Fix an oversight in two different recent patches: nodes that support SRFs

in their targetlists had better reset ps_TupFromTlist during ReScan calls.
There's no need to back-patch here since nodeAgg and nodeGroup didn't
even pretend to support SRFs in prior releases.

src/backend/executor/nodeAgg.c

@@ -61,7 +61,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/executor/nodeAgg.c,v 1.162 2008/10/16 19:25:55 neilc Exp $
+ *	  $PostgreSQL: pgsql/src/backend/executor/nodeAgg.c,v 1.163 2008/10/23 15:29:23 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1284,6 +1284,8 @@ ExecInitAgg(Agg *node, EState *estate, int eflags)
 	ExecAssignResultTypeFromTL(&aggstate->ss.ps);
 	ExecAssignProjectionInfo(&aggstate->ss.ps, NULL);
 
+	aggstate->ss.ps.ps_TupFromTlist = false;
+
 	/*
 	 * get the count of aggregates in targetlist and quals
 	 */
@@ -1647,6 +1649,8 @@ ExecReScanAgg(AggState *node, ExprContext *exprCtxt)
 
 	node->agg_done = false;
 
+	node->ss.ps.ps_TupFromTlist = false;
+
 	if (((Agg *) node->ss.ps.plan)->aggstrategy == AGG_HASHED)
 	{
 		/*

src/backend/executor/nodeCtescan.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/executor/nodeCtescan.c,v 1.1 2008/10/04 21:56:53 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/executor/nodeCtescan.c,v 1.2 2008/10/23 15:29:23 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -303,11 +303,10 @@ ExecEndCteScan(CteScanState *node)
 void
 ExecCteScanReScan(CteScanState *node, ExprContext *exprCtxt)
 {
-	Tuplestorestate *tuplestorestate;
-
-	tuplestorestate = node->leader->cte_table;
+	Tuplestorestate *tuplestorestate = node->leader->cte_table;
 
 	ExecClearTuple(node->ss.ps.ps_ResultTupleSlot);
+	node->ss.ps.ps_TupFromTlist = false;
 
 	if (node->leader == node)
 	{

src/backend/executor/nodeGroup.c

@@ -15,7 +15,7 @@
  *	  locate group boundaries.
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/executor/nodeGroup.c,v 1.71 2008/09/08 00:22:56 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/executor/nodeGroup.c,v 1.72 2008/10/23 15:29:23 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -247,6 +247,8 @@ ExecInitGroup(Group *node, EState *estate, int eflags)
 	ExecAssignResultTypeFromTL(&grpstate->ss.ps);
 	ExecAssignProjectionInfo(&grpstate->ss.ps, NULL);
 
+	grpstate->ss.ps.ps_TupFromTlist = false;
+
 	/*
 	 * Precompute fmgr lookup data for inner loop
 	 */
@@ -286,6 +288,7 @@ void
 ExecReScanGroup(GroupState *node, ExprContext *exprCtxt)
 {
 	node->grp_done = FALSE;
+	node->ss.ps.ps_TupFromTlist = false;
 	/* must clear first tuple */
 	ExecClearTuple(node->ss.ss_ScanTupleSlot);
 

src/backend/executor/nodeWorktablescan.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/executor/nodeWorktablescan.c,v 1.2 2008/10/13 00:41:40 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/executor/nodeWorktablescan.c,v 1.3 2008/10/23 15:29:23 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -204,6 +204,8 @@ void
 ExecWorkTableScanReScan(WorkTableScanState *node, ExprContext *exprCtxt)
 {
 	ExecClearTuple(node->ss.ps.ps_ResultTupleSlot);
+	node->ss.ps.ps_TupFromTlist = false;
+
 	/* No need (or way) to rescan if ExecWorkTableScan not called yet */
 	if (node->rustate)
 		tuplestore_rescan(node->rustate->working_table);