Replaced targetlist entry in GroupClause by reference number

in Resdom and GroupClause so changing of resno's doesn't confuse
the grouping any more.

Jan

src/backend/nodes/copyfuncs.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.78 1999/04/27 09:49:36 ishii Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.79 1999/05/12 15:01:31 wieck Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -487,8 +487,8 @@ _copyGroupClause(GroupClause *from)
 {
 	GroupClause *newnode = makeNode(GroupClause);
 
-	Node_Copy(from, newnode, entry);
 	newnode->grpOpoid = from->grpOpoid;
+	newnode->tleGroupref = from->tleGroupref;
 
 	return newnode;
 }
@@ -589,6 +589,7 @@ _copyResdom(Resdom *from)
 		newnode->resname = pstrdup(from->resname);
 	newnode->reskey = from->reskey;
 	newnode->reskeyop = from->reskeyop;
+	newnode->resgroupref = from->resgroupref;
 	newnode->resjunk = from->resjunk;
 
 	return newnode;

src/backend/nodes/equalfuncs.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/nodes/equalfuncs.c,v 1.35 1999/02/18 00:49:14 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/nodes/equalfuncs.c,v 1.36 1999/05/12 15:01:33 wieck Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -48,6 +48,8 @@ _equalResdom(Resdom *a, Resdom *b)
 		return false;
 	if (a->reskey != b->reskey)
 		return false;
+	if (a->resgroupref != b->resgroupref)
+		return false;
 	if (a->reskeyop != b->reskeyop)
 		return false;
 

src/backend/nodes/freefuncs.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/nodes/Attic/freefuncs.c,v 1.15 1999/03/01 00:10:31 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/nodes/Attic/freefuncs.c,v 1.16 1999/05/12 15:01:33 wieck Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -396,8 +396,6 @@ _freeAgg(Agg *node)
 static void
 _freeGroupClause(GroupClause *node)
 {
-	freeObject(node->entry);
-
 	pfree(node);
 }
 

src/backend/nodes/makefuncs.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/nodes/makefuncs.c,v 1.13 1999/02/13 23:15:58 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/nodes/makefuncs.c,v 1.14 1999/05/12 15:01:34 wieck Exp $
  *
  * NOTES
  *	  Creator functions in POSTGRES 4.2 are generated automatically. Most of
@@ -107,6 +107,7 @@ makeResdom(AttrNumber resno,
 	resdom->resname = resname;
 	resdom->reskey = reskey;
 	resdom->reskeyop = reskeyop;
+	resdom->resgroupref = 0;
 	resdom->resjunk = resjunk;
 	return resdom;
 }

src/backend/nodes/outfuncs.c

@@ -5,7 +5,7 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- *  $Id: outfuncs.c,v 1.80 1999/05/10 00:45:10 momjian Exp $
+ *  $Id: outfuncs.c,v 1.81 1999/05/12 15:01:34 wieck Exp $
  *
  * NOTES
  *	  Every (plan) node in POSTGRES has an associated "out" routine which
@@ -255,10 +255,9 @@ _outSortClause(StringInfo str, SortClause *node)
 static void
 _outGroupClause(StringInfo str, GroupClause *node)
 {
-	appendStringInfo(str, " GROUPCLAUSE :entry ");
+	appendStringInfo(str, " GROUPCLAUSE :grpOpoid %u :tleGroupref %d", 
-	_outNode(str, node->entry);
+			node->grpOpoid,
-
+			node->tleGroupref);
-	appendStringInfo(str, " :grpOpoid %u ", node->grpOpoid);
 }
 
 /*
@@ -556,15 +555,18 @@ _outHash(StringInfo str, Hash *node)
 static void
 _outResdom(StringInfo str, Resdom *node)
 {
-	appendStringInfo(str, " RESDOM :resno %d :restype %u :restypmod %d ",
+	appendStringInfo(str, " RESDOM :resno %d :restype %u :restypmod %d",
 			node->resno,
 			node->restype,
 			node->restypmod);
 
-	appendStringInfo(str, " :resname \"%s\" :reskey %d :reskeyop %u :resjunk %d",
+	appendStringInfo(str, " :resname \"%s\" :reskey %d :reskeyop %u",
 			stringStringInfo(node->resname),
 			node->reskey,
-			node->reskeyop,
+			node->reskeyop);
+
+	appendStringInfo(str, " :resgroupref %d :resjunk %d",
+			node->resgroupref,
 			node->resjunk);
 }
 

src/backend/nodes/readfuncs.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/nodes/readfuncs.c,v 1.60 1999/03/01 00:10:31 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/nodes/readfuncs.c,v 1.61 1999/05/12 15:01:35 wieck Exp $
  *
  * NOTES
  *	  Most of the read functions for plan nodes are tested. (In fact, they
@@ -221,13 +221,14 @@ _readGroupClause()
 
 	local_node = makeNode(GroupClause);
 
-	token = lsptok(NULL, &length);		/* skip the :entry */
-	local_node->entry = nodeRead(true);
-
 	token = lsptok(NULL, &length);		/* skip :grpOpoid */
 	token = lsptok(NULL, &length);		/* get grpOpoid */
 	local_node->grpOpoid = strtoul(token, NULL, 10);
 
+	token = lsptok(NULL, &length);		/* skip :tleGroupref */
+	token = lsptok(NULL, &length);		/* get tleGroupref */
+	local_node->tleGroupref = strtoul(token, NULL, 10);
+
 	return local_node;
 }
 
@@ -744,6 +745,10 @@ _readResdom()
 	token = lsptok(NULL, &length);		/* get reskeyop */
 	local_node->reskeyop = (Oid) atol(token);
 
+	token = lsptok(NULL, &length);		/* eat :resgroupref */
+	token = lsptok(NULL, &length);		/* get resgroupref */
+	local_node->resgroupref = strtoul(token, NULL, 10);
+
 	token = lsptok(NULL, &length);		/* eat :resjunk */
 	token = lsptok(NULL, &length);		/* get resjunk */
 	local_node->resjunk = atoi(token);

src/backend/optimizer/plan/planner.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/optimizer/plan/planner.c,v 1.50 1999/05/10 00:45:20 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/optimizer/plan/planner.c,v 1.51 1999/05/12 15:01:37 wieck Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -260,7 +260,8 @@ union_planner(Query *parse)
 			 * belong to?)
 			 */
 			check_having_for_ungrouped_vars(parse->havingQual,
-											parse->groupClause);
+											parse->groupClause,
+											parse->targetList);
 		}
 
 		/* Calculate the opfids from the opnos */
@@ -426,8 +427,7 @@ make_subplanTargetList(Query *parse,
 			GroupClause *grpcl = (GroupClause *) lfirst(gl);
 
 			keyno++;			/* sort key # for this GroupClause */
-			/* Is it safe to use just resno to match tlist and glist items?? */
+			if (grpcl->tleGroupref == resdom->resgroupref)
-			if (grpcl->entry->resdom->resno == resdom->resno)
 			{
 				/* Found a matching groupclause; record info for sorting */
 				foundGroupClause = true;

src/backend/optimizer/plan/setrefs.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/optimizer/plan/setrefs.c,v 1.45 1999/05/06 23:07:33 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/optimizer/plan/setrefs.c,v 1.46 1999/05/12 15:01:39 wieck Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -961,7 +961,8 @@ del_agg_clause(Node *clause)
  */
 
 void
-check_having_for_ungrouped_vars(Node *clause, List *groupClause)
+check_having_for_ungrouped_vars(Node *clause, List *groupClause,
+						List *targetList)
 {
 	List	   *t;
 
@@ -981,7 +982,7 @@ check_having_for_ungrouped_vars(Node *clause, List *groupClause)
 	else if (IsA(clause, Iter))
 	{
 		check_having_for_ungrouped_vars(((Iter *) clause)->iterexpr,
-										groupClause);
+										groupClause, targetList);
 	}
 	else if (is_subplan(clause))
 	{
@@ -997,7 +998,8 @@ check_having_for_ungrouped_vars(Node *clause, List *groupClause)
 			foreach(gl, groupClause)
 			{
 				if (var_equal(lfirst(t),
-							  get_expr(((GroupClause *) lfirst(gl))->entry)))
+							  get_groupclause_expr((GroupClause *) 
+							  					lfirst(gl), targetList)))
 				{
 					contained_in_group_clause = true;
 					break;
@@ -1016,7 +1018,8 @@ check_having_for_ungrouped_vars(Node *clause, List *groupClause)
 		 * subplan is a kind of Expr node.
 		 */
 		foreach(t, ((Expr *) clause)->args)
-			check_having_for_ungrouped_vars(lfirst(t), groupClause);
+			check_having_for_ungrouped_vars(lfirst(t), groupClause,
+														targetList);
 	}
 	else if (IsA(clause, List))
 	{
@@ -1024,12 +1027,13 @@ check_having_for_ungrouped_vars(Node *clause, List *groupClause)
 		 * Recursively scan AND subclauses (see NOTE above).
 		 */
 		foreach(t, ((List *) clause))
-			check_having_for_ungrouped_vars(lfirst(t), groupClause);
+			check_having_for_ungrouped_vars(lfirst(t), groupClause,
+														targetList);
 	}
 	else if (IsA(clause, Aggref))
 	{
 		check_having_for_ungrouped_vars(((Aggref *) clause)->target,
-										groupClause);
+										groupClause, targetList);
 	}
 	else if (IsA(clause, ArrayRef))
 	{
@@ -1040,22 +1044,28 @@ check_having_for_ungrouped_vars(Node *clause, List *groupClause)
 		 * expression and its index expression...
 		 */
 		foreach(t, aref->refupperindexpr)
-			check_having_for_ungrouped_vars(lfirst(t), groupClause);
+			check_having_for_ungrouped_vars(lfirst(t), groupClause,
+														targetList);
 		foreach(t, aref->reflowerindexpr)
-			check_having_for_ungrouped_vars(lfirst(t), groupClause);
+			check_having_for_ungrouped_vars(lfirst(t), groupClause,
-		check_having_for_ungrouped_vars(aref->refexpr, groupClause);
+														targetList);
-		check_having_for_ungrouped_vars(aref->refassgnexpr, groupClause);
+		check_having_for_ungrouped_vars(aref->refexpr, groupClause,
+														targetList);
+		check_having_for_ungrouped_vars(aref->refassgnexpr, groupClause,
+														targetList);
 	}
 	else if (case_clause(clause))
 	{
 		foreach(t, ((CaseExpr *) clause)->args)
 		{
 			CaseWhen   *when = (CaseWhen *) lfirst(t);
-			check_having_for_ungrouped_vars(when->expr, groupClause);
+			check_having_for_ungrouped_vars(when->expr, groupClause,
-			check_having_for_ungrouped_vars(when->result, groupClause);
+														targetList);
+			check_having_for_ungrouped_vars(when->result, groupClause,
+														targetList);
 		}
 		check_having_for_ungrouped_vars(((CaseExpr *) clause)->defresult,
-										groupClause);
+										groupClause, targetList);
 	}
 	else
 	{

src/backend/optimizer/prep/preptlist.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/optimizer/prep/preptlist.c,v 1.18 1999/02/13 23:16:38 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/optimizer/prep/preptlist.c,v 1.19 1999/05/12 15:01:41 wieck Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -229,6 +229,49 @@ replace_matching_resname(List *new_tlist, List *old_tlist)
 			new_tl = makeTargetEntry(newresno, old_tle->expr);
 			t_list = lappend(t_list, new_tl);
 		}
+
+		/*
+		 * Also it is possible that the parser or rewriter added
+		 * some junk attributes to hold GROUP BY expressions which
+		 * are not part of the result attributes.
+		 * We can simply identify them by looking at the resgroupref
+		 * in the TLE's resdom, which is a unique number telling which
+		 * TLE belongs to which GroupClause.
+		 */
+		if (old_tle->resdom->resgroupref > 0)
+		{
+			bool			already_there = FALSE;
+			TargetEntry 	*new_tle;
+			Resdom	   		*newresno;
+
+			/*
+			 * Check if the tle is already in the new list
+			 */
+			foreach(i, t_list)
+			{
+				new_tle = (TargetEntry *)lfirst(i);
+
+				if (new_tle->resdom->resgroupref == 
+									old_tle->resdom->resgroupref)
+				{
+					already_there = TRUE;
+					break;
+				}
+
+			}
+
+			/*
+			 * If not, add it and make sure it is now a junk attribute
+			 */
+			if (!already_there)
+			{
+				newresno = (Resdom *) copyObject((Node *) old_tle->resdom);
+				newresno->resno = length(t_list) + 1;
+				newresno->resjunk = 1;
+				new_tl = makeTargetEntry(newresno, old_tle->expr);
+				t_list = lappend(t_list, new_tl);
+			}
+		}
 	}
 
 	return t_list;

src/backend/optimizer/util/tlist.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/optimizer/util/tlist.c,v 1.29 1999/05/06 23:07:33 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/optimizer/util/tlist.c,v 1.30 1999/05/12 15:01:44 wieck Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -518,6 +518,25 @@ get_expr(TargetEntry *tle)
 }
 
 
+Var *
+get_groupclause_expr(GroupClause *groupClause, List *targetList)
+{
+	List		*l;
+	TargetEntry	*tle;
+
+	foreach(l, targetList)
+	{
+		tle = (TargetEntry *)lfirst(l);
+		if (tle->resdom->resgroupref == groupClause->tleGroupref)
+			return get_expr(tle);
+	}
+
+	elog(ERROR, 
+		"get_groupclause_expr: GROUP BY expression not found in targetlist");
+	return NULL;
+}
+
+
 /*****************************************************************************
  *
  *****************************************************************************/
@@ -528,6 +547,11 @@ get_expr(TargetEntry *tle)
  *	  in there.
  */
 #ifdef NOT_USED
+/*
+ * WARNING!!! If this ever get's used again, the new reference
+ * mechanism from group clause to targetlist entry must be implemented
+ * here too. Jan
+ */
 void
 AddGroupAttrToTlist(List *tlist, List *grpCl)
 {

src/backend/parser/parse_agg.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/parser/parse_agg.c,v 1.18 1999/04/29 01:13:13 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/parser/parse_agg.c,v 1.19 1999/05/12 15:01:48 wieck Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -32,8 +32,9 @@
 #include "utils/lsyscache.h"
 
 static bool contain_agg_clause(Node *clause);
-static bool exprIsAggOrGroupCol(Node *expr, List *groupClause);
+static bool exprIsAggOrGroupCol(Node *expr, List *groupClause, List *tlist);
-static bool tleIsAggOrGroupCol(TargetEntry *tle, List *groupClause);
+static bool tleIsAggOrGroupCol(TargetEntry *tle, List *groupClause, 
+													List *tlist);
 
 /*
  * contain_agg_clause
@@ -100,7 +101,7 @@ contain_agg_clause(Node *clause)
  *	  returns true if the expression does not contain non-group columns.
  */
 static bool
-exprIsAggOrGroupCol(Node *expr, List *groupClause)
+exprIsAggOrGroupCol(Node *expr, List *groupClause, List *tlist)
 {
 	List	   *gl;
 
@@ -113,7 +114,7 @@ exprIsAggOrGroupCol(Node *expr, List *groupClause)
 	{
 		GroupClause *grpcl = lfirst(gl);
 
-		if (equal(expr, grpcl->entry->expr))
+		if (equal(expr, get_groupclause_expr(grpcl, tlist)))
 			return TRUE;
 	}
 
@@ -122,7 +123,7 @@ exprIsAggOrGroupCol(Node *expr, List *groupClause)
 		List	   *temp;
 
 		foreach(temp, ((Expr *) expr)->args)
-			if (!exprIsAggOrGroupCol(lfirst(temp), groupClause))
+			if (!exprIsAggOrGroupCol(lfirst(temp), groupClause, tlist))
 			return FALSE;
 		return TRUE;
 	}
@@ -135,7 +136,7 @@ exprIsAggOrGroupCol(Node *expr, List *groupClause)
  *	  returns true if the TargetEntry is Agg or GroupCol.
  */
 static bool
-tleIsAggOrGroupCol(TargetEntry *tle, List *groupClause)
+tleIsAggOrGroupCol(TargetEntry *tle, List *groupClause, List *tlist)
 {
 	Node	   *expr = tle->expr;
 	List	   *gl;
@@ -147,7 +148,7 @@ tleIsAggOrGroupCol(TargetEntry *tle, List *groupClause)
 	{
 		GroupClause *grpcl = lfirst(gl);
 
-		if (tle->resdom->resno == grpcl->entry->resdom->resno)
+		if (tle->resdom->resgroupref == grpcl->tleGroupref)
 		{
 			if (contain_agg_clause((Node *) expr))
 				elog(ERROR, "Aggregates not allowed in GROUP BY clause");
@@ -163,7 +164,7 @@ tleIsAggOrGroupCol(TargetEntry *tle, List *groupClause)
 		List	   *temp;
 
 		foreach(temp, ((Expr *) expr)->args)
-			if (!exprIsAggOrGroupCol(lfirst(temp), groupClause))
+			if (!exprIsAggOrGroupCol(lfirst(temp), groupClause, tlist))
 			return FALSE;
 		return TRUE;
 	}
@@ -200,7 +201,7 @@ parseCheckAggregates(ParseState *pstate, Query *qry)
 	{
 		TargetEntry *tle = lfirst(tl);
 
-		if (!tleIsAggOrGroupCol(tle, qry->groupClause))
+		if (!tleIsAggOrGroupCol(tle, qry->groupClause, qry->targetList))
 			elog(ERROR,
 				 "Illegal use of aggregates or non-group column in target list");
 	}
@@ -210,7 +211,7 @@ parseCheckAggregates(ParseState *pstate, Query *qry)
 	 * restriction as those in the target list.
 	 */
 
-	if (!exprIsAggOrGroupCol(qry->havingQual, qry->groupClause))
+	if (!exprIsAggOrGroupCol(qry->havingQual, qry->groupClause, qry->targetList))
 		elog(ERROR,
 			 "Illegal use of aggregates or non-group column in HAVING clause");
 	return;

src/backend/parser/parse_clause.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/parser/parse_clause.c,v 1.29 1999/02/23 07:46:42 thomas Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/parser/parse_clause.c,v 1.30 1999/05/12 15:01:50 wieck Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -550,13 +550,19 @@ transformGroupClause(ParseState *pstate, List *grouplist, List *targetlist)
 
 		restarget = findTargetlistEntry(pstate, lfirst(grouplist), targetlist, GROUP_CLAUSE);
 
-		grpcl->entry = restarget;
 		resdom = restarget->resdom;
 		grpcl->grpOpoid = oprid(oper("<",
 									 resdom->restype,
 									 resdom->restype, false));
 		if (glist == NIL)
+		{
+			int		groupref = length(glist) + 1;
+
+			restarget->resdom->resgroupref = groupref;
+			grpcl->tleGroupref = groupref;
+
 			gl = glist = lcons(grpcl, NIL);
+		}
 		else
 		{
 			List	   *i;
@@ -565,11 +571,17 @@ transformGroupClause(ParseState *pstate, List *grouplist, List *targetlist)
 			{
 				GroupClause *gcl = (GroupClause *) lfirst(i);
 
-				if (gcl->entry == grpcl->entry)
+				if (equal(get_groupclause_expr(gcl, targetlist),
+							restarget->expr))
 					break;
 			}
 			if (i == NIL)		/* not in grouplist already */
 			{
+				int		groupref = length(glist) + 1;
+
+				restarget->resdom->resgroupref = groupref;
+				grpcl->tleGroupref = groupref;
+
 				lnext(gl) = lcons(grpcl, NIL);
 				gl = lnext(gl);
 			}

src/backend/rewrite/rewriteHandler.c

@@ -6,7 +6,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteHandler.c,v 1.38 1999/05/09 23:31:46 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteHandler.c,v 1.39 1999/05/12 15:01:53 wieck Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -170,15 +170,7 @@ rangeTableEntry_used(Node *node, int rt_index, int sublevels_up)
 			break;
 
 		case T_GroupClause:
-			{
+			return FALSE;
-				GroupClause	*grp = (GroupClause *)node;
-
-				return rangeTableEntry_used(
-						(Node *)(grp->entry),
-						rt_index,
-						sublevels_up);
-			}
-			break;
 
 		case T_Expr:
 			{
@@ -348,12 +340,6 @@ rangeTableEntry_used(Node *node, int rt_index, int sublevels_up)
 						sublevels_up))
 					return TRUE;
 
-				if (rangeTableEntry_used(
-						(Node *)(qry->groupClause),
-						rt_index,
-						sublevels_up))
-					return TRUE;
-
 				return FALSE;
 			}
 			break;
@@ -407,16 +393,7 @@ attribute_used(Node *node, int rt_index, int attno, int sublevels_up)
 			break;
 
 		case T_GroupClause:
-			{
+			return FALSE;
-				GroupClause	*grp = (GroupClause *)node;
-
-				return attribute_used(
-						(Node *)(grp->entry),
-						rt_index,
-						attno,
-						sublevels_up);
-			}
-			break;
 
 		case T_Expr:
 			{
@@ -558,13 +535,6 @@ attribute_used(Node *node, int rt_index, int attno, int sublevels_up)
 						sublevels_up))
 					return TRUE;
 
-				if (attribute_used(
-						(Node *)(qry->groupClause),
-						rt_index,
-						attno,
-						sublevels_up))
-					return TRUE;
-
 				return FALSE;
 			}
 			break;
@@ -697,8 +667,6 @@ modifyAggrefUplevel(Node *node)
 				modifyAggrefUplevel(
 						(Node *)(qry->havingQual));
 
-				modifyAggrefUplevel(
-						(Node *)(qry->groupClause));
 			}
 			break;
 
@@ -752,15 +720,6 @@ modifyAggrefChangeVarnodes(Node **nodePtr, int rt_index, int new_index, int subl
 			break;
 
 		case T_GroupClause:
-			{
-				GroupClause	*grp = (GroupClause *)node;
-
-				modifyAggrefChangeVarnodes(
-						(Node **)(&(grp->entry)),
-						rt_index,
-						new_index,
-						sublevels_up);
-			}
 			break;
 
 		case T_Expr:
@@ -894,12 +853,6 @@ modifyAggrefChangeVarnodes(Node **nodePtr, int rt_index, int new_index, int subl
 						rt_index,
 						new_index,
 						sublevels_up);
-
-				modifyAggrefChangeVarnodes(
-						(Node **)(&(qry->groupClause)),
-						rt_index,
-						new_index,
-						sublevels_up);
 			}
 			break;
 
@@ -1186,13 +1139,6 @@ modifyAggrefQual(Node **nodePtr, Query *parsetree)
 			break;
 
 		case T_GroupClause:
-			{
-				GroupClause	*grp = (GroupClause *)node;
-
-				modifyAggrefQual(
-						(Node **)(&(grp->entry)),
-						parsetree);
-			}
 			break;
 
 		case T_Expr:
@@ -1386,13 +1332,6 @@ apply_RIR_adjust_sublevel(Node *node, int sublevels_up)
 			break;
 
 		case T_GroupClause:
-			{
-				GroupClause	*grp = (GroupClause *)node;
-
-				apply_RIR_adjust_sublevel(
-						(Node *)(grp->entry),
-						sublevels_up);
-			}
 			break;
 
 		case T_Expr:
@@ -1539,17 +1478,6 @@ apply_RIR_view(Node **nodePtr, int rt_index, RangeTblEntry *rte, List *tlist, in
 			break;
 
 		case T_GroupClause:
-			{
-				GroupClause	*grp = (GroupClause *)node;
-
-				apply_RIR_view(
-						(Node **)(&(grp->entry)),
-						rt_index,
-						rte,
-						tlist,
-						modified,
-						sublevels_up);
-			}
 			break;
 
 		case T_Expr:
@@ -1724,14 +1652,6 @@ apply_RIR_view(Node **nodePtr, int rt_index, RangeTblEntry *rte, List *tlist, in
 						tlist,
 						modified,
 						sublevels_up);
-
-				apply_RIR_view(
-						(Node **)(&(qry->groupClause)),
-						rt_index,
-						rte,
-						tlist,
-						modified,
-						sublevels_up);
 			}
 			break;
 
@@ -1898,10 +1818,8 @@ ApplyRetrieveRule(Query *parsetree,
 	}
 	if (*modified && !badsql) {
 	  AddQual(parsetree, rule_action->qual);
-	  /* This will only work if the query made to the view defined by the following
+	  AddGroupClause(parsetree, rule_action->groupClause, 
-	   * groupClause groups by the same attributes or does not use group at all! */
+	  								rule_action->targetList);
-	  if (parsetree->groupClause == NULL)
-	    parsetree->groupClause=rule_action->groupClause;
 	  AddHavingQual(parsetree, rule_action->havingQual);
 	  parsetree->hasAggs = (rule_action->hasAggs || parsetree->hasAggs);
 	  parsetree->hasSubLinks = (rule_action->hasSubLinks ||  parsetree->hasSubLinks);
@@ -1935,12 +1853,6 @@ fireRIRonSubselect(Node *node)
 			break;
 
 		case T_GroupClause:
-			{
-				GroupClause	*grp = (GroupClause *)node;
-
-				fireRIRonSubselect(
-						(Node *)(grp->entry));
-			}
 			break;
 
 		case T_Expr:
@@ -2048,9 +1960,6 @@ fireRIRonSubselect(Node *node)
 
 				fireRIRonSubselect(
 						(Node *)(qry->havingQual));
-
-				fireRIRonSubselect(
-						(Node *)(qry->groupClause));
 			}
 			break;
 

src/backend/rewrite/rewriteManip.c

@@ -6,7 +6,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteManip.c,v 1.29 1999/02/13 23:17:49 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteManip.c,v 1.30 1999/05/12 15:01:55 wieck Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -65,14 +65,6 @@ OffsetVarNodes(Node *node, int offset, int sublevels_up)
 			break;
 
 		case T_GroupClause:
-			{
-				GroupClause	*grp = (GroupClause *)node;
-
-				OffsetVarNodes(
-						(Node *)(grp->entry),
-						offset,
-						sublevels_up);
-			}
 			break;
 
 		case T_Expr:
@@ -199,11 +191,6 @@ OffsetVarNodes(Node *node, int offset, int sublevels_up)
 						(Node *)(qry->havingQual),
 						offset,
 						sublevels_up);
-
-				OffsetVarNodes(
-						(Node *)(qry->groupClause),
-						offset,
-						sublevels_up);
 			}
 			break;
 
@@ -284,15 +271,6 @@ ChangeVarNodes(Node *node, int rt_index, int new_index, int sublevels_up)
 			break;
 
 		case T_GroupClause:
-			{
-				GroupClause	*grp = (GroupClause *)node;
-
-				ChangeVarNodes(
-						(Node *)(grp->entry),
-						rt_index,
-						new_index,
-						sublevels_up);
-			}
 			break;
 
 		case T_Expr:
@@ -430,12 +408,6 @@ ChangeVarNodes(Node *node, int rt_index, int new_index, int sublevels_up)
 						rt_index,
 						new_index,
 						sublevels_up);
-
-				ChangeVarNodes(
-						(Node *)(qry->groupClause),
-						rt_index,
-						new_index,
-						sublevels_up);
 			}
 			break;
 
@@ -562,6 +534,44 @@ AddNotQual(Query *parsetree, Node *qual)
 	AddQual(parsetree, copy);
 }
 
+
+void
+AddGroupClause(Query *parsetree, List *group_by, List *tlist)
+{
+	List			*l;
+	List			*tl;
+	GroupClause		*groupclause;
+	TargetEntry		*tle;
+	int				new_resno;
+
+	new_resno = length(parsetree->targetList);
+
+	foreach (l, group_by)
+	{
+		groupclause = (GroupClause *)copyObject(lfirst(l));
+		tle = NULL;
+		foreach(tl, tlist)
+		{
+			if (((TargetEntry *)lfirst(tl))->resdom->resgroupref ==
+						groupclause->tleGroupref)
+			{
+				tle = (TargetEntry *)copyObject(lfirst(tl));
+				break;
+			}
+		}
+		if (tle == NULL)
+			elog(ERROR, "AddGroupClause(): GROUP BY entry not found in rules targetlist");
+
+		tle->resdom->resno = ++new_resno;
+		tle->resdom->resjunk = true;
+		tle->resdom->resgroupref = length(parsetree->groupClause) + 1;
+		groupclause->tleGroupref = tle->resdom->resgroupref;
+
+		parsetree->targetList  = lappend(parsetree->targetList, tle);
+		parsetree->groupClause = lappend(parsetree->groupClause, groupclause);
+	}
+}
+
 static Node *
 make_null(Oid type)
 {
@@ -688,7 +698,10 @@ ResolveNew(RewriteInfo *info, List *targetlist, Node **nodePtr,
 							*nodePtr = make_null(((Var *) node)->vartype);
 					}
 					else
+					{
 						*nodePtr = copyObject(n);
+						((Var *) *nodePtr)->varlevelsup = this_varlevelsup;
+					}
 				}
 				break;
 			}
@@ -709,6 +722,8 @@ ResolveNew(RewriteInfo *info, List *targetlist, Node **nodePtr,
 				ResolveNew(info, targetlist, (Node **) &(query->qual), sublevels_up + 1);
 			}
 			break;
+		case T_GroupClause:
+			break;
 		default:
 			/* ignore the others */
 			break;
@@ -720,7 +735,10 @@ FixNew(RewriteInfo *info, Query *parsetree)
 {
 	ResolveNew(info, parsetree->targetList,
 			   (Node **) &(info->rule_action->targetList), 0);
-	ResolveNew(info, parsetree->targetList, &info->rule_action->qual, 0);
+	ResolveNew(info, parsetree->targetList, 
+	           (Node **) &info->rule_action->qual, 0);
+	ResolveNew(info, parsetree->targetList, 
+	           (Node **) &(info->rule_action->groupClause), 0);
 }
 
 static void

src/backend/utils/adt/ruleutils.c

@@ -3,7 +3,7 @@
  *			  out of it's tuple
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.11 1999/05/10 00:45:59 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.12 1999/05/12 15:01:58 wieck Exp $
  *
  *	  This software is copyrighted by Jan Wieck - Hamburg.
  *
@@ -1263,9 +1263,23 @@ get_rule_expr(QryHier *qh, int rt_index, Node *node, bool varprefix)
 		case T_GroupClause:
 			{
 				GroupClause *grp = (GroupClause *) node;
+				List		*l;
+				TargetEntry	*tle = NULL;
 
-				return get_rule_expr(qh, rt_index,
+				foreach(l, qh->query->targetList)
-									 (Node *) (grp->entry), varprefix);
+				{
+					if (((TargetEntry *)lfirst(l))->resdom->resgroupref ==
+									grp->tleGroupref)
+					{
+						tle = (TargetEntry *)lfirst(l);
+						break;
+					}
+				}
+
+				if (tle == NULL)
+					elog(ERROR, "GROUP BY expression not found in targetlist");
+
+				return get_rule_expr(qh, rt_index, (Node *)tle, varprefix);
 			}
 			break;
 
@@ -1738,12 +1752,7 @@ check_if_rte_used(int rt_index, Node *node, int sup)
 			break;
 
 		case T_GroupClause:
-			{
+			return FALSE;
-				GroupClause *grp = (GroupClause *) node;
-
-				return check_if_rte_used(rt_index,
-										 (Node *) (grp->entry), sup);
-			}
 			break;
 
 		case T_Expr:

src/include/nodes/parsenodes.h

@@ -6,7 +6,7 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: parsenodes.h,v 1.71 1999/02/23 07:55:24 thomas Exp $
+ * $Id: parsenodes.h,v 1.72 1999/05/12 15:02:04 wieck Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -960,8 +960,8 @@ typedef struct SortClause
 typedef struct GroupClause
 {
 	NodeTag		type;
-	TargetEntry *entry;			/* attributes to group on */
 	Oid			grpOpoid;		/* the sort operator to use */
+	Index		tleGroupref;	/* reference into targetlist */
 } GroupClause;
 
 #define	ROW_MARK_FOR_UPDATE		(1 << 0)

src/include/nodes/primnodes.h

@@ -6,7 +6,7 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: primnodes.h,v 1.25 1999/02/13 23:21:40 momjian Exp $
+ * $Id: primnodes.h,v 1.26 1999/05/12 15:02:07 wieck Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -30,6 +30,7 @@
  *		resname			- name of the resdom (could be NULL)
  *		reskey			- order of key in a sort (for those > 0)
  *		reskeyop		- sort operator Oid
+ *		resgroupref		- set to nonzero if referenced from a group by clause
  *		resjunk			- set to nonzero to eliminate the attribute
  *						  from final target list  e.g., ctid for replace
  *						  and delete
@@ -45,6 +46,7 @@ typedef struct Resdom
 	char	   *resname;
 	Index		reskey;
 	Oid			reskeyop;
+	Index		resgroupref;
 	int			resjunk;
 } Resdom;
 

src/include/nodes/relation.h

@@ -6,7 +6,7 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: relation.h,v 1.29 1999/02/22 19:55:44 momjian Exp $
+ * $Id: relation.h,v 1.30 1999/05/12 15:02:08 wieck Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -103,6 +103,7 @@ typedef struct RelOptInfo
 } RelOptInfo;
 
 extern Var *get_expr(TargetEntry *foo);
+extern Var *get_groupclause_expr(GroupClause *groupClause, List *targetList);
 
 typedef struct MergeOrder
 {

src/include/optimizer/planmain.h

@@ -6,7 +6,7 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: planmain.h,v 1.24 1999/05/03 00:38:42 tgl Exp $
+ * $Id: planmain.h,v 1.25 1999/05/12 15:02:22 wieck Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -62,7 +62,9 @@ extern void replace_vars_with_subplan_refs(Node *clause,
 										   List *subplanTargetList);
 extern bool set_agg_tlist_references(Agg *aggNode);
 extern void del_agg_tlist_references(List *tlist);
-extern void check_having_for_ungrouped_vars(Node *clause, List *groupClause);
+extern void check_having_for_ungrouped_vars(Node *clause,
+											List *groupClause,
+											List *targetList);
 extern void transformKeySetQuery(Query *origNode);
 
 #endif	 /* PLANMAIN_H */

src/include/rewrite/rewriteManip.h

@@ -6,7 +6,7 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: rewriteManip.h,v 1.13 1999/02/13 23:22:00 momjian Exp $
+ * $Id: rewriteManip.h,v 1.14 1999/05/12 15:02:28 wieck Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -26,6 +26,7 @@ void		AddHavingQual(Query *parsetree, Node *havingQual);
 
 void		AddNotQual(Query *parsetree, Node *qual);
 void            AddNotHavingQual(Query *parsetree, Node *havingQual);
+void		AddGroupClause(Query *parsetree, List *group_by, List *tlist);
 
 void		FixNew(RewriteInfo *info, Query *parsetree);
 

src/test/regress/expected/opr_sanity.out

@@ -1,7 +1,8 @@
 QUERY: SELECT p1.oid, p1.proname
 FROM pg_proc as p1
-WHERE p1.prolang = 0 OR p1.prorettype = 0 OR
+WHERE (p1.prolang = 0 OR p1.prorettype = 0 OR
-    p1.pronargs < 0 OR p1.pronargs > 9;
+    p1.pronargs < 0 OR p1.pronargs > 9)
+	AND p1.proname !~ '^pl[^_]+_call_handler$';
 oid|proname
 ---+-------
 (0 rows)

src/test/regress/sql/opr_sanity.sql

@@ -25,8 +25,9 @@
 
 SELECT p1.oid, p1.proname
 FROM pg_proc as p1
-WHERE p1.prolang = 0 OR p1.prorettype = 0 OR
+WHERE (p1.prolang = 0 OR p1.prorettype = 0 OR
-    p1.pronargs < 0 OR p1.pronargs > 9;
+    p1.pronargs < 0 OR p1.pronargs > 9)
+	AND p1.proname !~ '^pl[^_]+_call_handler$';
 
 -- Look for conflicting proc definitions (same names and input datatypes).