Revert "Forbid DROP SCHEMA on temporary namespaces"

michaelpq · michaelpq · commit b83ba2e6e706 · 2020-01-08T10:36:52.000+09:00
This reverts commit a052f6c, following complains from Robert Haas and Tom Lane. Backpatch down to 9.4, like the previous commit. Discussion: https://postgr.es/m/CA+TgmobL4npEX5=E5h=5Jm_9mZun3MT39Kq2suJFVeamc9skSQ@mail.gmail.com Backpatch-through: 9.4
diff --git a/src/backend/commands/dropcmds.c b/src/backend/commands/dropcmds.c
@@ -26,7 +26,6 @@
 #include "nodes/makefuncs.h"
 #include "parser/parse_type.h"
 #include "utils/builtins.h"
-#include "utils/lsyscache.h"
 #include "utils/syscache.h"
 
 
@@ -117,21 +116,6 @@ RemoveObjects(DropStmt *stmt)
 			ReleaseSysCache(tup);
 		}
 
-		/*
-		 * Prevent the drop of a temporary schema, be it owned by the current
-		 * session or another backend as this would mess up with the callback
-		 * registered to clean up temporary objects at the end of a session.
-		 * Note also that the creation of any follow-up temporary object would
-		 * result in inconsistencies within the session whose temporary schema
-		 * has been dropped.
-		 */
-		if (stmt->removeType == OBJECT_SCHEMA &&
-			isAnyTempNamespace(address.objectId))
-			ereport(ERROR,
-					(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-					 errmsg("cannot drop temporary schema \"%s\"",
-							get_namespace_name(address.objectId))));
-
 		/* Check permissions. */
 		namespaceId = get_object_namespace(&address);
 		if (!OidIsValid(namespaceId) ||
