Rule names are now unique per-relation, rather than unique globally.

DROP RULE and COMMENT ON RULE syntax adds an 'ON tablename' clause,
similar to TRIGGER syntaxes.  To allow loading of existing pg_dump
files containing COMMENT ON RULE, the COMMENT code will still accept
the old syntax --- but only if the target rulename is unique across
the whole database.

doc/src/sgml/func.sgml

@@ -1,5 +1,5 @@
 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/func.sgml,v 1.94 2002/03/22 19:20:09 petere Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/func.sgml,v 1.95 2002/04/18 20:01:08 tgl Exp $
 PostgreSQL documentation
 -->
 
@@ -4344,7 +4344,12 @@ SELECT NULLIF(value, '(none)') ...
        <entry>Get CREATE VIEW command for view</>
       </row>
       <row>
-       <entry><function>pg_get_ruledef</>(<parameter>rulename</parameter>)</entry>
+       <entry><function>pg_get_viewdef</>(<parameter>viewOID</parameter>)</entry>
+       <entry><type>text</></entry>
+       <entry>Get CREATE VIEW command for view</>
+      </row>
+      <row>
+       <entry><function>pg_get_ruledef</>(<parameter>ruleOID</parameter>)</entry>
        <entry><type>text</></entry>
        <entry>Get CREATE RULE command for rule</>
       </row>

doc/src/sgml/ref/comment.sgml

@@ -1,5 +1,5 @@
 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/ref/comment.sgml,v 1.15 2002/03/19 02:18:12 momjian Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/ref/comment.sgml,v 1.16 2002/04/18 20:01:09 tgl Exp $
 PostgreSQL documentation
 -->
 
@@ -25,11 +25,12 @@ PostgreSQL documentation
   <synopsis>
 COMMENT ON
 [
-  [ DATABASE | DOMAIN | INDEX | RULE | SEQUENCE | TABLE | TYPE | VIEW ] <replaceable class="PARAMETER">object_name</replaceable> |
+  [ DATABASE | DOMAIN | INDEX | SEQUENCE | TABLE | TYPE | VIEW ] <replaceable class="PARAMETER">object_name</replaceable> |
   COLUMN <replaceable class="PARAMETER">table_name</replaceable>.<replaceable class="PARAMETER">column_name</replaceable> |
   AGGREGATE <replaceable class="PARAMETER">agg_name</replaceable> (<replaceable class="PARAMETER">agg_type</replaceable>) |
   FUNCTION <replaceable class="PARAMETER">func_name</replaceable> (<replaceable class="PARAMETER">arg1</replaceable>, <replaceable class="PARAMETER">arg2</replaceable>, ...) |
   OPERATOR <replaceable class="PARAMETER">op</replaceable> (<replaceable class="PARAMETER">leftoperand_type</replaceable> <replaceable class="PARAMETER">rightoperand_type</replaceable>) |
+  RULE <replaceable class="PARAMETER">rule_name</replaceable> ON <replaceable class="PARAMETER">table_name</replaceable> |
   TRIGGER <replaceable class="PARAMETER">trigger_name</replaceable> ON <replaceable class="PARAMETER">table_name</replaceable>
 ] IS <replaceable class="PARAMETER">'text'</replaceable>
   </synopsis>
@@ -46,7 +47,7 @@ COMMENT ON
     <variablelist>
      <varlistentry>
       <term><replaceable class="PARAMETER">object_name, table_name,
-      column_name, agg_name, func_name, op, trigger_name</replaceable></term>
+      column_name, agg_name, func_name, op, rule_name, trigger_name</replaceable></term>
       <listitem>
        <para>
 	The name of the object to be be commented.
@@ -143,7 +144,6 @@ COMMENT ON mytable IS 'This is my table.';
 COMMENT ON DATABASE my_database IS 'Development Database';
 COMMENT ON DOMAIN my_domain IS 'Email Address Domain';
 COMMENT ON INDEX my_index IS 'Enforces uniqueness on employee id';
-COMMENT ON RULE my_rule IS 'Logs UPDATES of employee records';
 COMMENT ON SEQUENCE my_sequence IS 'Used to generate primary keys';
 COMMENT ON TABLE my_table IS 'Employee Information';
 COMMENT ON TYPE my_type IS 'Complex Number support';
@@ -152,6 +152,7 @@ COMMENT ON COLUMN my_table.my_field IS 'Employee ID number';
 COMMENT ON AGGREGATE my_aggregate (double precision) IS 'Computes sample variance';
 COMMENT ON FUNCTION my_function (timestamp) IS 'Returns Roman Numeral';
 COMMENT ON OPERATOR ^ (text, text) IS 'Performs intersection of two text';
+COMMENT ON RULE my_rule ON my_table IS 'Logs UPDATES of employee records';
 COMMENT ON TRIGGER my_trigger ON my_table IS 'Used for R.I.';
    </programlisting>
   </para>

doc/src/sgml/ref/drop_rule.sgml

@@ -1,5 +1,5 @@
 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_rule.sgml,v 1.11 2001/12/08 03:24:36 thomas Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_rule.sgml,v 1.12 2002/04/18 20:01:09 tgl Exp $
 PostgreSQL documentation
 -->
 
@@ -23,7 +23,7 @@ PostgreSQL documentation
    <date>1998-09-22</date>
   </refsynopsisdivinfo>
   <synopsis>
-DROP RULE <replaceable class="PARAMETER">name</replaceable> [, ...]
+DROP RULE <replaceable class="PARAMETER">name</replaceable> ON <replaceable class="PARAMETER">relation</replaceable>
   </synopsis>
   
   <refsect2 id="R2-SQL-DROPRULE-1">
@@ -43,6 +43,14 @@ DROP RULE <replaceable class="PARAMETER">name</replaceable> [, ...]
        </para>
       </listitem>
      </varlistentry>
+     <varlistentry>
+      <term><replaceable class="parameter">relation</replaceable></term>
+      <listitem>
+       <para>
+	The name of the relation the rule applies to.
+       </para>
+      </listitem>
+     </varlistentry>
     </variablelist>
    </para>
   </refsect2>
@@ -68,7 +76,7 @@ DROP
      </varlistentry>
      <varlistentry>
       <term><computeroutput>
-ERROR:  Rule or view "<replaceable class="parameter">name</replaceable>" not found
+ERROR:  Rule "<replaceable class="parameter">name</replaceable>" not found
        </computeroutput></term>
       <listitem>
        <para>
@@ -113,11 +121,6 @@ ERROR:  Rule or view "<replaceable class="parameter">name</replaceable>" not fou
     Refer to <command>CREATE RULE</command> for
     information on how to create rules.
    </para>
-
-   <para>
-    Once a rule is dropped, access to historical information
-    the rule has written may disappear.
-   </para>
   </refsect2>
  </refsect1>
   
@@ -129,7 +132,7 @@ ERROR:  Rule or view "<replaceable class="parameter">name</replaceable>" not fou
    To drop the rewrite rule <literal>newrule</literal>:
 
    <programlisting>
-DROP RULE newrule;
+DROP RULE newrule ON mytable;
    </programlisting>
   </para>
  </refsect1>

doc/src/sgml/release.sgml

@@ -1,5 +1,5 @@
 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.132 2002/04/10 22:46:48 petere Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.133 2002/04/18 20:01:08 tgl Exp $
 -->
 
 <appendix id="release">
@@ -24,6 +24,7 @@ CDATA means the content is "SGML-free", so you can write without
 worries about funny characters.
 -->
 <literallayout><![CDATA[
+Rule names are now per-relation, not global; DROP RULE and COMMENT ON RULE syntax changes accordingly
 Readline and Zlib are now required by default and must be turned off explicitly if their use is not desired
 Define a third class of function volatility to allow indexscans in more cases
 Locale support is now built by default; choice of locale is set by initdb and/or at run-time

src/backend/catalog/indexing.c

@@ -9,7 +9,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/catalog/indexing.c,v 1.90 2002/04/17 20:57:56 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/catalog/indexing.c,v 1.91 2002/04/18 20:01:09 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -68,7 +68,7 @@ char	   *Name_pg_proc_indices[Num_pg_proc_indices] =
 char	   *Name_pg_relcheck_indices[Num_pg_relcheck_indices] =
 {RelCheckIndex};
 char	   *Name_pg_rewrite_indices[Num_pg_rewrite_indices] =
-{RewriteOidIndex, RewriteRulenameIndex};
+{RewriteOidIndex, RewriteRelRulenameIndex};
 char	   *Name_pg_shadow_indices[Num_pg_shadow_indices] =
 {ShadowNameIndex, ShadowSysidIndex};
 char	   *Name_pg_statistic_indices[Num_pg_statistic_indices] =

src/backend/commands/comment.c

@@ -7,7 +7,7 @@
  * Copyright (c) 1999-2001, PostgreSQL Global Development Group
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/commands/comment.c,v 1.41 2002/04/16 23:08:10 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/commands/comment.c,v 1.42 2002/04/18 20:01:09 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -472,44 +472,105 @@ CommentDatabase(List *qualname, char *comment)
  * CommentRule --
  *
  * This routine is used to add/drop any user-comments a user might
- * have regarding a specified RULE. The rule is specified by name
+ * have regarding a specified RULE. The rule for commenting is determined by
- * and, if found, and the user has appropriate permissions, a
+ * both its name and the relation to which it refers. The arguments to this
- * comment will be added/dropped using the CreateComments() routine.
+ * function are the rule name and relation name (merged into a qualified
+ * name), and the comment to add/drop.
+ *
+ * Before PG 7.3, rules had unique names across the whole database, and so
+ * the syntax was just COMMENT ON RULE rulename, with no relation name.
+ * For purposes of backwards compatibility, we support that as long as there
+ * is only one rule by the specified name in the database.
  */
 static void
 CommentRule(List *qualname, char *comment)
 {
-	char	   *rule;
+	int			nnames;
+	List	   *relname;
+	char	   *rulename;
+	RangeVar   *rel;
+	Relation	relation;
 	HeapTuple	tuple;
 	Oid			reloid;
 	Oid			ruleoid;
 	Oid			classoid;
 	int32		aclcheck;
 
-	/* XXX this is gonna change soon */
+	/* Separate relname and trig name */
-	if (length(qualname) != 1)
+	nnames = length(qualname);
-		elog(ERROR, "CommentRule: rule name may not be qualified");
+	if (nnames == 1)
-	rule = strVal(lfirst(qualname));
+	{
+		/* Old-style: only a rule name is given */
+		Relation	RewriteRelation;
+		HeapScanDesc scanDesc;
+		ScanKeyData scanKeyData;
 
-	/* Find the rule's pg_rewrite tuple, get its OID and its table's OID */
+		rulename = strVal(lfirst(qualname));
 
-	tuple = SearchSysCache(RULENAME,
+		/* Search pg_rewrite for such a rule */
-						   PointerGetDatum(rule),
+		ScanKeyEntryInitialize(&scanKeyData,
-						   0, 0, 0);
+							   0,
-	if (!HeapTupleIsValid(tuple))
+							   Anum_pg_rewrite_rulename,
-		elog(ERROR, "rule '%s' does not exist", rule);
+							   F_NAMEEQ,
+							   PointerGetDatum(rulename));
 
-	reloid = ((Form_pg_rewrite) GETSTRUCT(tuple))->ev_class;
+		RewriteRelation = heap_openr(RewriteRelationName, AccessShareLock);
-	ruleoid = tuple->t_data->t_oid;
+		scanDesc = heap_beginscan(RewriteRelation,
+								  0, SnapshotNow, 1, &scanKeyData);
 
-	ReleaseSysCache(tuple);
+		tuple = heap_getnext(scanDesc, 0);
+		if (HeapTupleIsValid(tuple))
+		{
+			reloid = ((Form_pg_rewrite) GETSTRUCT(tuple))->ev_class;
+			ruleoid = tuple->t_data->t_oid;
+		}
+		else
+		{
+			elog(ERROR, "rule '%s' does not exist", rulename);
+			reloid = ruleoid = 0; /* keep compiler quiet */
+		}
+
+		if (HeapTupleIsValid(tuple = heap_getnext(scanDesc, 0)))
+			elog(ERROR, "There are multiple rules '%s'"
+				 "\n\tPlease specify a relation name as well as a rule name",
+				 rulename);
+
+		heap_endscan(scanDesc);
+		heap_close(RewriteRelation, AccessShareLock);
+
+		/* Open the owning relation to ensure it won't go away meanwhile */
+		relation = heap_open(reloid, AccessShareLock);
+	}
+	else
+	{
+		/* New-style: rule and relname both provided */
+		Assert(nnames >= 2);
+		relname = ltruncate(nnames-1, listCopy(qualname));
+		rulename = strVal(nth(nnames-1, qualname));
+
+		/* Open the owning relation to ensure it won't go away meanwhile */
+		rel = makeRangeVarFromNameList(relname);
+		relation = heap_openrv(rel, AccessShareLock);
+		reloid = RelationGetRelid(relation);
+
+		/* Find the rule's pg_rewrite tuple, get its OID */
+		tuple = SearchSysCache(RULERELNAME,
+							   ObjectIdGetDatum(reloid),
+							   PointerGetDatum(rulename),
+							   0, 0);
+		if (!HeapTupleIsValid(tuple))
+			elog(ERROR, "rule '%s' does not exist", rulename);
+		Assert(reloid == ((Form_pg_rewrite) GETSTRUCT(tuple))->ev_class);
+		ruleoid = tuple->t_data->t_oid;
+		ReleaseSysCache(tuple);
+	}
 
 	/* Check object security */
 
 	aclcheck = pg_class_aclcheck(reloid, GetUserId(), ACL_RULE);
 	if (aclcheck != ACLCHECK_OK)
 		elog(ERROR, "you are not permitted to comment on rule '%s'",
-			 rule);
+			 rulename);
 
 	/* pg_rewrite doesn't have a hard-coded OID, so must look it up */
 

src/backend/commands/tablecmds.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/commands/tablecmds.c,v 1.2 2002/04/15 23:45:07 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/commands/tablecmds.c,v 1.3 2002/04/18 20:01:09 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1423,8 +1423,8 @@ AlterTableCreateToastTable(Oid relOid, bool silent)
 	Relation	ridescs[Num_pg_class_indices];
 	Oid			toast_relid;
 	Oid			toast_idxid;
-	char		toast_relname[NAMEDATALEN + 1];
+	char		toast_relname[NAMEDATALEN];
-	char		toast_idxname[NAMEDATALEN + 1];
+	char		toast_idxname[NAMEDATALEN];
 	IndexInfo  *indexInfo;
 	Oid			classObjectId[2];
 
@@ -1667,7 +1667,7 @@ needs_toast_table(Relation rel)
 Oid
 DefineRelation(CreateStmt *stmt, char relkind)
 {
-	char	   *relname = palloc(NAMEDATALEN);
+	char		relname[NAMEDATALEN];
 	Oid			namespaceId;
 	List	   *schema = stmt->tableElts;
 	int			numberOfAttributes;
@@ -1686,7 +1686,7 @@ DefineRelation(CreateStmt *stmt, char relkind)
 	 * Truncate relname to appropriate length (probably a waste of time,
 	 * as parser should have done this already).
 	 */
-	StrNCpy(relname, (stmt->relation)->relname, NAMEDATALEN);
+	StrNCpy(relname, stmt->relation->relname, NAMEDATALEN);
 
 	/*
 	 * Look up the namespace in which we are supposed to create the
@@ -2642,8 +2642,8 @@ renameatt(Oid relid,
 							 0, 0))
 		elog(ERROR, "renameatt: attribute \"%s\" exists", newattname);
 
-	StrNCpy(NameStr(((Form_pg_attribute) GETSTRUCT(atttup))->attname),
+	namestrcpy(&(((Form_pg_attribute) GETSTRUCT(atttup))->attname),
-			newattname, NAMEDATALEN);
+			   newattname);
 
 	simple_heap_update(attrelation, &atttup->t_self, atttup);
 
@@ -2699,8 +2699,8 @@ renameatt(Oid relid,
 		/*
 		 * Update the (copied) attribute tuple.
 		 */
-		StrNCpy(NameStr(((Form_pg_attribute) GETSTRUCT(atttup))->attname),
+		namestrcpy(&(((Form_pg_attribute) GETSTRUCT(atttup))->attname),
-				newattname, NAMEDATALEN);
+				   newattname);
 
 		simple_heap_update(attrelation, &atttup->t_self, atttup);
 
@@ -2753,6 +2753,7 @@ renamerel(Oid relid, const char *newrelname)
 	Relation	relrelation;	/* for RELATION relation */
 	HeapTuple	reltup;
 	Oid			namespaceId;
+	char	   *oldrelname;
 	char		relkind;
 	bool		relhastriggers;
 	Relation	irelations[Num_pg_class_indices];
@@ -2763,13 +2764,14 @@ renamerel(Oid relid, const char *newrelname)
 	 */
 	targetrelation = relation_open(relid, AccessExclusiveLock);
 
+	oldrelname = pstrdup(RelationGetRelationName(targetrelation));
 	namespaceId = RelationGetNamespace(targetrelation);
 
 	/* Validity checks */
 	if (!allowSystemTableMods &&
 		IsSystemRelation(targetrelation))
 		elog(ERROR, "renamerel: system relation \"%s\" may not be renamed",
-			 RelationGetRelationName(targetrelation));
+			 oldrelname);
 
 	relkind = targetrelation->rd_rel->relkind;
 	relhastriggers = (targetrelation->rd_rel->reltriggers > 0);
@@ -2785,7 +2787,7 @@ renamerel(Oid relid, const char *newrelname)
 								0, 0, 0);
 	if (!HeapTupleIsValid(reltup))
 		elog(ERROR, "renamerel: relation \"%s\" does not exist",
-			 RelationGetRelationName(targetrelation));
+			 oldrelname);
 
 	if (get_relname_relid(newrelname, namespaceId) != InvalidOid)
 		elog(ERROR, "renamerel: relation \"%s\" exists", newrelname);
@@ -2794,8 +2796,7 @@ renamerel(Oid relid, const char *newrelname)
 	 * Update pg_class tuple with new relname.	(Scribbling on reltup is
 	 * OK because it's a copy...)
 	 */
-	StrNCpy(NameStr(((Form_pg_class) GETSTRUCT(reltup))->relname),
+	namestrcpy(&(((Form_pg_class) GETSTRUCT(reltup))->relname), newrelname);
-			newrelname, NAMEDATALEN);
 
 	simple_heap_update(relrelation, &reltup->t_self, reltup);
 
@@ -2811,8 +2812,7 @@ renamerel(Oid relid, const char *newrelname)
 	 * Also rename the associated type, if any.
 	 */
 	if (relkind != RELKIND_INDEX)
-		TypeRename(RelationGetRelationName(targetrelation), namespaceId,
+		TypeRename(oldrelname, namespaceId, newrelname);
-				   newrelname);
 
 	/*
 	 * If it's a view, must also rename the associated ON SELECT rule.
@@ -2822,9 +2822,9 @@ renamerel(Oid relid, const char *newrelname)
 		char	   *oldrulename,
 				   *newrulename;
 
-		oldrulename = MakeRetrieveViewRuleName(RelationGetRelationName(targetrelation));
+		oldrulename = MakeRetrieveViewRuleName(oldrelname);
 		newrulename = MakeRetrieveViewRuleName(newrelname);
-		RenameRewriteRule(oldrulename, newrulename);
+		RenameRewriteRule(relid, oldrulename, newrulename);
 	}
 
 	/*
@@ -2834,12 +2834,12 @@ renamerel(Oid relid, const char *newrelname)
 	{
 		/* update tgargs where relname is primary key */
 		update_ri_trigger_args(relid,
-							   RelationGetRelationName(targetrelation),
+							   oldrelname,
 							   newrelname,
 							   false, true);
 		/* update tgargs where relname is foreign key */
 		update_ri_trigger_args(relid,
-							   RelationGetRelationName(targetrelation),
+							   oldrelname,
 							   newrelname,
 							   true, true);
 	}

src/backend/nodes/copyfuncs.c

@@ -15,7 +15,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.179 2002/04/17 20:57:56 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.180 2002/04/18 20:01:09 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -2380,14 +2380,15 @@ _copyCreateTrigStmt(CreateTrigStmt *from)
 	return newnode;
 }
 
-static DropTrigStmt *
+static DropPropertyStmt *
-_copyDropTrigStmt(DropTrigStmt *from)
+_copyDropPropertyStmt(DropPropertyStmt *from)
 {
-	DropTrigStmt *newnode = makeNode(DropTrigStmt);
+	DropPropertyStmt *newnode = makeNode(DropPropertyStmt);
 
-	if (from->trigname)
-		newnode->trigname = pstrdup(from->trigname);
 	Node_Copy(from, newnode, relation);
+	if (from->property)
+		newnode->property = pstrdup(from->property);
+	newnode->removeType = from->removeType;
 
 	return newnode;
 }
@@ -2915,8 +2916,8 @@ copyObject(void *from)
 		case T_CreateTrigStmt:
 			retval = _copyCreateTrigStmt(from);
 			break;
-		case T_DropTrigStmt:
+		case T_DropPropertyStmt:
-			retval = _copyDropTrigStmt(from);
+			retval = _copyDropPropertyStmt(from);
 			break;
 		case T_CreatePLangStmt:
 			retval = _copyCreatePLangStmt(from);

src/backend/nodes/equalfuncs.c

@@ -20,7 +20,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/nodes/equalfuncs.c,v 1.127 2002/04/17 20:57:56 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/nodes/equalfuncs.c,v 1.128 2002/04/18 20:01:09 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1232,12 +1232,14 @@ _equalCreateTrigStmt(CreateTrigStmt *a, CreateTrigStmt *b)
 }
 
 static bool
-_equalDropTrigStmt(DropTrigStmt *a, DropTrigStmt *b)
+_equalDropPropertyStmt(DropPropertyStmt *a, DropPropertyStmt *b)
 {
-	if (!equalstr(a->trigname, b->trigname))
-		return false;
 	if (!equal(a->relation, b->relation))
 		return false;
+	if (!equalstr(a->property, b->property))
+		return false;
+	if (a->removeType != b->removeType)
+		return false;
 
 	return true;
 }
@@ -2080,8 +2082,8 @@ equal(void *a, void *b)
 		case T_CreateTrigStmt:
 			retval = _equalCreateTrigStmt(a, b);
 			break;
-		case T_DropTrigStmt:
+		case T_DropPropertyStmt:
-			retval = _equalDropTrigStmt(a, b);
+			retval = _equalDropPropertyStmt(a, b);
 			break;
 		case T_CreatePLangStmt:
 			retval = _equalCreatePLangStmt(a, b);

src/backend/parser/gram.y

@@ -11,7 +11,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.303 2002/04/17 20:57:56 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.304 2002/04/18 20:01:09 tgl Exp $
  *
  * HISTORY
  *	  AUTHOR			DATE			MAJOR EVENT
@@ -134,7 +134,7 @@ static bool set_name_needs_quotes(const char *name);
 		CreateSchemaStmt, CreateSeqStmt, CreateStmt, CreateTrigStmt,
 		CreateUserStmt, CreatedbStmt, CursorStmt, DefineStmt, DeleteStmt,
 		DropGroupStmt, DropPLangStmt, DropSchemaStmt, DropStmt, DropTrigStmt,
-		DropUserStmt, DropdbStmt, ExplainStmt, FetchStmt,
+		DropRuleStmt, DropUserStmt, DropdbStmt, ExplainStmt, FetchStmt,
 		GrantStmt, IndexStmt, InsertStmt, ListenStmt, LoadStmt, LockStmt,
 		NotifyStmt, OptimizableStmt, ProcedureStmt, ReindexStmt,
 		RemoveAggrStmt, RemoveFuncStmt, RemoveOperStmt,
@@ -469,6 +469,7 @@ stmt : AlterDatabaseSetStmt
 		| DropGroupStmt
 		| DropPLangStmt
 		| DropTrigStmt
+		| DropRuleStmt
 		| DropUserStmt
 		| ExplainStmt
 		| FetchStmt
@@ -2062,9 +2063,10 @@ ConstraintTimeSpec: INITIALLY IMMEDIATE
 
 DropTrigStmt:  DROP TRIGGER name ON qualified_name
 				{
-					DropTrigStmt *n = makeNode(DropTrigStmt);
+					DropPropertyStmt *n = makeNode(DropPropertyStmt);
-					n->trigname = $3;
 					n->relation = $5;
+					n->property = $3;
+					n->removeType = DROP_TRIGGER;
 					$$ = (Node *) n;
 				}
 		;
@@ -2154,7 +2156,6 @@ drop_type: TABLE								{ $$ = DROP_TABLE; }
 		| SEQUENCE								{ $$ = DROP_SEQUENCE; }
 		| VIEW									{ $$ = DROP_VIEW; }
 		| INDEX									{ $$ = DROP_INDEX; }
-		| RULE									{ $$ = DROP_RULE; }
 		| TYPE_P								{ $$ = DROP_TYPE; }
 		| DOMAIN_P								{ $$ = DROP_DOMAIN; }
 		;
@@ -2191,11 +2192,11 @@ TruncateStmt:  TRUNCATE opt_table qualified_name
  *  The COMMENT ON statement can take different forms based upon the type of
  *  the object associated with the comment. The form of the statement is:
  *
- *  COMMENT ON [ [ DATABASE | DOMAIN | INDEX | RULE | SEQUENCE | TABLE | TYPE | VIEW ] 
+ *  COMMENT ON [ [ DATABASE | DOMAIN | INDEX | SEQUENCE | TABLE | TYPE | VIEW ]
  *               <objname> | AGGREGATE <aggname> (<aggtype>) | FUNCTION 
  *		 <funcname> (arg1, arg2, ...) | OPERATOR <op> 
  *		 (leftoperand_typ rightoperand_typ) | TRIGGER <triggername> ON
- *		 <relname> ] IS 'text'
+ *		 <relname> | RULE <rulename> ON <relname> ] IS 'text'
  *
  *****************************************************************************/
  
@@ -2244,12 +2245,30 @@ CommentStmt:	COMMENT ON comment_type any_name IS comment_text
 				n->comment = $8;
 				$$ = (Node *) n;
 			}
+		| COMMENT ON RULE name ON any_name IS comment_text
+			{
+				CommentStmt *n = makeNode(CommentStmt);
+				n->objtype = RULE;
+				n->objname = lappend($6, makeString($4));
+				n->objargs = NIL;
+				n->comment = $8;
+				$$ = (Node *) n;
+			}
+		| COMMENT ON RULE name IS comment_text
+			{
+				/* Obsolete syntax supported for awhile for compatibility */
+				CommentStmt *n = makeNode(CommentStmt);
+				n->objtype = RULE;
+				n->objname = makeList1(makeString($4));
+				n->objargs = NIL;
+				n->comment = $6;
+				$$ = (Node *) n;
+			}
 		;
 
 comment_type:	COLUMN { $$ = COLUMN; }
 		| DATABASE { $$ = DATABASE; }
 		| INDEX { $$ = INDEX; }
-		| RULE { $$ = RULE; }
 		| SEQUENCE { $$ = SEQUENCE; }
 		| TABLE { $$ = TABLE; }
 		| DOMAIN_P { $$ = TYPE_P; }
@@ -2977,6 +2996,17 @@ opt_instead:  INSTEAD					{ $$ = TRUE; }
 		;
 
 
+DropRuleStmt:  DROP RULE name ON qualified_name
+				{
+					DropPropertyStmt *n = makeNode(DropPropertyStmt);
+					n->relation = $5;
+					n->property = $3;
+					n->removeType = DROP_RULE;
+					$$ = (Node *) n;
+				}
+		;
+
+
 /*****************************************************************************
  *
  *		QUERY:

src/backend/rewrite/rewriteDefine.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteDefine.c,v 1.66 2002/03/26 19:16:02 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteDefine.c,v 1.67 2002/04/18 20:01:09 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -37,7 +37,7 @@ static bool setRuleCheckAsUser_walker(Node *node, Oid *context);
 
 /*
  * InsertRule -
- *	  takes the arguments and inserts them as attributes into the system
+ *	  takes the arguments and inserts them as a row into the system
  *	  relation "pg_rewrite"
  */
 static Oid
@@ -58,7 +58,7 @@ InsertRule(char *rulname,
 	HeapTuple	tup;
 	Oid			rewriteObjectId;
 
-	if (IsDefinedRewriteRule(rulname))
+	if (IsDefinedRewriteRule(eventrel_oid, rulname))
 		elog(ERROR, "Attempt to insert rule \"%s\" failed: already exists",
 			 rulname);
 
@@ -69,13 +69,13 @@ InsertRule(char *rulname,
 
 	i = 0;
 	namestrcpy(&rname, rulname);
-	values[i++] = NameGetDatum(&rname);
+	values[i++] = NameGetDatum(&rname);				/* rulename */
-	values[i++] = CharGetDatum(evtype + '0');
+	values[i++] = ObjectIdGetDatum(eventrel_oid);	/* ev_class */
-	values[i++] = ObjectIdGetDatum(eventrel_oid);
+	values[i++] = Int16GetDatum(evslot_index);		/* ev_attr */
-	values[i++] = Int16GetDatum(evslot_index);
+	values[i++] = CharGetDatum(evtype + '0');		/* ev_type */
-	values[i++] = BoolGetDatum(evinstead);
+	values[i++] = BoolGetDatum(evinstead);			/* is_instead */
-	values[i++] = DirectFunctionCall1(textin, CStringGetDatum(evqual));
+	values[i++] = DirectFunctionCall1(textin, CStringGetDatum(evqual));	/* ev_qual */
-	values[i++] = DirectFunctionCall1(textin, CStringGetDatum(actiontree));
+	values[i++] = DirectFunctionCall1(textin, CStringGetDatum(actiontree));	/* ev_action */
 
 	/*
 	 * create a new pg_rewrite tuple
@@ -423,26 +423,27 @@ setRuleCheckAsUser_walker(Node *node, Oid *context)
  * ON SELECT rule associated with a view, when the view is renamed.
  */
 void
-RenameRewriteRule(char *oldname, char *newname)
+RenameRewriteRule(Oid owningRel, const char *oldName,
+				  const char *newName)
 {
 	Relation	pg_rewrite_desc;
 	HeapTuple	ruletup;
 
 	pg_rewrite_desc = heap_openr(RewriteRelationName, RowExclusiveLock);
 
-	ruletup = SearchSysCacheCopy(RULENAME,
+	ruletup = SearchSysCacheCopy(RULERELNAME,
-								 PointerGetDatum(oldname),
+								 ObjectIdGetDatum(owningRel),
-								 0, 0, 0);
+								 PointerGetDatum(oldName),
+								 0, 0);
 	if (!HeapTupleIsValid(ruletup))
-		elog(ERROR, "RenameRewriteRule: rule \"%s\" does not exist", oldname);
+		elog(ERROR, "RenameRewriteRule: rule \"%s\" does not exist", oldName);
 
 	/* should not already exist */
-	if (IsDefinedRewriteRule(newname))
+	if (IsDefinedRewriteRule(owningRel, newName))
 		elog(ERROR, "Attempt to rename rule \"%s\" failed: \"%s\" already exists",
-			 oldname, newname);
+			 oldName, newName);
 
-	StrNCpy(NameStr(((Form_pg_rewrite) GETSTRUCT(ruletup))->rulename),
+	namestrcpy(&(((Form_pg_rewrite) GETSTRUCT(ruletup))->rulename), newName);
-			newname, NAMEDATALEN);
 
 	simple_heap_update(pg_rewrite_desc, &ruletup->t_self, ruletup);
 

src/backend/rewrite/rewriteRemove.c

@@ -8,15 +8,16 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteRemove.c,v 1.47 2002/03/29 19:06:13 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteRemove.c,v 1.48 2002/04/18 20:01:09 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
 #include "postgres.h"
 
-#include "utils/builtins.h"
+#include "access/genam.h"
 #include "access/heapam.h"
 #include "catalog/catname.h"
+#include "catalog/indexing.h"
 #include "catalog/pg_rewrite.h"
 #include "commands/comment.h"
 #include "miscadmin.h"
@@ -30,12 +31,11 @@
 /*
  * RemoveRewriteRule
  *
- * Delete a rule given its (possibly qualified) rulename.
+ * Delete a rule given its name.
  */
 void
-RemoveRewriteRule(List *names)
+RemoveRewriteRule(Oid owningRel, const char *ruleName)
 {
-	char	   *ruleName;
 	Relation	RewriteRelation;
 	Relation	event_relation;
 	HeapTuple	tuple;
@@ -44,13 +44,6 @@ RemoveRewriteRule(List *names)
 	bool		hasMoreRules;
 	int32		aclcheck_result;
 
-	/*
-	 * XXX temporary until rules become schema-tized
-	 */
-	if (length(names) != 1)
-		elog(ERROR, "Qualified rule names not supported yet");
-	ruleName = strVal(lfirst(names));
-
 	/*
 	 * Open the pg_rewrite relation.
 	 */
@@ -59,9 +52,10 @@ RemoveRewriteRule(List *names)
 	/*
 	 * Find the tuple for the target rule.
 	 */
-	tuple = SearchSysCacheCopy(RULENAME,
+	tuple = SearchSysCacheCopy(RULERELNAME,
+							   ObjectIdGetDatum(owningRel),
 							   PointerGetDatum(ruleName),
-							   0, 0, 0);
+							   0, 0);
 
 	/*
 	 * complain if no rule with such name existed
@@ -75,6 +69,7 @@ RemoveRewriteRule(List *names)
 	 */
 	ruleId = tuple->t_data->t_oid;
 	eventRelationOid = ((Form_pg_rewrite) GETSTRUCT(tuple))->ev_class;
+	Assert(eventRelationOid == owningRel);
 
 	/*
 	 * We had better grab AccessExclusiveLock so that we know no other
@@ -137,10 +132,10 @@ RemoveRewriteRule(List *names)
 void
 RelationRemoveRules(Oid relid)
 {
-	Relation	RewriteRelation = NULL;
+	Relation	RewriteRelation;
-	HeapScanDesc scanDesc = NULL;
+	SysScanDesc scanDesc;
 	ScanKeyData scanKeyData;
-	HeapTuple	tuple = NULL;
+	HeapTuple	tuple;
 
 	/*
 	 * Open the pg_rewrite relation.
@@ -148,18 +143,21 @@ RelationRemoveRules(Oid relid)
 	RewriteRelation = heap_openr(RewriteRelationName, RowExclusiveLock);
 
 	/*
-	 * Scan the RuleRelation ('pg_rewrite') for all the tuples that has
+	 * Scan pg_rewrite for all the tuples that have the same ev_class
-	 * the same ev_class as relid (the relation to be removed).
+	 * as relid (the relation to be removed).
 	 */
 	ScanKeyEntryInitialize(&scanKeyData,
 						   0,
 						   Anum_pg_rewrite_ev_class,
 						   F_OIDEQ,
 						   ObjectIdGetDatum(relid));
-	scanDesc = heap_beginscan(RewriteRelation,
-							  0, SnapshotNow, 1, &scanKeyData);
 
-	while (HeapTupleIsValid(tuple = heap_getnext(scanDesc, 0)))
+	scanDesc = systable_beginscan(RewriteRelation,
+								  RewriteRelRulenameIndex,
+								  true, SnapshotNow,
+								  1, &scanKeyData);
+
+	while (HeapTupleIsValid(tuple = systable_getnext(scanDesc)))
 	{
 		/* Delete any comments associated with this rule */
 		DeleteComments(tuple->t_data->t_oid, RelationGetRelid(RewriteRelation));
@@ -167,6 +165,7 @@ RelationRemoveRules(Oid relid)
 		simple_heap_delete(RewriteRelation, &tuple->t_self);
 	}
 
-	heap_endscan(scanDesc);
+	systable_endscan(scanDesc);
+
 	heap_close(RewriteRelation, RowExclusiveLock);
 }

src/backend/rewrite/rewriteSupport.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteSupport.c,v 1.49 2001/08/12 21:35:19 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteSupport.c,v 1.50 2002/04/18 20:01:09 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -29,11 +29,12 @@
  * Is there a rule by the given name?
  */
 bool
-IsDefinedRewriteRule(const char *ruleName)
+IsDefinedRewriteRule(Oid owningRel, const char *ruleName)
 {
-	return SearchSysCacheExists(RULENAME,
+	return SearchSysCacheExists(RULERELNAME,
+								ObjectIdGetDatum(owningRel),
 								PointerGetDatum(ruleName),
-								0, 0, 0);
+								0, 0);
 }
 
 /*

src/backend/tcop/postgres.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.260 2002/03/24 04:31:07 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.261 2002/04/18 20:01:09 tgl Exp $
  *
  * NOTES
  *	  this is the "main" module of the postgres backend and
@@ -1688,7 +1688,7 @@ PostgresMain(int argc, char *argv[], const char *username)
 	if (!IsUnderPostmaster)
 	{
 		puts("\nPOSTGRES backend interactive interface ");
-		puts("$Revision: 1.260 $ $Date: 2002/03/24 04:31:07 $\n");
+		puts("$Revision: 1.261 $ $Date: 2002/04/18 20:01:09 $\n");
 	}
 
 	/*
@@ -2322,7 +2322,7 @@ CreateCommandTag(Node *parsetree)
 			tag = "CREATE";
 			break;
 
-		case T_DropTrigStmt:
+		case T_DropPropertyStmt:
 			tag = "DROP";
 			break;
 

src/backend/tcop/utility.c

@@ -10,7 +10,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/tcop/utility.c,v 1.149 2002/04/15 05:22:04 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/tcop/utility.c,v 1.150 2002/04/18 20:01:09 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -312,11 +312,6 @@ ProcessUtility(Node *parsetree,
 							RemoveIndex(rel);
 							break;
 
-						case DROP_RULE:
-							/* RemoveRewriteRule checks permissions */
-							RemoveRewriteRule(names);
-							break;
-
 						case DROP_TYPE:
 							/* RemoveType does its own permissions checks */
 							RemoveType(names);
@@ -714,12 +709,24 @@ ProcessUtility(Node *parsetree,
 			CreateTrigger((CreateTrigStmt *) parsetree);
 			break;
 
-		case T_DropTrigStmt:
+		case T_DropPropertyStmt:
 			{
-				DropTrigStmt *stmt = (DropTrigStmt *) parsetree;
+				DropPropertyStmt *stmt = (DropPropertyStmt *) parsetree;
+				Oid		relId;
 
-				DropTrigger(RangeVarGetRelid(stmt->relation, false),
+				relId = RangeVarGetRelid(stmt->relation, false);
-							stmt->trigname);
+
+				switch (stmt->removeType)
+				{
+					case DROP_RULE:
+						/* RemoveRewriteRule checks permissions */
+						RemoveRewriteRule(relId, stmt->property);
+						break;
+					case DROP_TRIGGER:
+						/* DropTrigger checks permissions */
+						DropTrigger(relId, stmt->property);
+						break;
+				}
 			}
 			break;
 

src/backend/utils/adt/ruleutils.c

@@ -3,7 +3,7 @@
  *				back to source text
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.96 2002/04/11 20:00:04 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.97 2002/04/18 20:01:09 tgl Exp $
  *
  *	  This software is copyrighted by Jan Wieck - Hamburg.
  *
@@ -42,6 +42,7 @@
 
 #include "catalog/heap.h"
 #include "catalog/index.h"
+#include "catalog/namespace.h"
 #include "catalog/pg_index.h"
 #include "catalog/pg_opclass.h"
 #include "catalog/pg_operator.h"
@@ -97,11 +98,10 @@ typedef struct
  * Global data
  * ----------
  */
-static char *rulename = NULL;
+static void *plan_getrulebyoid = NULL;
-static void *plan_getrule = NULL;
+static char *query_getrulebyoid = "SELECT * FROM pg_rewrite WHERE oid = $1";
-static char *query_getrule = "SELECT * FROM pg_rewrite WHERE rulename = $1";
+static void *plan_getviewrule = NULL;
-static void *plan_getview = NULL;
+static char *query_getviewrule = "SELECT * FROM pg_rewrite WHERE ev_class = $1 AND rulename = $2";
-static char *query_getview = "SELECT * FROM pg_rewrite WHERE rulename = $1";
 
 
 /* ----------
@@ -112,6 +112,7 @@ static char *query_getview = "SELECT * FROM pg_rewrite WHERE rulename = $1";
  * as a parameter, and append their text output to its contents.
  * ----------
  */
+static text *pg_do_getviewdef(Oid viewoid);
 static void make_ruledef(StringInfo buf, HeapTuple ruletup, TupleDesc rulettc);
 static void make_viewdef(StringInfo buf, HeapTuple ruletup, TupleDesc rulettc);
 static void get_query_def(Query *query, StringInfo buf, List *parentnamespace);
@@ -156,21 +157,16 @@ static char *get_relid_attribute_name(Oid relid, AttrNumber attnum);
 Datum
 pg_get_ruledef(PG_FUNCTION_ARGS)
 {
-	Name		rname = PG_GETARG_NAME(0);
+	Oid			ruleoid = PG_GETARG_OID(0);
 	text	   *ruledef;
 	Datum		args[1];
-	char		nulls[2];
+	char		nulls[1];
 	int			spirc;
 	HeapTuple	ruletup;
 	TupleDesc	rulettc;
 	StringInfoData buf;
 	int			len;
 
-	/*
-	 * We need the rules name somewhere deep down: rulename is global
-	 */
-	rulename = pstrdup(NameStr(*rname));
-
 	/*
 	 * Connect to SPI manager
 	 */
@@ -182,27 +178,26 @@ pg_get_ruledef(PG_FUNCTION_ARGS)
 	 * pg_rewrite over the SPI manager instead of using the syscache to be
 	 * checked for read access on pg_rewrite.
 	 */
-	if (plan_getrule == NULL)
+	if (plan_getrulebyoid == NULL)
 	{
 		Oid			argtypes[1];
 		void	   *plan;
 
-		argtypes[0] = NAMEOID;
+		argtypes[0] = OIDOID;
-		plan = SPI_prepare(query_getrule, 1, argtypes);
+		plan = SPI_prepare(query_getrulebyoid, 1, argtypes);
 		if (plan == NULL)
-			elog(ERROR, "SPI_prepare() failed for \"%s\"", query_getrule);
+			elog(ERROR, "SPI_prepare() failed for \"%s\"", query_getrulebyoid);
-		plan_getrule = SPI_saveplan(plan);
+		plan_getrulebyoid = SPI_saveplan(plan);
 	}
 
 	/*
 	 * Get the pg_rewrite tuple for this rule
 	 */
-	args[0] = PointerGetDatum(rulename);
+	args[0] = ObjectIdGetDatum(ruleoid);
-	nulls[0] = (rulename == NULL) ? 'n' : ' ';
+	nulls[0] = ' ';
-	nulls[1] = '\0';
+	spirc = SPI_execp(plan_getrulebyoid, args, nulls, 1);
-	spirc = SPI_execp(plan_getrule, args, nulls, 1);
 	if (spirc != SPI_OK_SELECT)
-		elog(ERROR, "failed to get pg_rewrite tuple for %s", rulename);
+		elog(ERROR, "failed to get pg_rewrite tuple for %u", ruleoid);
 	if (SPI_processed != 1)
 	{
 		if (SPI_finish() != SPI_OK_FINISH)
@@ -248,22 +243,48 @@ pg_get_ruledef(PG_FUNCTION_ARGS)
 Datum
 pg_get_viewdef(PG_FUNCTION_ARGS)
 {
-	Name		vname = PG_GETARG_NAME(0);
+	/* By OID */
+	Oid			viewoid = PG_GETARG_OID(0);
 	text	   *ruledef;
-	Datum		args[1];
+
-	char		nulls[1];
+	ruledef = pg_do_getviewdef(viewoid);
+	PG_RETURN_TEXT_P(ruledef);
+}
+
+Datum
+pg_get_viewdef_name(PG_FUNCTION_ARGS)
+{
+	/* By qualified name */
+	text	   *viewname = PG_GETARG_TEXT_P(0);
+	RangeVar   *viewrel;
+	Oid			viewoid;
+	text	   *ruledef;
+
+	viewrel = makeRangeVarFromNameList(textToQualifiedNameList(viewname,
+															   "get_viewdef"));
+	viewoid = RangeVarGetRelid(viewrel, false);
+
+	ruledef = pg_do_getviewdef(viewoid);
+	PG_RETURN_TEXT_P(ruledef);
+}
+
+/*
+ * Common code for by-OID and by-name variants of pg_get_viewdef
+ */
+static text *
+pg_do_getviewdef(Oid viewoid)
+{
+	text	   *ruledef;
+	Datum		args[2];
+	char		nulls[2];
 	int			spirc;
 	HeapTuple	ruletup;
 	TupleDesc	rulettc;
 	StringInfoData buf;
 	int			len;
+	char	   *viewname;
 	char	   *name;
 
-	/*
-	 * We need the view name somewhere deep down
-	 */
-	rulename = pstrdup(NameStr(*vname));
-
 	/*
 	 * Connect to SPI manager
 	 */
@@ -275,28 +296,31 @@ pg_get_viewdef(PG_FUNCTION_ARGS)
 	 * pg_rewrite over the SPI manager instead of using the syscache to be
 	 * checked for read access on pg_rewrite.
 	 */
-	if (plan_getview == NULL)
+	if (plan_getviewrule == NULL)
 	{
-		Oid			argtypes[1];
+		Oid			argtypes[2];
 		void	   *plan;
 
-		argtypes[0] = NAMEOID;
+		argtypes[0] = OIDOID;
-		plan = SPI_prepare(query_getview, 1, argtypes);
+		argtypes[1] = NAMEOID;
+		plan = SPI_prepare(query_getviewrule, 2, argtypes);
 		if (plan == NULL)
-			elog(ERROR, "SPI_prepare() failed for \"%s\"", query_getview);
+			elog(ERROR, "SPI_prepare() failed for \"%s\"", query_getviewrule);
-		plan_getview = SPI_saveplan(plan);
+		plan_getviewrule = SPI_saveplan(plan);
 	}
 
 	/*
-	 * Get the pg_rewrite tuple for this rule: rulename is actually
+	 * Get the pg_rewrite tuple for the view's SELECT rule
-	 * viewname here
 	 */
-	name = MakeRetrieveViewRuleName(rulename);
+	viewname = get_rel_name(viewoid);
-	args[0] = PointerGetDatum(name);
+	name = MakeRetrieveViewRuleName(viewname);
+	args[0] = ObjectIdGetDatum(viewoid);
+	args[1] = PointerGetDatum(name);
 	nulls[0] = ' ';
-	spirc = SPI_execp(plan_getview, args, nulls, 1);
+	nulls[1] = ' ';
+	spirc = SPI_execp(plan_getviewrule, args, nulls, 2);
 	if (spirc != SPI_OK_SELECT)
-		elog(ERROR, "failed to get pg_rewrite tuple for view %s", rulename);
+		elog(ERROR, "failed to get pg_rewrite tuple for view %s", viewname);
 	initStringInfo(&buf);
 	if (SPI_processed != 1)
 		appendStringInfo(&buf, "Not a view");
@@ -322,10 +346,7 @@ pg_get_viewdef(PG_FUNCTION_ARGS)
 	if (SPI_finish() != SPI_OK_FINISH)
 		elog(ERROR, "get_viewdef: SPI_finish() failed");
 
-	/*
+	return ruledef;
-	 * Easy - isn't it?
-	 */
-	PG_RETURN_TEXT_P(ruledef);
 }
 
 
@@ -633,8 +654,6 @@ deparse_expression(Node *expr, List *dpcontext, bool forceprefix)
 	context.namespaces = dpcontext;
 	context.varprefix = forceprefix;
 
-	rulename = "";				/* in case of errors */
-
 	get_rule_expr(expr, &context);
 
 	return buf.data;
@@ -792,6 +811,7 @@ deparse_context_for_subplan(const char *name, List *tlist,
 static void
 make_ruledef(StringInfo buf, HeapTuple ruletup, TupleDesc rulettc)
 {
+	char	   *rulename;
 	char		ev_type;
 	Oid			ev_class;
 	int2		ev_attr;
@@ -800,23 +820,38 @@ make_ruledef(StringInfo buf, HeapTuple ruletup, TupleDesc rulettc)
 	char	   *ev_action;
 	List	   *actions = NIL;
 	int			fno;
+	Datum		dat;
 	bool		isnull;
 
 	/*
 	 * Get the attribute values from the rules tuple
 	 */
+	fno = SPI_fnumber(rulettc, "rulename");
+	dat = SPI_getbinval(ruletup, rulettc, fno, &isnull);
+	Assert(!isnull);
+	rulename = NameStr(*(DatumGetName(dat)));
+
 	fno = SPI_fnumber(rulettc, "ev_type");
-	ev_type = (char) SPI_getbinval(ruletup, rulettc, fno, &isnull);
+	dat = SPI_getbinval(ruletup, rulettc, fno, &isnull);
+	Assert(!isnull);
+	ev_type = DatumGetChar(dat);
 
 	fno = SPI_fnumber(rulettc, "ev_class");
-	ev_class = (Oid) SPI_getbinval(ruletup, rulettc, fno, &isnull);
+	dat = SPI_getbinval(ruletup, rulettc, fno, &isnull);
+	Assert(!isnull);
+	ev_class = DatumGetObjectId(dat);
 
 	fno = SPI_fnumber(rulettc, "ev_attr");
-	ev_attr = (int2) SPI_getbinval(ruletup, rulettc, fno, &isnull);
+	dat = SPI_getbinval(ruletup, rulettc, fno, &isnull);
+	Assert(!isnull);
+	ev_attr = DatumGetInt16(dat);
 
 	fno = SPI_fnumber(rulettc, "is_instead");
-	is_instead = (bool) SPI_getbinval(ruletup, rulettc, fno, &isnull);
+	dat = SPI_getbinval(ruletup, rulettc, fno, &isnull);
+	Assert(!isnull);
+	is_instead = DatumGetBool(dat);
 
+	/* these could be nulls */
 	fno = SPI_fnumber(rulettc, "ev_qual");
 	ev_qual = SPI_getvalue(ruletup, rulettc, fno);
 
@@ -1051,8 +1086,8 @@ get_query_def(Query *query, StringInfo buf, List *parentnamespace)
 			break;
 
 		default:
-			elog(ERROR, "get_ruledef of %s: query command type %d not implemented yet",
+			elog(ERROR, "get_query_def: unknown query command type %d",
-				 rulename, query->commandType);
+				 query->commandType);
 			break;
 	}
 }
@@ -1901,9 +1936,7 @@ get_rule_expr(Node *node, deparse_context *context)
 			break;
 
 		default:
-			printf("\n%s\n", nodeToString(node));
+			elog(ERROR, "get_rule_expr: unknown node type %d", nodeTag(node));
-			elog(ERROR, "get_ruledef of %s: unknown node type %d in get_rule_expr()",
-				 rulename, nodeTag(node));
 			break;
 	}
 }

src/backend/utils/cache/relcache.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/cache/relcache.c,v 1.160 2002/04/12 20:38:29 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/cache/relcache.c,v 1.161 2002/04/18 20:01:09 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -675,17 +675,18 @@ RelationBuildRuleLock(Relation relation)
 
 	/*
 	 * open pg_rewrite and begin a scan
-	 *
-	 * XXX: there is no suitable index for this scan.  FIXME.
 	 */
 	pg_rewrite_desc = heap_openr(RewriteRelationName, AccessShareLock);
 	pg_rewrite_tupdesc = RelationGetDescr(pg_rewrite_desc);
-	pg_rewrite_scan = systable_beginscan(pg_rewrite_desc, NULL, false,
+	pg_rewrite_scan = systable_beginscan(pg_rewrite_desc, 
+										 RewriteRelRulenameIndex,
+										 criticalRelcachesBuilt,
 										 SnapshotNow,
 										 1, &key);
 
 	while (HeapTupleIsValid(pg_rewrite_tuple = systable_getnext(pg_rewrite_scan)))
 	{
+		Form_pg_rewrite rewrite_form = (Form_pg_rewrite) GETSTRUCT(pg_rewrite_tuple);
 		bool		isnull;
 		Datum		ruleaction;
 		Datum		rule_evqual;
@@ -698,18 +699,11 @@ RelationBuildRuleLock(Relation relation)
 
 		rule->ruleId = pg_rewrite_tuple->t_data->t_oid;
 
-		rule->event = DatumGetInt32(heap_getattr(pg_rewrite_tuple,
+		rule->event = rewrite_form->ev_type - '0';
-												 Anum_pg_rewrite_ev_type,
+		rule->attrno = rewrite_form->ev_attr;
-												 pg_rewrite_tupdesc,
+		rule->isInstead = rewrite_form->is_instead;
-												 &isnull)) - 48;
+
-		rule->attrno = DatumGetInt16(heap_getattr(pg_rewrite_tuple,
+		/* Must use heap_getattr to fetch ev_qual and ev_action */
-												  Anum_pg_rewrite_ev_attr,
-												  pg_rewrite_tupdesc,
-												  &isnull));
-		rule->isInstead = DatumGetBool(heap_getattr(pg_rewrite_tuple,
-											  Anum_pg_rewrite_is_instead,
-													pg_rewrite_tupdesc,
-													&isnull));
 
 		ruleaction = heap_getattr(pg_rewrite_tuple,
 								  Anum_pg_rewrite_ev_action,

src/backend/utils/cache/syscache.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/cache/syscache.c,v 1.78 2002/04/17 20:57:56 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/cache/syscache.c,v 1.79 2002/04/18 20:01:10 tgl Exp $
  *
  * NOTES
  *	  These routines allow the parser/planner/executor to perform
@@ -333,14 +333,14 @@ static const struct cachedesc cacheinfo[] = {
 			0,
 			0
 	}},
-	{RewriteRelationName,		/* RULENAME */
+	{RewriteRelationName,		/* RULERELNAME */
-		RewriteRulenameIndex,
+		RewriteRelRulenameIndex,
 		Anum_pg_rewrite_ev_class,
-		1,
+		2,
 		{
+			Anum_pg_rewrite_ev_class,
 			Anum_pg_rewrite_rulename,
 			0,
-			0,
 			0
 	}},
 	{ShadowRelationName,		/* SHADOWNAME */

src/bin/initdb/initdb.sh

@@ -27,7 +27,7 @@
 # Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
 # Portions Copyright (c) 1994, Regents of the University of California
 #
-# $Header: /cvsroot/pgsql/src/bin/initdb/Attic/initdb.sh,v 1.148 2002/04/15 22:33:21 tgl Exp $
+# $Header: /cvsroot/pgsql/src/bin/initdb/Attic/initdb.sh,v 1.149 2002/04/18 20:01:10 tgl Exp $
 #
 #-------------------------------------------------------------------------
 
@@ -689,19 +689,21 @@ CREATE VIEW pg_user AS \
 
 CREATE VIEW pg_rules AS \
     SELECT \
+        N.nspname AS schemaname, \
         C.relname AS tablename, \
         R.rulename AS rulename, \
-        pg_get_ruledef(R.rulename) AS definition \
+        pg_get_ruledef(R.oid) AS definition \
-    FROM pg_rewrite R, pg_class C \
+    FROM (pg_rewrite R JOIN pg_class C ON (C.oid = R.ev_class)) \
-    WHERE R.rulename !~ '^_RET' \
+        LEFT JOIN pg_namespace N ON (N.oid = C.relnamespace) \
-        AND C.oid = R.ev_class;
+    WHERE R.rulename !~ '^_RET';
 
 CREATE VIEW pg_views AS \
     SELECT \
+        N.nspname AS schemaname, \
         C.relname AS viewname, \
         pg_get_userbyid(C.relowner) AS viewowner, \
-        pg_get_viewdef(C.relname) AS definition \
+        pg_get_viewdef(C.oid) AS definition \
-    FROM pg_class C \
+    FROM pg_class C LEFT JOIN pg_namespace N ON (N.oid = C.relnamespace) \
     WHERE C.relkind = 'v';
 
 -- XXX why does pg_tables include sequences?

src/bin/pg_dump/pg_dump.c

@@ -22,7 +22,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/bin/pg_dump/pg_dump.c,v 1.248 2002/04/13 19:57:18 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/bin/pg_dump/pg_dump.c,v 1.249 2002/04/18 20:01:10 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -2274,17 +2274,28 @@ getTables(int *numTables, FuncInfo *finfo, int numFuncs, const char *tablename)
 			PGresult   *res2;
 
 			resetPQExpBuffer(query);
-			appendPQExpBuffer(query, "SELECT definition as viewdef, ");
 
-			/*
+			if (g_fout->remoteVersion < 70300)
-			 * XXX 7.2 - replace with att from pg_views or some other
+			{
-			 * generic source
+				appendPQExpBuffer(query, "SELECT definition as viewdef, "
-			 */
+								  "(select oid from pg_rewrite where "
-			appendPQExpBuffer(query, "(select oid from pg_rewrite where "
+								  " rulename=('_RET' || viewname)::name) as view_oid"
-					  " rulename=('_RET' || viewname)::name) as view_oid"
+								  " from pg_views where viewname = ");
-							  " from pg_views where viewname = ");
+				formatStringLiteral(query, tblinfo[i].relname, CONV_ALL);
-			formatStringLiteral(query, tblinfo[i].relname, CONV_ALL);
+				appendPQExpBuffer(query, ";");
-			appendPQExpBuffer(query, ";");
+			}
+			else
+			{
+				/* Beginning in 7.3, viewname is not unique; use OID */
+				appendPQExpBuffer(query, "SELECT pg_get_viewdef(ev_class) as viewdef, "
+								  "oid as view_oid"
+								  " from pg_rewrite where"
+								  " ev_class = '%s'::oid and"
+								  " rulename = ('_RET' || ",
+								  tblinfo[i].oid);
+				formatStringLiteral(query, tblinfo[i].relname, CONV_ALL);
+				appendPQExpBuffer(query, ")::name;");
+			}
 
 			res2 = PQexec(g_conn, query->data);
 			if (!res2 || PQresultStatus(res2) != PGRES_TUPLES_OK)
@@ -4995,23 +5006,41 @@ dumpRules(Archive *fout, const char *tablename,
 			continue;
 
 		/*
-		 * Get all rules defined for this table We include pg_rules in the
+		 * Get all rules defined for this table
-		 * cross since it filters out all view rules (pjw 15-Sep-2000).
-		 *
-		 * XXXX: Use LOJ here
 		 */
 		resetPQExpBuffer(query);
-		appendPQExpBuffer(query, "SELECT definition,"
+
-						  "   (select usename from pg_user where pg_class.relowner = usesysid) AS viewowner, "
+		if (g_fout->remoteVersion < 70300)
-						  "   pg_rewrite.oid, pg_rewrite.rulename "
+		{
-						  "FROM pg_rewrite, pg_class, pg_rules "
+			/*
-						  "WHERE pg_class.relname = ");
+			 * We include pg_rules in the cross since it filters out all view
-		formatStringLiteral(query, tblinfo[t].relname, CONV_ALL);
+			 * rules (pjw 15-Sep-2000).
-		appendPQExpBuffer(query,
+			 */
-						  "    AND pg_rewrite.ev_class = pg_class.oid "
+			appendPQExpBuffer(query, "SELECT definition,"
-						  "    AND pg_rules.tablename = pg_class.relname "
+							  "   (select usename from pg_user where pg_class.relowner = usesysid) AS viewowner, "
-					   "    AND pg_rules.rulename = pg_rewrite.rulename "
+							  "   pg_rewrite.oid, pg_rewrite.rulename "
-						  "ORDER BY pg_rewrite.oid");
+							  "FROM pg_rewrite, pg_class, pg_rules "
+							  "WHERE pg_class.relname = ");
+			formatStringLiteral(query, tblinfo[t].relname, CONV_ALL);
+			appendPQExpBuffer(query,
+							  "    AND pg_rewrite.ev_class = pg_class.oid "
+							  "    AND pg_rules.tablename = pg_class.relname "
+							  "    AND pg_rules.rulename = pg_rewrite.rulename "
+							  "ORDER BY pg_rewrite.oid");
+		}
+		else
+		{
+			appendPQExpBuffer(query, "SELECT pg_get_ruledef(pg_rewrite.oid) AS definition,"
+							  " (select usename from pg_user where pg_class.relowner = usesysid) AS viewowner, "
+							  " pg_rewrite.oid, pg_rewrite.rulename "
+							  "FROM pg_rewrite, pg_class "
+							  "WHERE pg_class.oid = '%s'::oid "
+							  " AND pg_rewrite.ev_class = pg_class.oid "
+							  " AND pg_rewrite.rulename !~ '^_RET' "
+							  "ORDER BY pg_rewrite.oid",
+							  tblinfo[t].oid);
+		}
+
 		res = PQexec(g_conn, query->data);
 		if (!res ||
 			PQresultStatus(res) != PGRES_TUPLES_OK)
@@ -5041,6 +5070,7 @@ dumpRules(Archive *fout, const char *tablename,
 
 			resetPQExpBuffer(query);
 			appendPQExpBuffer(query, "RULE %s", fmtId(PQgetvalue(res, i, i_rulename), force_quotes));
+			appendPQExpBuffer(query, " ON %s", fmtId(tblinfo[t].relname, force_quotes));
 			dumpComment(fout, query->data, PQgetvalue(res, i, i_oid),
 						"pg_rewrite", 0, NULL);
 

src/include/catalog/catversion.h

@@ -37,7 +37,7 @@
  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: catversion.h,v 1.117 2002/04/17 20:57:56 tgl Exp $
+ * $Id: catversion.h,v 1.118 2002/04/18 20:01:10 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -53,6 +53,6 @@
  */
 
 /*							yyyymmddN */
-#define CATALOG_VERSION_NO	200204171
+#define CATALOG_VERSION_NO	200204181
 
 #endif

src/include/catalog/indexing.h

@@ -8,7 +8,7 @@
  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: indexing.h,v 1.64 2002/04/17 20:57:56 tgl Exp $
+ * $Id: indexing.h,v 1.65 2002/04/18 20:01:10 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -80,7 +80,7 @@
 #define ProcedureOidIndex			"pg_proc_oid_index"
 #define RelCheckIndex				"pg_relcheck_rcrelid_index"
 #define RewriteOidIndex				"pg_rewrite_oid_index"
-#define RewriteRulenameIndex		"pg_rewrite_rulename_index"
+#define RewriteRelRulenameIndex		"pg_rewrite_rel_rulename_index"
 #define ShadowNameIndex				"pg_shadow_usename_index"
 #define ShadowSysidIndex			"pg_shadow_usesysid_index"
 #define StatisticRelidAttnumIndex	"pg_statistic_relid_att_index"
@@ -178,7 +178,7 @@ DECLARE_UNIQUE_INDEX(pg_proc_proname_args_nsp_index on pg_proc using btree(prona
 /* This following index is not used for a cache and is not unique */
 DECLARE_INDEX(pg_relcheck_rcrelid_index on pg_relcheck using btree(rcrelid oid_ops));
 DECLARE_UNIQUE_INDEX(pg_rewrite_oid_index on pg_rewrite using btree(oid oid_ops));
-DECLARE_UNIQUE_INDEX(pg_rewrite_rulename_index on pg_rewrite using btree(rulename name_ops));
+DECLARE_UNIQUE_INDEX(pg_rewrite_rel_rulename_index on pg_rewrite using btree(ev_class oid_ops, rulename name_ops));
 DECLARE_UNIQUE_INDEX(pg_shadow_usename_index on pg_shadow using btree(usename name_ops));
 DECLARE_UNIQUE_INDEX(pg_shadow_usesysid_index on pg_shadow using btree(usesysid int4_ops));
 DECLARE_UNIQUE_INDEX(pg_statistic_relid_att_index on pg_statistic using btree(starelid oid_ops, staattnum int2_ops));

src/include/catalog/pg_proc.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: pg_proc.h,v 1.227 2002/04/11 20:00:12 tgl Exp $
+ * $Id: pg_proc.h,v 1.228 2002/04/18 20:01:10 tgl Exp $
  *
  * NOTES
  *	  The script catalog/genbki.sh reads this file and generates .bki
@@ -2150,9 +2150,11 @@ DATA(insert OID = 1639 (  oidge				   PGNSP PGUID 12 f t f t f i 2 16 "26 26" 10
 DESCR("greater-than-or-equal");
 
 /* System-view support functions */
-DATA(insert OID = 1640 (  pg_get_ruledef	   PGNSP PGUID 12 f t f t f s 1 25 "19" 100 0 0 100  pg_get_ruledef - _null_ ));
+DATA(insert OID = 1573 (  pg_get_ruledef	   PGNSP PGUID 12 f t f t f s 1 25 "26" 100 0 0 100  pg_get_ruledef - _null_ ));
 DESCR("source text of a rule");
-DATA(insert OID = 1641 (  pg_get_viewdef	   PGNSP PGUID 12 f t f t f s 1 25 "19" 100 0 0 100  pg_get_viewdef - _null_ ));
+DATA(insert OID = 1640 (  pg_get_viewdef	   PGNSP PGUID 12 f t f t f s 1 25 "25" 100 0 0 100  pg_get_viewdef_name - _null_ ));
+DESCR("select statement of a view");
+DATA(insert OID = 1641 (  pg_get_viewdef	   PGNSP PGUID 12 f t f t f s 1 25 "26" 100 0 0 100  pg_get_viewdef - _null_ ));
 DESCR("select statement of a view");
 DATA(insert OID = 1642 (  pg_get_userbyid	   PGNSP PGUID 12 f t f t f s 1 19 "23" 100 0 0 100  pg_get_userbyid - _null_ ));
 DESCR("user name by UID (with fallback)");

src/include/catalog/pg_rewrite.h

@@ -4,11 +4,14 @@
  *	  definition of the system "rewrite-rule" relation (pg_rewrite)
  *	  along with the relation's initial contents.
  *
+ * As of Postgres 7.3, the primary key for this table is <ev_class, rulename>
+ * --- ie, rule names are only unique among the rules of a given table.
+ *
  *
  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: pg_rewrite.h,v 1.17 2001/11/05 17:46:32 momjian Exp $
+ * $Id: pg_rewrite.h,v 1.18 2002/04/18 20:01:11 tgl Exp $
  *
  * NOTES
  *	  the genbki.sh script reads this file and generates .bki
@@ -34,9 +37,9 @@
 CATALOG(pg_rewrite)
 {
 	NameData	rulename;
-	char		ev_type;
 	Oid			ev_class;
 	int2		ev_attr;
+	char		ev_type;
 	bool		is_instead;
 
 	/* NB: remaining fields must be accessed via heap_getattr */
@@ -57,9 +60,9 @@ typedef FormData_pg_rewrite *Form_pg_rewrite;
  */
 #define Natts_pg_rewrite				7
 #define Anum_pg_rewrite_rulename		1
-#define Anum_pg_rewrite_ev_type			2
+#define Anum_pg_rewrite_ev_class		2
-#define Anum_pg_rewrite_ev_class		3
+#define Anum_pg_rewrite_ev_attr			3
-#define Anum_pg_rewrite_ev_attr			4
+#define Anum_pg_rewrite_ev_type			4
 #define Anum_pg_rewrite_is_instead		5
 #define Anum_pg_rewrite_ev_qual			6
 #define Anum_pg_rewrite_ev_action		7

src/include/nodes/nodes.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: nodes.h,v 1.104 2002/04/05 11:56:54 momjian Exp $
+ * $Id: nodes.h,v 1.105 2002/04/18 20:01:11 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -181,7 +181,7 @@ typedef enum NodeTag
 	T_VariableShowStmt,
 	T_VariableResetStmt,
 	T_CreateTrigStmt,
-	T_DropTrigStmt,
+	T_DropPropertyStmt,
 	T_CreatePLangStmt,
 	T_DropPLangStmt,
 	T_CreateUserStmt,

src/include/nodes/parsenodes.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: parsenodes.h,v 1.171 2002/04/17 20:57:57 tgl Exp $
+ * $Id: parsenodes.h,v 1.172 2002/04/18 20:01:11 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -940,13 +940,6 @@ typedef struct CreateTrigStmt
 	RangeVar   *constrrel;		/* opposite relation */
 } CreateTrigStmt;
 
-typedef struct DropTrigStmt
-{
-	NodeTag		type;
-	char	   *trigname;		/* TRIGGER' name */
-	RangeVar   *relation;		/* triggered relation */
-} DropTrigStmt;
-
 /* ----------------------
  *		Create/Drop PROCEDURAL LANGUAGE Statement
  * ----------------------
@@ -1060,7 +1053,7 @@ typedef struct CreateDomainStmt
 } CreateDomainStmt;
 
 /* ----------------------
- *		Drop Table|Sequence|View|Index|Rule|Type Statement
+ *		Drop Table|Sequence|View|Index|Type|Domain Statement
  * ----------------------
  */
 
@@ -1068,9 +1061,8 @@ typedef struct CreateDomainStmt
 #define DROP_SEQUENCE 2
 #define DROP_VIEW	  3
 #define DROP_INDEX	  4
-#define DROP_RULE	  5
+#define DROP_TYPE     5
-#define DROP_TYPE     6
+#define DROP_DOMAIN	  6
-#define DROP_DOMAIN	  7
 
 typedef struct DropStmt
 {
@@ -1080,6 +1072,25 @@ typedef struct DropStmt
 	int	   		behavior;		/* CASCADE or RESTRICT drop behavior */
 } DropStmt;
 
+/* ----------------------
+ *		Drop Rule|Trigger Statement
+ *
+ * In general this may be used for dropping any property of a relation;
+ * for example, someday soon we may have DROP ATTRIBUTE.
+ * ----------------------
+ */
+
+#define DROP_RULE	  100
+#define DROP_TRIGGER  101
+
+typedef struct DropPropertyStmt
+{
+	NodeTag		type;
+	RangeVar   *relation;		/* owning relation */
+	char	   *property;		/* name of rule, trigger, etc */
+	int			removeType;
+} DropPropertyStmt;
+
 /* ----------------------
  *				Truncate Table Statement
  * ----------------------

src/include/rewrite/rewriteDefine.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: rewriteDefine.h,v 1.13 2001/11/05 17:46:35 momjian Exp $
+ * $Id: rewriteDefine.h,v 1.14 2002/04/18 20:01:11 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -18,6 +18,7 @@
 
 extern void DefineQueryRewrite(RuleStmt *args);
 
-extern void RenameRewriteRule(char *oldname, char *newname);
+extern void RenameRewriteRule(Oid owningRel, const char *oldName,
+							  const char *newName);
 
 #endif   /* REWRITEDEFINE_H */

src/include/rewrite/rewriteRemove.h

@@ -7,14 +7,14 @@
  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: rewriteRemove.h,v 1.12 2002/03/29 19:06:26 tgl Exp $
+ * $Id: rewriteRemove.h,v 1.13 2002/04/18 20:01:11 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
 #ifndef REWRITEREMOVE_H
 #define REWRITEREMOVE_H
 
-extern void RemoveRewriteRule(List *names);
+extern void RemoveRewriteRule(Oid owningRel, const char *ruleName);
 extern void RelationRemoveRules(Oid relid);
 
 #endif   /* REWRITEREMOVE_H */

src/include/rewrite/rewriteSupport.h

@@ -7,14 +7,14 @@
  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: rewriteSupport.h,v 1.20 2001/11/05 17:46:35 momjian Exp $
+ * $Id: rewriteSupport.h,v 1.21 2002/04/18 20:01:11 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
 #ifndef REWRITESUPPORT_H
 #define REWRITESUPPORT_H
 
-extern bool IsDefinedRewriteRule(const char *ruleName);
+extern bool IsDefinedRewriteRule(Oid owningRel, const char *ruleName);
 
 extern char *MakeRetrieveViewRuleName(const char *view_name);
 

src/include/utils/builtins.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: builtins.h,v 1.176 2002/04/11 20:00:17 tgl Exp $
+ * $Id: builtins.h,v 1.177 2002/04/18 20:01:11 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -337,6 +337,7 @@ extern Datum regproctooid(PG_FUNCTION_ARGS);
 /* ruleutils.c */
 extern Datum pg_get_ruledef(PG_FUNCTION_ARGS);
 extern Datum pg_get_viewdef(PG_FUNCTION_ARGS);
+extern Datum pg_get_viewdef_name(PG_FUNCTION_ARGS);
 extern Datum pg_get_indexdef(PG_FUNCTION_ARGS);
 extern Datum pg_get_userbyid(PG_FUNCTION_ARGS);
 extern Datum pg_get_expr(PG_FUNCTION_ARGS);

src/include/utils/syscache.h

@@ -9,7 +9,7 @@
  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: syscache.h,v 1.46 2002/04/17 20:57:57 tgl Exp $
+ * $Id: syscache.h,v 1.47 2002/04/18 20:01:11 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -52,7 +52,7 @@
 #define PROCOID			21
 #define RELNAMENSP		22
 #define RELOID			23
-#define RULENAME		24
+#define RULERELNAME		24
 #define SHADOWNAME		25
 #define SHADOWSYSID		26
 #define STATRELATT		27

src/test/regress/expected/errors.out

@@ -217,13 +217,13 @@ ERROR:  parser: parse error at or near ";"
 drop rule 314159;
 ERROR:  parser: parse error at or near "314159"
 -- no such rule 
-drop rule nonesuch;
+drop rule nonesuch on noplace;
-ERROR:  Rule "nonesuch" not found
+ERROR:  Relation "noplace" does not exist
 -- bad keyword 
 drop tuple rule nonesuch;
 ERROR:  parser: parse error at or near "tuple"
 -- no such rule 
-drop instance rule nonesuch;
+drop instance rule nonesuch on noplace;
 ERROR:  parser: parse error at or near "instance"
 -- no such rule 
 drop rewrite rule nonesuch;

src/test/regress/expected/rules.out

@@ -648,8 +648,8 @@ select * from rtest_order2;
 ---+---+-------------------------------------
  1 | 1 | rule 2 - this should run 1st
  1 | 2 | rule 4 - this should run 2nd
- 1 | 3 | rule 3 - this should run 3rd or 4th
+ 1 | 3 | rule 1 - this should run 3rd or 4th
- 1 | 4 | rule 1 - this should run 3rd or 4th
+ 1 | 4 | rule 3 - this should run 3rd or 4th
 (4 rows)
 
 --
@@ -1173,7 +1173,7 @@ select * from foo;
  1001
 (1 row)
 
-drop rule foorule;
+drop rule foorule on foo;
 -- this should fail because f1 is not exposed for unqualified reference:
 create rule foorule as on insert to foo where f1 < 100
 do instead insert into foo2 values (f1);
@@ -1196,7 +1196,7 @@ select * from foo2;
   2
 (1 row)
 
-drop rule foorule;
+drop rule foorule on foo;
 drop table foo;
 drop table foo2;
 --
@@ -1256,7 +1256,7 @@ select * from cchild;
    2 | test2
 (2 rows)
 
-drop rule rrule;
+drop rule rrule on vview;
 drop view vview;
 drop table pparent;
 drop table cchild;
@@ -1268,7 +1268,7 @@ SELECT viewname, definition FROM pg_views ORDER BY viewname;
 --------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  iexit                    | SELECT ih.name, ih.thepath, interpt_pp(ih.thepath, r.thepath) AS exit FROM ihighway ih, ramp r WHERE (ih.thepath ## r.thepath);
  pg_indexes               | SELECT c.relname AS tablename, i.relname AS indexname, pg_get_indexdef(x.indexrelid) AS indexdef FROM pg_index x, pg_class c, pg_class i WHERE ((((c.relkind = 'r'::"char") AND (i.relkind = 'i'::"char")) AND (c.oid = x.indrelid)) AND (i.oid = x.indexrelid));
- pg_rules                 | SELECT c.relname AS tablename, r.rulename, pg_get_ruledef(r.rulename) AS definition FROM pg_rewrite r, pg_class c WHERE ((r.rulename !~ '^_RET'::text) AND (c.oid = r.ev_class));
+ pg_rules                 | SELECT n.nspname AS schemaname, c.relname AS tablename, r.rulename, pg_get_ruledef(r.oid) AS definition FROM ((pg_rewrite r JOIN pg_class c ON ((c.oid = r.ev_class))) LEFT JOIN pg_namespace n ON ((n.oid = c.relnamespace))) WHERE (r.rulename !~ '^_RET'::text);
  pg_stat_activity         | SELECT d.oid AS datid, d.datname, pg_stat_get_backend_pid(s.backendid) AS procpid, pg_stat_get_backend_userid(s.backendid) AS usesysid, u.usename, pg_stat_get_backend_activity(s.backendid) AS current_query FROM pg_database d, (SELECT pg_stat_get_backend_idset() AS backendid) s, pg_shadow u WHERE ((pg_stat_get_backend_dbid(s.backendid) = d.oid) AND (pg_stat_get_backend_userid(s.backendid) = u.usesysid));
  pg_stat_all_indexes      | SELECT c.oid AS relid, i.oid AS indexrelid, c.relname, i.relname AS indexrelname, pg_stat_get_numscans(i.oid) AS idx_scan, pg_stat_get_tuples_returned(i.oid) AS idx_tup_read, pg_stat_get_tuples_fetched(i.oid) AS idx_tup_fetch FROM pg_class c, pg_class i, pg_index x WHERE (((c.relkind = 'r'::"char") AND (x.indrelid = c.oid)) AND (x.indexrelid = i.oid));
  pg_stat_all_tables       | SELECT c.oid AS relid, c.relname, pg_stat_get_numscans(c.oid) AS seq_scan, pg_stat_get_tuples_returned(c.oid) AS seq_tup_read, sum(pg_stat_get_numscans(i.indexrelid)) AS idx_scan, sum(pg_stat_get_tuples_fetched(i.indexrelid)) AS idx_tup_fetch, pg_stat_get_tuples_inserted(c.oid) AS n_tup_ins, pg_stat_get_tuples_updated(c.oid) AS n_tup_upd, pg_stat_get_tuples_deleted(c.oid) AS n_tup_del FROM (pg_class c LEFT JOIN pg_index i ON ((c.oid = i.indrelid))) WHERE (c.relkind = 'r'::"char") GROUP BY c.oid, c.relname;
@@ -1289,7 +1289,7 @@ SELECT viewname, definition FROM pg_views ORDER BY viewname;
  pg_stats                 | SELECT c.relname AS tablename, a.attname, s.stanullfrac AS null_frac, s.stawidth AS avg_width, s.stadistinct AS n_distinct, CASE WHEN (1 = s.stakind1) THEN s.stavalues1 WHEN (1 = s.stakind2) THEN s.stavalues2 WHEN (1 = s.stakind3) THEN s.stavalues3 WHEN (1 = s.stakind4) THEN s.stavalues4 ELSE NULL::"_text" END AS most_common_vals, CASE WHEN (1 = s.stakind1) THEN s.stanumbers1 WHEN (1 = s.stakind2) THEN s.stanumbers2 WHEN (1 = s.stakind3) THEN s.stanumbers3 WHEN (1 = s.stakind4) THEN s.stanumbers4 ELSE NULL::"_float4" END AS most_common_freqs, CASE WHEN (2 = s.stakind1) THEN s.stavalues1 WHEN (2 = s.stakind2) THEN s.stavalues2 WHEN (2 = s.stakind3) THEN s.stavalues3 WHEN (2 = s.stakind4) THEN s.stavalues4 ELSE NULL::"_text" END AS histogram_bounds, CASE WHEN (3 = s.stakind1) THEN s.stanumbers1[1] WHEN (3 = s.stakind2) THEN s.stanumbers2[1] WHEN (3 = s.stakind3) THEN s.stanumbers3[1] WHEN (3 = s.stakind4) THEN s.stanumbers4[1] ELSE NULL::float4 END AS correlation FROM pg_class c, pg_attribute a, pg_statistic s WHERE ((((c.oid = s.starelid) AND (c.oid = a.attrelid)) AND (a.attnum = s.staattnum)) AND has_table_privilege(c.oid, 'select'::text));
  pg_tables                | SELECT c.relname AS tablename, pg_get_userbyid(c.relowner) AS tableowner, c.relhasindex AS hasindexes, c.relhasrules AS hasrules, (c.reltriggers > 0) AS hastriggers FROM pg_class c WHERE ((c.relkind = 'r'::"char") OR (c.relkind = 's'::"char"));
  pg_user                  | SELECT pg_shadow.usename, pg_shadow.usesysid, pg_shadow.usecreatedb, pg_shadow.usetrace, pg_shadow.usesuper, pg_shadow.usecatupd, '********'::text AS passwd, pg_shadow.valuntil, pg_shadow.useconfig FROM pg_shadow;
- pg_views                 | SELECT c.relname AS viewname, pg_get_userbyid(c.relowner) AS viewowner, pg_get_viewdef(c.relname) AS definition FROM pg_class c WHERE (c.relkind = 'v'::"char");
+ pg_views                 | SELECT n.nspname AS schemaname, c.relname AS viewname, pg_get_userbyid(c.relowner) AS viewowner, pg_get_viewdef(c.oid) AS definition FROM (pg_class c LEFT JOIN pg_namespace n ON ((n.oid = c.relnamespace))) WHERE (c.relkind = 'v'::"char");
  rtest_v1                 | SELECT rtest_t1.a, rtest_t1.b FROM rtest_t1;
  rtest_vcomp              | SELECT x.part, (x.size * y.factor) AS size_in_cm FROM rtest_comp x, rtest_unitfact y WHERE (x.unit = y.unit);
  rtest_vview1             | SELECT x.a, x.b FROM rtest_view1 x WHERE (0 < (SELECT count(*) AS count FROM rtest_view2 y WHERE (y.a = x.a)));

src/test/regress/sql/errors.sql

@@ -239,13 +239,13 @@ drop rule;
 drop rule 314159;
 
 -- no such rule 
-drop rule nonesuch;
+drop rule nonesuch on noplace;
 
 -- bad keyword 
 drop tuple rule nonesuch;
 
 -- no such rule 
-drop instance rule nonesuch;
+drop instance rule nonesuch on noplace;
 
 -- no such rule 
 drop rewrite rule nonesuch;

src/test/regress/sql/rules.sql

@@ -699,7 +699,7 @@ insert into foo values(1);
 insert into foo values(1001);
 select * from foo;
 
-drop rule foorule;
+drop rule foorule on foo;
 
 -- this should fail because f1 is not exposed for unqualified reference:
 create rule foorule as on insert to foo where f1 < 100
@@ -714,7 +714,7 @@ insert into foo values(100);
 select * from foo;
 select * from foo2;
 
-drop rule foorule;
+drop rule foorule on foo;
 drop table foo;
 drop table foo2;
 
@@ -751,7 +751,7 @@ update vview set descrip='test3' where pid=3;
 select * from vview;
 select * from cchild;
 
-drop rule rrule;
+drop rule rrule on vview;
 drop view vview;
 drop table pparent;
 drop table cchild;