Get rid of the separate RULE privilege for tables: now only a table's owner

can create or modify rules for the table.  Do setRuleCheckAsUser() while
loading rules into the relcache, rather than when defining a rule.  This
ensures that permission checks for tables referenced in a rule are done with
respect to the current owner of the rule's table, whereas formerly ALTER TABLE
OWNER would fail to update the permission checking for associated rules.
Removal of separate RULE privilege is needed to prevent various scenarios
in which a grantee of RULE privilege could effectively have any privilege
of the table owner.  For backwards compatibility, GRANT/REVOKE RULE is still
accepted, but it doesn't do anything.  Per discussion here:
http://archives.postgresql.org/pgsql-hackers/2006-04/msg01138.php

doc/src/sgml/ddl.sgml

-<!-- $PostgreSQL: pgsql/doc/src/sgml/ddl.sgml,v 1.60 2006/07/14 00:13:05 neilc Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/ddl.sgml,v 1.61 2006/09/05 21:08:33 tgl Exp $ -->
 
 <chapter id="ddl">
  <title>Data Definition</title>
@@ -1342,7 +1342,7 @@ ALTER TABLE products RENAME TO items;
   <para>
    There are several different privileges: <literal>SELECT</>,
    <literal>INSERT</>, <literal>UPDATE</>, <literal>DELETE</>,
-   <literal>RULE</>, <literal>REFERENCES</>, <literal>TRIGGER</>,
+   <literal>REFERENCES</>, <literal>TRIGGER</>,
    <literal>CREATE</>, <literal>CONNECT</>, <literal>TEMPORARY</>,
    <literal>EXECUTE</>, and <literal>USAGE</>.
    The privileges applicable to a particular

doc/src/sgml/func.sgml

-<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.333 2006/09/04 21:47:25 momjian Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.334 2006/09/05 21:08:33 tgl Exp $ -->
 
  <chapter id="functions">
   <title>Functions and Operators</title>
@@ -9543,9 +9543,10 @@ SELECT has_function_privilege('joeuser', 'myfunc(int, text)', 'execute');
     the name can be schema-qualified if necessary.
     The desired access privilege type
     is specified by a text string, which must evaluate to one of the
-    values <literal>SELECT</literal>, <literal>INSERT</literal>, <literal>UPDATE</literal>,
-    <literal>DELETE</literal>, <literal>RULE</literal>, <literal>REFERENCES</literal>, or
-    <literal>TRIGGER</literal>.  (Case of the string is not significant, however.)
+    values <literal>SELECT</literal>, <literal>INSERT</literal>,
+    <literal>UPDATE</literal>, <literal>DELETE</literal>,
+    <literal>REFERENCES</literal>, or <literal>TRIGGER</literal>.
+    (Case of the string is not significant, however.)
     An example is:
 <programlisting>
 SELECT has_table_privilege('myschema.mytable', 'select');

doc/src/sgml/information_schema.sgml

-<!-- $PostgreSQL: pgsql/doc/src/sgml/information_schema.sgml,v 1.26 2006/05/02 18:07:51 tgl Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/information_schema.sgml,v 1.27 2006/09/05 21:08:34 tgl Exp $ -->
 
 <chapter id="information-schema">
  <title>The Information Schema</title>
@@ -2832,7 +2832,7 @@ ORDER BY c.ordinal_position;
        Type of the privilege: <literal>SELECT</literal>,
        <literal>DELETE</literal>, <literal>INSERT</literal>,
        <literal>UPDATE</literal>, <literal>REFERENCES</literal>,
-       <literal>RULE</literal>, or <literal>TRIGGER</literal>
+       or <literal>TRIGGER</literal>
       </entry>
      </row>
 
@@ -4418,7 +4418,7 @@ ORDER BY c.ordinal_position;
        Type of the privilege: <literal>SELECT</literal>,
        <literal>DELETE</literal>, <literal>INSERT</literal>,
        <literal>UPDATE</literal>, <literal>REFERENCES</literal>,
-       <literal>RULE</literal>, or <literal>TRIGGER</literal>
+       or <literal>TRIGGER</literal>
       </entry>
      </row>
 

doc/src/sgml/ref/create_rule.sgml

 <!--
-$PostgreSQL: pgsql/doc/src/sgml/ref/create_rule.sgml,v 1.46 2006/09/02 17:06:52 tgl Exp $
+$PostgreSQL: pgsql/doc/src/sgml/ref/create_rule.sgml,v 1.47 2006/09/05 21:08:35 tgl Exp $
 PostgreSQL documentation
 -->
 
@@ -200,8 +200,7 @@ CREATE [ OR REPLACE ] RULE <replaceable class="parameter">name</replaceable> AS
   <title>Notes</title>
 
   <para>
-   You must have the privilege <literal>RULE</literal> on a table to
-   be allowed to define a rule on it.
+   You must be the owner of a table to create or change rules for it.
   </para>
 
   <para>

doc/src/sgml/ref/grant.sgml

 <!--
-$PostgreSQL: pgsql/doc/src/sgml/ref/grant.sgml,v 1.60 2006/08/02 16:29:49 tgl Exp $
+$PostgreSQL: pgsql/doc/src/sgml/ref/grant.sgml,v 1.61 2006/09/05 21:08:35 tgl Exp $
 PostgreSQL documentation
 -->
 
@@ -20,7 +20,7 @@ PostgreSQL documentation
 
  <refsynopsisdiv>
 <synopsis>
-GRANT { { SELECT | INSERT | UPDATE | DELETE | RULE | REFERENCES | TRIGGER }
+GRANT { { SELECT | INSERT | UPDATE | DELETE | REFERENCES | TRIGGER }
     [,...] | ALL [ PRIVILEGES ] }
     ON [ TABLE ] <replaceable class="PARAMETER">tablename</replaceable> [, ...]
     TO { <replaceable class="PARAMETER">username</replaceable> | GROUP <replaceable class="PARAMETER">groupname</replaceable> | PUBLIC } [, ...] [ WITH GRANT OPTION ]
@@ -178,16 +178,6 @@ GRANT <replaceable class="PARAMETER">role</replaceable> [, ...] TO <replaceable
      </listitem>
     </varlistentry>
 
-    <varlistentry>
-     <term>RULE</term>
-     <listitem>
-      <para>
-       Allows the creation of a rule on the table/view.  (See the <xref
-       linkend="sql-createrule" endterm="sql-createrule-title"> statement.)
-      </para>
-     </listitem>
-    </varlistentry>
-
     <varlistentry>
      <term>REFERENCES</term>
      <listitem>
@@ -418,8 +408,8 @@ GRANT <replaceable class="PARAMETER">role</replaceable> [, ...] TO <replaceable
 
                         Access privileges for database "lusitania"
  Schema |  Name   | Type  |                     Access privileges
---------+---------+-------+------------------------------------------------------------
- public | mytable | table | {miriam=arwdRxt/miriam,=r/miriam,"group todos=arw/miriam"}
+--------+---------+-------+-----------------------------------------------------------
+ public | mytable | table | {miriam=arwdxt/miriam,=r/miriam,"group todos=arw/miriam"}
 (1 row)
 </programlisting>
     The entries shown by <command>\z</command> are interpreted thus:
@@ -432,7 +422,6 @@ GRANT <replaceable class="PARAMETER">role</replaceable> [, ...] TO <replaceable
                   w -- UPDATE ("write")
                   a -- INSERT ("append")
                   d -- DELETE
-                  R -- RULE
                   x -- REFERENCES
                   t -- TRIGGER
                   X -- EXECUTE
@@ -440,7 +429,7 @@ GRANT <replaceable class="PARAMETER">role</replaceable> [, ...] TO <replaceable
                   C -- CREATE
                   c -- CONNECT
                   T -- TEMPORARY
-            arwdRxt -- ALL PRIVILEGES (for tables)
+             arwdxt -- ALL PRIVILEGES (for tables)
                   * -- grant option for preceding privilege
 
               /yyyy -- user who granted this privilege
@@ -463,7 +452,7 @@ and may include some privileges for <literal>PUBLIC</> depending on the
 object type, as explained above.  The first <command>GRANT</> or
 <command>REVOKE</> on an object
 will instantiate the default privileges (producing, for example,
-<literal>{miriam=arwdRxt/miriam}</>) and then modify them per the
+<literal>{miriam=arwdxt/miriam}</>) and then modify them per the
 specified request.
    </para>
 
@@ -548,8 +537,7 @@ GRANT <replaceable class="PARAMETER">privileges</replaceable>
    </para>
 
    <para>
-    The <literal>RULE</literal> privilege, and privileges on
-    databases, tablespaces, schemas, and languages are
+    Privileges on databases, tablespaces, schemas, and languages are
     <productname>PostgreSQL</productname> extensions.
    </para>
  </refsect1>

doc/src/sgml/ref/revoke.sgml

 <!--
-$PostgreSQL: pgsql/doc/src/sgml/ref/revoke.sgml,v 1.39 2006/08/02 16:29:49 tgl Exp $
+$PostgreSQL: pgsql/doc/src/sgml/ref/revoke.sgml,v 1.40 2006/09/05 21:08:35 tgl Exp $
 PostgreSQL documentation
 -->
 
@@ -21,7 +21,7 @@ PostgreSQL documentation
  <refsynopsisdiv>
 <synopsis>
 REVOKE [ GRANT OPTION FOR ]
-    { { SELECT | INSERT | UPDATE | DELETE | RULE | REFERENCES | TRIGGER }
+    { { SELECT | INSERT | UPDATE | DELETE | REFERENCES | TRIGGER }
     [,...] | ALL [ PRIVILEGES ] }
     ON [ TABLE ] <replaceable class="PARAMETER">tablename</replaceable> [, ...]
     FROM { <replaceable class="PARAMETER">username</replaceable> | GROUP <replaceable class="PARAMETER">groupname</replaceable> | PUBLIC } [, ...]

doc/src/sgml/user-manag.sgml

-<!-- $PostgreSQL: pgsql/doc/src/sgml/user-manag.sgml,v 1.36 2006/08/02 16:29:49 tgl Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/user-manag.sgml,v 1.37 2006/09/05 21:08:34 tgl Exp $ -->
 
 <chapter id="user-manag">
  <title>Database Roles and Privileges</title>
@@ -293,7 +293,7 @@ ALTER ROLE myname SET enable_indexscan TO off;
    granted.
    There are several different kinds of privilege: <literal>SELECT</>,
    <literal>INSERT</>, <literal>UPDATE</>, <literal>DELETE</>,
-   <literal>RULE</>, <literal>REFERENCES</>, <literal>TRIGGER</>,
+   <literal>REFERENCES</>, <literal>TRIGGER</>,
    <literal>CREATE</>, <literal>CONNECT</>, <literal>TEMPORARY</>,
    <literal>EXECUTE</>, and <literal>USAGE</>.
    For more information on the different types of privileges supported by

src/backend/catalog/aclchk.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/catalog/aclchk.c,v 1.130 2006/07/14 14:52:17 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/catalog/aclchk.c,v 1.131 2006/09/05 21:08:35 tgl Exp $
  *
  * NOTES
  *	  See acl.h.
@@ -1328,8 +1328,6 @@ string_to_privilege(const char *privname)
 		return ACL_UPDATE;
 	if (strcmp(privname, "delete") == 0)
 		return ACL_DELETE;
-	if (strcmp(privname, "rule") == 0)
-		return ACL_RULE;
 	if (strcmp(privname, "references") == 0)
 		return ACL_REFERENCES;
 	if (strcmp(privname, "trigger") == 0)
@@ -1346,6 +1344,8 @@ string_to_privilege(const char *privname)
 		return ACL_CREATE_TEMP;
 	if (strcmp(privname, "connect") == 0)
 		return ACL_CONNECT;
+	if (strcmp(privname, "rule") == 0)
+		return 0;				/* ignore old RULE privileges */
 	ereport(ERROR,
 			(errcode(ERRCODE_SYNTAX_ERROR),
 			 errmsg("unrecognized privilege type \"%s\"", privname)));
@@ -1365,8 +1365,6 @@ privilege_to_string(AclMode privilege)
 			return "UPDATE";
 		case ACL_DELETE:
 			return "DELETE";
-		case ACL_RULE:
-			return "RULE";
 		case ACL_REFERENCES:
 			return "REFERENCES";
 		case ACL_TRIGGER:

src/backend/catalog/information_schema.sql

@@ -4,7 +4,7 @@
  *
  * Copyright (c) 2003-2006, PostgreSQL Global Development Group
  *
- * $PostgreSQL: pgsql/src/backend/catalog/information_schema.sql,v 1.35 2006/09/04 23:13:01 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/catalog/information_schema.sql,v 1.36 2006/09/05 21:08:35 tgl Exp $
  */
 
 /*
@@ -1194,7 +1194,6 @@ CREATE VIEW role_table_grants AS
           SELECT 'INSERT' UNION ALL
           SELECT 'UPDATE' UNION ALL
           SELECT 'REFERENCES' UNION ALL
-          SELECT 'RULE' UNION ALL
           SELECT 'TRIGGER') AS pr (type)
 
     WHERE c.relnamespace = nc.oid
@@ -1705,7 +1704,6 @@ CREATE VIEW table_constraints AS
                OR has_table_privilege(r.oid, 'INSERT')
                OR has_table_privilege(r.oid, 'UPDATE')
                OR has_table_privilege(r.oid, 'DELETE')
-               OR has_table_privilege(r.oid, 'RULE')
                OR has_table_privilege(r.oid, 'REFERENCES')
                OR has_table_privilege(r.oid, 'TRIGGER') )
 
@@ -1739,7 +1737,6 @@ CREATE VIEW table_constraints AS
                OR has_table_privilege(r.oid, 'INSERT')
                OR has_table_privilege(r.oid, 'UPDATE')
                OR has_table_privilege(r.oid, 'DELETE')
-               OR has_table_privilege(r.oid, 'RULE')
                OR has_table_privilege(r.oid, 'REFERENCES')
                OR has_table_privilege(r.oid, 'TRIGGER') );
 
@@ -1785,7 +1782,6 @@ CREATE VIEW table_privileges AS
           SELECT 'INSERT' UNION ALL
           SELECT 'UPDATE' UNION ALL
           SELECT 'REFERENCES' UNION ALL
-          SELECT 'RULE' UNION ALL
           SELECT 'TRIGGER') AS pr (type)
 
     WHERE c.relnamespace = nc.oid
@@ -1841,7 +1837,6 @@ CREATE VIEW tables AS
                OR has_table_privilege(c.oid, 'INSERT')
                OR has_table_privilege(c.oid, 'UPDATE')
                OR has_table_privilege(c.oid, 'DELETE')
-               OR has_table_privilege(c.oid, 'RULE')
                OR has_table_privilege(c.oid, 'REFERENCES')
                OR has_table_privilege(c.oid, 'TRIGGER') );
 
@@ -1963,7 +1958,6 @@ CREATE VIEW triggers AS
                OR has_table_privilege(c.oid, 'INSERT')
                OR has_table_privilege(c.oid, 'UPDATE')
                OR has_table_privilege(c.oid, 'DELETE')
-               OR has_table_privilege(c.oid, 'RULE')
                OR has_table_privilege(c.oid, 'REFERENCES')
                OR has_table_privilege(c.oid, 'TRIGGER') );
 
@@ -2162,7 +2156,6 @@ CREATE VIEW views AS
                OR has_table_privilege(c.oid, 'INSERT')
                OR has_table_privilege(c.oid, 'UPDATE')
                OR has_table_privilege(c.oid, 'DELETE')
-               OR has_table_privilege(c.oid, 'RULE')
                OR has_table_privilege(c.oid, 'REFERENCES')
                OR has_table_privilege(c.oid, 'TRIGGER') );
 

src/backend/commands/comment.c

@@ -7,7 +7,7 @@
  * Copyright (c) 1996-2006, PostgreSQL Global Development Group
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/commands/comment.c,v 1.90 2006/07/14 14:52:18 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/commands/comment.c,v 1.91 2006/09/05 21:08:35 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -741,7 +741,6 @@ CommentRule(List *qualname, char *comment)
 	HeapTuple	tuple;
 	Oid			reloid;
 	Oid			ruleoid;
-	AclResult	aclcheck;
 
 	/* Separate relname and trig name */
 	nnames = list_length(qualname);
@@ -819,9 +818,8 @@ CommentRule(List *qualname, char *comment)
 	}
 
 	/* Check object security */
-	aclcheck = pg_class_aclcheck(reloid, GetUserId(), ACL_RULE);
-	if (aclcheck != ACLCHECK_OK)
-		aclcheck_error(aclcheck, ACL_KIND_CLASS,
+	if (!pg_class_ownercheck(reloid, GetUserId()))
+		aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_CLASS,
 					   get_rel_name(reloid));
 
 	/* Call CreateComments() to create/drop the comments */

src/backend/rewrite/rewriteDefine.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/rewrite/rewriteDefine.c,v 1.113 2006/09/02 17:06:52 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/rewrite/rewriteDefine.c,v 1.114 2006/09/05 21:08:35 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -33,9 +33,8 @@
 
 static void checkRuleResultList(List *targetList, TupleDesc resultDesc,
 								bool isSelect);
-static void setRuleCheckAsUser_Query(Query *qry, Oid userid);
-static void setRuleCheckAsUser_Expr(Node *node, Oid userid);
 static bool setRuleCheckAsUser_walker(Node *node, Oid *context);
+static void setRuleCheckAsUser_Query(Query *qry, Oid userid);
 
 
 /*
@@ -193,7 +192,6 @@ DefineQueryRewrite(RuleStmt *stmt)
 	int			event_attno;
 	ListCell   *l;
 	Query	   *query;
-	AclResult	aclresult;
 	bool		RelisBecomingView = false;
 
 	/*
@@ -209,9 +207,8 @@ DefineQueryRewrite(RuleStmt *stmt)
 	/*
 	 * Check user has permission to apply rules to this relation.
 	 */
-	aclresult = pg_class_aclcheck(ev_relid, GetUserId(), ACL_RULE);
-	if (aclresult != ACLCHECK_OK)
-		aclcheck_error(aclresult, ACL_KIND_CLASS,
+	if (!pg_class_ownercheck(ev_relid, GetUserId()))
+		aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_CLASS,
 					   RelationGetRelationName(event_relation));
 
 	/*
@@ -411,19 +408,6 @@ DefineQueryRewrite(RuleStmt *stmt)
 	 */
 	event_attno = -1;
 
-	/*
-	 * We want the rule's table references to be checked as though by the rule
-	 * owner, not the user referencing the rule.  Therefore, scan through the
-	 * rule's rtables and set the checkAsUser field on all rtable entries.  We
-	 * have to look at event_qual as well, in case it contains sublinks.
-	 */
-	foreach(l, action)
-	{
-		query = (Query *) lfirst(l);
-		setRuleCheckAsUser_Query(query, GetUserId());
-	}
-	setRuleCheckAsUser_Expr(event_qual, GetUserId());
-
 	/* discard rule if it's null action and not INSTEAD; it's a no-op */
 	if (action != NIL || is_instead)
 	{
@@ -554,9 +538,9 @@ checkRuleResultList(List *targetList, TupleDesc resultDesc, bool isSelect)
 }
 
 /*
- * setRuleCheckAsUser_Query
- *		Recursively scan a query and set the checkAsUser field to the
- *		given userid in all rtable entries.
+ * setRuleCheckAsUser
+ *		Recursively scan a query or expression tree and set the checkAsUser
+ *		field to the given userid in all rtable entries.
  *
  * Note: for a view (ON SELECT rule), the checkAsUser field of the *OLD*
  * RTE entry will be overridden when the view rule is expanded, and the
@@ -565,6 +549,26 @@ checkRuleResultList(List *targetList, TupleDesc resultDesc, bool isSelect)
  * it's important to set these fields to match the rule owner.  So we just set
  * them always.
  */
+void
+setRuleCheckAsUser(Node *node, Oid userid)
+{
+	(void) setRuleCheckAsUser_walker(node, &userid);
+}
+
+static bool
+setRuleCheckAsUser_walker(Node *node, Oid *context)
+{
+	if (node == NULL)
+		return false;
+	if (IsA(node, Query))
+	{
+		setRuleCheckAsUser_Query((Query *) node, *context);
+		return false;
+	}
+	return expression_tree_walker(node, setRuleCheckAsUser_walker,
+								  (void *) context);
+}
+
 static void
 setRuleCheckAsUser_Query(Query *qry, Oid userid)
 {
@@ -591,31 +595,6 @@ setRuleCheckAsUser_Query(Query *qry, Oid userid)
 						  QTW_IGNORE_RT_SUBQUERIES);
 }
 
-/*
- * Expression-tree walker to find sublink queries
- */
-static void
-setRuleCheckAsUser_Expr(Node *node, Oid userid)
-{
-	(void) setRuleCheckAsUser_walker(node, &userid);
-}
-
-static bool
-setRuleCheckAsUser_walker(Node *node, Oid *context)
-{
-	if (node == NULL)
-		return false;
-	if (IsA(node, Query))
-	{
-		Query	   *qry = (Query *) node;
-
-		setRuleCheckAsUser_Query(qry, *context);
-		return false;
-	}
-	return expression_tree_walker(node, setRuleCheckAsUser_walker,
-								  (void *) context);
-}
-
 
 /*
  * Rename an existing rewrite rule.

src/backend/rewrite/rewriteRemove.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/rewrite/rewriteRemove.c,v 1.65 2006/06/16 20:23:44 adunstan Exp $
+ *	  $PostgreSQL: pgsql/src/backend/rewrite/rewriteRemove.c,v 1.66 2006/09/05 21:08:36 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -39,7 +39,6 @@ RemoveRewriteRule(Oid owningRel, const char *ruleName, DropBehavior behavior,
 {
 	HeapTuple	tuple;
 	Oid			eventRelationOid;
-	AclResult	aclresult;
 	ObjectAddress object;
 
 	/*
@@ -72,9 +71,8 @@ RemoveRewriteRule(Oid owningRel, const char *ruleName, DropBehavior behavior,
 	 */
 	eventRelationOid = ((Form_pg_rewrite) GETSTRUCT(tuple))->ev_class;
 	Assert(eventRelationOid == owningRel);
-	aclresult = pg_class_aclcheck(eventRelationOid, GetUserId(), ACL_RULE);
-	if (aclresult != ACLCHECK_OK)
-		aclcheck_error(aclresult, ACL_KIND_CLASS,
+	if (!pg_class_ownercheck(eventRelationOid, GetUserId()))
+		aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_CLASS,
 					   get_rel_name(eventRelationOid));
 
 	/*

src/backend/utils/adt/acl.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/acl.c,v 1.134 2006/07/14 14:52:23 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/acl.c,v 1.135 2006/09/05 21:08:36 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -265,9 +265,6 @@ aclparse(const char *s, AclItem *aip)
 			case ACL_DELETE_CHR:
 				read = ACL_DELETE;
 				break;
-			case ACL_RULE_CHR:
-				read = ACL_RULE;
-				break;
 			case ACL_REFERENCES_CHR:
 				read = ACL_REFERENCES;
 				break;
@@ -289,6 +286,9 @@ aclparse(const char *s, AclItem *aip)
 			case ACL_CONNECT_CHR:
 				read = ACL_CONNECT;
 				break;
+			case 'R':			/* ignore old RULE privileges */
+				read = 0;
+				break;
 			default:
 				ereport(ERROR,
 						(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
@@ -1325,8 +1325,6 @@ convert_priv_string(text *priv_type_text)
 		return ACL_UPDATE;
 	if (pg_strcasecmp(priv_type, "DELETE") == 0)
 		return ACL_DELETE;
-	if (pg_strcasecmp(priv_type, "RULE") == 0)
-		return ACL_RULE;
 	if (pg_strcasecmp(priv_type, "REFERENCES") == 0)
 		return ACL_REFERENCES;
 	if (pg_strcasecmp(priv_type, "TRIGGER") == 0)
@@ -1343,6 +1341,8 @@ convert_priv_string(text *priv_type_text)
 		return ACL_CREATE_TEMP;
 	if (pg_strcasecmp(priv_type, "CONNECT") == 0)
 		return ACL_CONNECT;
+	if (pg_strcasecmp(priv_type, "RULE") == 0)
+		return 0;				/* ignore old RULE privileges */
 
 	ereport(ERROR,
 			(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
@@ -1553,11 +1553,6 @@ convert_table_priv_string(text *priv_type_text)
 	if (pg_strcasecmp(priv_type, "DELETE WITH GRANT OPTION") == 0)
 		return ACL_GRANT_OPTION_FOR(ACL_DELETE);
 
-	if (pg_strcasecmp(priv_type, "RULE") == 0)
-		return ACL_RULE;
-	if (pg_strcasecmp(priv_type, "RULE WITH GRANT OPTION") == 0)
-		return ACL_GRANT_OPTION_FOR(ACL_RULE);
-
 	if (pg_strcasecmp(priv_type, "REFERENCES") == 0)
 		return ACL_REFERENCES;
 	if (pg_strcasecmp(priv_type, "REFERENCES WITH GRANT OPTION") == 0)
@@ -1568,6 +1563,11 @@ convert_table_priv_string(text *priv_type_text)
 	if (pg_strcasecmp(priv_type, "TRIGGER WITH GRANT OPTION") == 0)
 		return ACL_GRANT_OPTION_FOR(ACL_TRIGGER);
 
+	if (pg_strcasecmp(priv_type, "RULE") == 0)
+		return 0;				/* ignore old RULE privileges */
+	if (pg_strcasecmp(priv_type, "RULE WITH GRANT OPTION") == 0)
+		return 0;
+
 	ereport(ERROR,
 			(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
 			 errmsg("unrecognized privilege type: \"%s\"", priv_type)));

src/backend/utils/cache/relcache.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/cache/relcache.c,v 1.247 2006/07/31 20:09:05 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/cache/relcache.c,v 1.248 2006/09/05 21:08:36 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -51,6 +51,7 @@
 #include "optimizer/clauses.h"
 #include "optimizer/planmain.h"
 #include "optimizer/prep.h"
+#include "rewrite/rewriteDefine.h"
 #include "storage/fd.h"
 #include "storage/smgr.h"
 #include "utils/builtins.h"
@@ -683,6 +684,22 @@ RelationBuildRuleLock(Relation relation)
 		if ((Pointer) rule_text != DatumGetPointer(rule_datum))
 			pfree(rule_text);
 
+		/*
+		 * We want the rule's table references to be checked as though by the
+		 * table owner, not the user referencing the rule.  Therefore, scan
+		 * through the rule's actions and set the checkAsUser field on all
+		 * rtable entries.  We have to look at the qual as well, in case it
+		 * contains sublinks.
+		 *
+		 * The reason for doing this when the rule is loaded, rather than
+		 * when it is stored, is that otherwise ALTER TABLE OWNER would have
+		 * to grovel through stored rules to update checkAsUser fields.
+		 * Scanning the rule tree during load is relatively cheap (compared
+		 * to constructing it in the first place), so we do it here.
+		 */
+		setRuleCheckAsUser((Node *) rule->actions, relation->rd_rel->relowner);
+		setRuleCheckAsUser(rule->qual, relation->rd_rel->relowner);
+
 		if (numlocks >= maxlocks)
 		{
 			maxlocks *= 2;

src/include/catalog/catversion.h

@@ -37,7 +37,7 @@
  * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/catalog/catversion.h,v 1.353 2006/08/25 04:06:54 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/catversion.h,v 1.354 2006/09/05 21:08:36 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -53,6 +53,6 @@
  */
 
 /*							yyyymmddN */
-#define CATALOG_VERSION_NO	200608211
+#define CATALOG_VERSION_NO	200609051
 
 #endif

src/include/nodes/parsenodes.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/nodes/parsenodes.h,v 1.329 2006/09/03 03:19:45 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/nodes/parsenodes.h,v 1.330 2006/09/05 21:08:36 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -50,7 +50,7 @@ typedef uint32 AclMode;			/* a bitmask of privilege bits */
 #define ACL_SELECT		(1<<1)
 #define ACL_UPDATE		(1<<2)
 #define ACL_DELETE		(1<<3)
-#define ACL_RULE		(1<<4)
+/* #define ACL_RULE		(1<<4)	unused, available */
 #define ACL_REFERENCES	(1<<5)
 #define ACL_TRIGGER		(1<<6)
 #define ACL_EXECUTE		(1<<7)	/* for functions */

src/include/rewrite/rewriteDefine.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/rewrite/rewriteDefine.h,v 1.21 2006/03/05 15:58:58 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/rewrite/rewriteDefine.h,v 1.22 2006/09/05 21:08:36 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -21,4 +21,6 @@ extern void DefineQueryRewrite(RuleStmt *args);
 extern void RenameRewriteRule(Oid owningRel, const char *oldName,
 				  const char *newName);
 
+extern void setRuleCheckAsUser(Node *node, Oid userid);
+
 #endif   /* REWRITEDEFINE_H */

src/include/utils/acl.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/utils/acl.h,v 1.96 2006/05/03 22:45:26 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/utils/acl.h,v 1.97 2006/09/05 21:08:36 tgl Exp $
  *
  * NOTES
  *	  An ACL array is simply an array of AclItems, representing the union
@@ -128,7 +128,6 @@ typedef ArrayType Acl;
 #define ACL_SELECT_CHR			'r'		/* formerly known as "read" */
 #define ACL_UPDATE_CHR			'w'		/* formerly known as "write" */
 #define ACL_DELETE_CHR			'd'
-#define ACL_RULE_CHR			'R'
 #define ACL_REFERENCES_CHR		'x'
 #define ACL_TRIGGER_CHR			't'
 #define ACL_EXECUTE_CHR			'X'
@@ -143,7 +142,7 @@ typedef ArrayType Acl;
 /*
  * Bitmasks defining "all rights" for each supported object type
  */
-#define ACL_ALL_RIGHTS_RELATION		(ACL_INSERT|ACL_SELECT|ACL_UPDATE|ACL_DELETE|ACL_RULE|ACL_REFERENCES|ACL_TRIGGER)
+#define ACL_ALL_RIGHTS_RELATION		(ACL_INSERT|ACL_SELECT|ACL_UPDATE|ACL_DELETE|ACL_REFERENCES|ACL_TRIGGER)
 #define ACL_ALL_RIGHTS_SEQUENCE		(ACL_USAGE|ACL_SELECT|ACL_UPDATE)
 #define ACL_ALL_RIGHTS_DATABASE		(ACL_CREATE|ACL_CREATE_TEMP|ACL_CONNECT)
 #define ACL_ALL_RIGHTS_FUNCTION		(ACL_EXECUTE)

src/test/regress/expected/dependency.out

@@ -68,19 +68,19 @@ NOTICE:  CREATE TABLE / PRIMARY KEY will create implicit index "deptest_pkey" fo
 GRANT ALL ON deptest1 TO regression_user2;
 RESET SESSION AUTHORIZATION;
 \z deptest1
-                                                            Access privileges for database "regression"
- Schema |   Name   | Type  |                                                           Access privileges                                                            
---------+----------+-------+----------------------------------------------------------------------------------------------------------------------------------------
- public | deptest1 | table | {regression_user0=arwdRxt/regression_user0,regression_user1=a*r*w*d*R*x*t*/regression_user0,regression_user2=arwdRxt/regression_user1}
+                                                          Access privileges for database "regression"
+ Schema |   Name   | Type  |                                                         Access privileges                                                          
+--------+----------+-------+------------------------------------------------------------------------------------------------------------------------------------
+ public | deptest1 | table | {regression_user0=arwdxt/regression_user0,regression_user1=a*r*w*d*x*t*/regression_user0,regression_user2=arwdxt/regression_user1}
 (1 row)
 
 DROP OWNED BY regression_user1;
 -- all grants revoked
 \z deptest1
-               Access privileges for database "regression"
- Schema |   Name   | Type  |              Access privileges              
---------+----------+-------+---------------------------------------------
- public | deptest1 | table | {regression_user0=arwdRxt/regression_user0}
+              Access privileges for database "regression"
+ Schema |   Name   | Type  |             Access privileges              
+--------+----------+-------+--------------------------------------------
+ public | deptest1 | table | {regression_user0=arwdxt/regression_user0}
 (1 row)
 
 -- table was dropped

src/test/regress/expected/privileges.out

@@ -301,7 +301,7 @@ select has_table_privilege('pg_authid','sel');
 ERROR:  unrecognized privilege type: "sel"
 select has_table_privilege(-999999,'pg_authid','update');
 ERROR:  role with OID 4293967297 does not exist
-select has_table_privilege(1,'rule');
+select has_table_privilege(1,'select');
 ERROR:  relation with OID 1 does not exist
 -- superuser
 \c -
@@ -331,11 +331,13 @@ from (select oid from pg_roles where rolname = current_user) as t2;
  t
 (1 row)
 
+-- 'rule' privilege no longer exists, but for backwards compatibility
+-- has_table_privilege still recognizes the keyword and says FALSE
 select has_table_privilege(current_user,t1.oid,'rule')
 from (select oid from pg_class where relname = 'pg_authid') as t1;
  has_table_privilege 
 ---------------------
- t
+ f
 (1 row)
 
 select has_table_privilege(current_user,t1.oid,'references')
@@ -415,13 +417,6 @@ from (select oid from pg_roles where rolname = current_user) as t2;
  f
 (1 row)
 
-select has_table_privilege(current_user,t1.oid,'rule')
-from (select oid from pg_class where relname = 'pg_class') as t1;
- has_table_privilege 
----------------------
- f
-(1 row)
-
 select has_table_privilege(current_user,t1.oid,'references')
 from (select oid from pg_class where relname = 'pg_class') as t1;
  has_table_privilege 
@@ -497,13 +492,6 @@ from (select oid from pg_roles where rolname = current_user) as t2;
  f
 (1 row)
 
-select has_table_privilege(current_user,t1.oid,'rule')
-from (select oid from pg_class where relname = 'atest1') as t1;
- has_table_privilege 
----------------------
- f
-(1 row)
-
 select has_table_privilege(current_user,t1.oid,'references')
 from (select oid from pg_class where relname = 'atest1') as t1;
  has_table_privilege 

src/test/regress/sql/privileges.sql

@@ -214,7 +214,7 @@ select has_table_privilege('pg_shad','select');
 select has_table_privilege('nosuchuser','pg_authid','select');
 select has_table_privilege('pg_authid','sel');
 select has_table_privilege(-999999,'pg_authid','update');
-select has_table_privilege(1,'rule');
+select has_table_privilege(1,'select');
 
 -- superuser
 \c -
@@ -227,6 +227,8 @@ from (select oid from pg_roles where rolname = current_user) as t2;
 select has_table_privilege(t2.oid,'pg_authid','delete')
 from (select oid from pg_roles where rolname = current_user) as t2;
 
+-- 'rule' privilege no longer exists, but for backwards compatibility
+-- has_table_privilege still recognizes the keyword and says FALSE
 select has_table_privilege(current_user,t1.oid,'rule')
 from (select oid from pg_class where relname = 'pg_authid') as t1;
 select has_table_privilege(current_user,t1.oid,'references')
@@ -258,8 +260,6 @@ from (select oid from pg_roles where rolname = current_user) as t2;
 select has_table_privilege(t2.oid,'pg_class','delete')
 from (select oid from pg_roles where rolname = current_user) as t2;
 
-select has_table_privilege(current_user,t1.oid,'rule')
-from (select oid from pg_class where relname = 'pg_class') as t1;
 select has_table_privilege(current_user,t1.oid,'references')
 from (select oid from pg_class where relname = 'pg_class') as t1;
 
@@ -286,8 +286,6 @@ from (select oid from pg_roles where rolname = current_user) as t2;
 select has_table_privilege(t2.oid,'atest1','delete')
 from (select oid from pg_roles where rolname = current_user) as t2;
 
-select has_table_privilege(current_user,t1.oid,'rule')
-from (select oid from pg_class where relname = 'atest1') as t1;
 select has_table_privilege(current_user,t1.oid,'references')
 from (select oid from pg_class where relname = 'atest1') as t1;