace.h"
+#include "catalog/pg_namespace.h"
 #include "commands/dbcommands.h"
 #include "commands/vacuum.h"
 #include "executor/executor.h"
@@ -161,9 +162,20 @@ analyze_rel(Oid relid, VacuumStmt *vacstmt,
 	{
 		/* No need for a WARNING if we already complained during VACUUM */
 		if (!vacstmt->vacuum)
-			ereport(WARNING,
-					(errmsg("skipping \"%s\" --- only table or database owner can analyze it",
-							RelationGetRelationName(onerel))));
+		{
+			if (onerel->rd_rel->relisshared)
+				ereport(WARNING,
+						(errmsg("skipping \"%s\" --- only superuser can analyze it",
+								RelationGetRelationName(onerel))));
+			else if (onerel->rd_rel->relnamespace == PG_CATALOG_NAMESPACE)
+				ereport(WARNING,
+						(errmsg("skipping \"%s\" --- only superuser or database owner can analyze it",
+								RelationGetRelationName(onerel))));
+			else
+				ereport(WARNING,
+						(errmsg("skipping \"%s\" --- only table or database owner can analyze it",
+								RelationGetRelationName(onerel))));
+		}
 		relation_close(onerel, ShareUpdateExclusiveLock);
 		return;
 	}

src/backend/commands/vacuum.c

@@ -13,7 +13,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.364 2008/02/11 19:14:30 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.365 2008/02/20 14:31:35 alvherre Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -30,6 +30,7 @@
 #include "access/xlog.h"
 #include "catalog/namespace.h"
 #include "catalog/pg_database.h"
+#include "catalog/pg_namespace.h"
 #include "commands/dbcommands.h"
 #include "commands/vacuum.h"
 #include "executor/executor.h"
@@ -1048,9 +1049,18 @@ vacuum_rel(Oid relid, VacuumStmt *vacstmt, char expected_relkind)
 	if (!(pg_class_ownercheck(RelationGetRelid(onerel), GetUserId()) ||
 		  (pg_database_ownercheck(MyDatabaseId, GetUserId()) && !onerel->rd_rel->relisshared)))
 	{
-		ereport(WARNING,
-				(errmsg("skipping \"%s\" --- only table or database owner can vacuum it",
-						RelationGetRelationName(onerel))));
+		if (onerel->rd_rel->relisshared)
+			ereport(WARNING,
+					(errmsg("skipping \"%s\" --- only superuser can vacuum it",
+							RelationGetRelationName(onerel))));
+		else if (onerel->rd_rel->relnamespace == PG_CATALOG_NAMESPACE)
+			ereport(WARNING,
+					(errmsg("skipping \"%s\" --- only superuser or database owner can vacuum it",
+							RelationGetRelationName(onerel))));
+		else
+			ereport(WARNING,
+					(errmsg("skipping \"%s\" --- only table or database owner can vacuum it",
+							RelationGetRelationName(onerel))));
 		relation_close(onerel, lmode);
 		CommitTransactionCommand();
 		return;