Index: base/src/backend/rewrite/rewriteDefine.c
===================================================================
*** base/src/backend/rewrite/rewriteDefine.c	(revision 2559)
--- base/src/backend/rewrite/rewriteDefine.c	(working copy)
*************** setRuleCheckAsUser_Query(Query *qry, Oid
*** 664,669 ****
--- 664,675 ----
  
  /*
   * Change the firing semantics of an existing rule.
+  *
+  * Note that this function applied its own permission checks prior to the
+  * v8.5 relase. But, currently, it had gone because of its redundancy.
+  * This operation needs identical privileges to alter properties of the
+  * table owning the rewrite rules to be modified. All the code path of
+  * this function already checks it in the ATPrepCmd().
   */
  void
  EnableDisableRule(Relation rel, const char *rulename,
*************** EnableDisableRule(Relation rel, const ch
*** 671,677 ****
  {
  	Relation	pg_rewrite_desc;
  	Oid			owningRel = RelationGetRelid(rel);
- 	Oid			eventRelationOid;
  	HeapTuple	ruletup;
  	bool		changed = false;
  
--- 677,682 ----
*************** EnableDisableRule(Relation rel, const ch
*** 690,704 ****
  						rulename, get_rel_name(owningRel))));
  
  	/*
- 	 * Verify that the user has appropriate permissions.
- 	 */
- 	eventRelationOid = ((Form_pg_rewrite) GETSTRUCT(ruletup))->ev_class;
- 	Assert(eventRelationOid == owningRel);
- 	if (!pg_class_ownercheck(eventRelationOid, GetUserId()))
- 		aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_CLASS,
- 					   get_rel_name(eventRelationOid));
- 
- 	/*
  	 * Change ev_enabled if it is different from the desired new state.
  	 */
  	if (DatumGetChar(((Form_pg_rewrite) GETSTRUCT(ruletup))->ev_enabled) !=
--- 695,700 ----