Get rid of ExecAssignResultTypeFromOuterPlan() and make all plan node types

generate their output tuple descriptors from their target lists (ie, using
ExecAssignResultTypeFromTL()).  We long ago fixed things so that all node
types have minimally valid tlists, so there's no longer any good reason to
have two different ways of doing it.  This change is needed to fix bug
reported by Hayden James: the fix of 2005-11-03 to emit the correct column
names after optimizing away a SubqueryScan node didn't work if the new
top-level plan node used ExecAssignResultTypeFromOuterPlan to generate its
tupdesc, since the next plan node down won't have the correct column labels.

src/backend/executor/execUtils.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/executor/execUtils.c,v 1.128 2005/11/22 18:17:10 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/executor/execUtils.c,v 1.129 2005/11/23 20:27:57 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -435,22 +435,6 @@ ExecAssignResultType(PlanState *planstate,
 	ExecSetSlotDescriptor(slot, tupDesc, shouldFree);
 }
 
-/* ----------------
- *		ExecAssignResultTypeFromOuterPlan
- * ----------------
- */
-void
-ExecAssignResultTypeFromOuterPlan(PlanState *planstate)
-{
-	PlanState  *outerPlan;
-	TupleDesc	tupDesc;
-
-	outerPlan = outerPlanState(planstate);
-	tupDesc = ExecGetResultType(outerPlan);
-
-	ExecAssignResultType(planstate, tupDesc, false);
-}
-
 /* ----------------
  *		ExecAssignResultTypeFromTL
  * ----------------

src/backend/executor/nodeHash.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/executor/nodeHash.c,v 1.98 2005/11/22 18:17:10 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/executor/nodeHash.c,v 1.99 2005/11/23 20:27:57 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -164,7 +164,7 @@ ExecInitHash(Hash *node, EState *estate)
 	 * initialize tuple type. no need to initialize projection info because
 	 * this node doesn't do projections
 	 */
-	ExecAssignResultTypeFromOuterPlan(&hashstate->ps);
+	ExecAssignResultTypeFromTL(&hashstate->ps);
 	hashstate->ps.ps_ProjInfo = NULL;
 
 	return hashstate;

src/backend/executor/nodeLimit.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/executor/nodeLimit.c,v 1.22 2005/10/15 02:49:17 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/executor/nodeLimit.c,v 1.23 2005/11/23 20:27:57 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -327,7 +327,7 @@ ExecInitLimit(Limit *node, EState *estate)
 	 * limit nodes do no projections, so initialize projection info for this
 	 * node appropriately
 	 */
-	ExecAssignResultTypeFromOuterPlan(&limitstate->ps);
+	ExecAssignResultTypeFromTL(&limitstate->ps);
 	limitstate->ps.ps_ProjInfo = NULL;
 
 	return limitstate;

src/backend/executor/nodeMaterial.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/executor/nodeMaterial.c,v 1.50 2005/10/15 02:49:17 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/executor/nodeMaterial.c,v 1.51 2005/11/23 20:27:57 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -195,7 +195,7 @@ ExecInitMaterial(Material *node, EState *estate)
 	 * initialize tuple type.  no need to initialize projection info because
 	 * this node doesn't do projections.
 	 */
-	ExecAssignResultTypeFromOuterPlan(&matstate->ss.ps);
+	ExecAssignResultTypeFromTL(&matstate->ss.ps);
 	ExecAssignScanTypeFromOuterPlan(&matstate->ss);
 	matstate->ss.ps.ps_ProjInfo = NULL;
 

src/backend/executor/nodeSetOp.c

@@ -21,7 +21,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/executor/nodeSetOp.c,v 1.18 2005/10/15 02:49:17 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/executor/nodeSetOp.c,v 1.19 2005/11/23 20:27:57 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -258,7 +258,7 @@ ExecInitSetOp(SetOp *node, EState *estate)
 	 * setop nodes do no projections, so initialize projection info for this
 	 * node appropriately
 	 */
-	ExecAssignResultTypeFromOuterPlan(&setopstate->ps);
+	ExecAssignResultTypeFromTL(&setopstate->ps);
 	setopstate->ps.ps_ProjInfo = NULL;
 
 	/*

src/backend/executor/nodeSort.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/executor/nodeSort.c,v 1.51 2005/10/15 02:49:17 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/executor/nodeSort.c,v 1.52 2005/11/23 20:27:57 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -193,7 +193,7 @@ ExecInitSort(Sort *node, EState *estate)
 	 * initialize tuple type.  no need to initialize projection info because
 	 * this node doesn't do projections.
 	 */
-	ExecAssignResultTypeFromOuterPlan(&sortstate->ss.ps);
+	ExecAssignResultTypeFromTL(&sortstate->ss.ps);
 	ExecAssignScanTypeFromOuterPlan(&sortstate->ss);
 	sortstate->ss.ps.ps_ProjInfo = NULL;
 

src/backend/executor/nodeUnique.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/executor/nodeUnique.c,v 1.49 2005/11/22 18:17:10 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/executor/nodeUnique.c,v 1.50 2005/11/23 20:27:57 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -150,7 +150,7 @@ ExecInitUnique(Unique *node, EState *estate)
 	 * unique nodes do no projections, so initialize projection info for this
 	 * node appropriately
 	 */
-	ExecAssignResultTypeFromOuterPlan(&uniquestate->ps);
+	ExecAssignResultTypeFromTL(&uniquestate->ps);
 	uniquestate->ps.ps_ProjInfo = NULL;
 
 	/*

src/include/executor/executor.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/executor/executor.h,v 1.120 2005/10/15 02:49:44 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/executor/executor.h,v 1.121 2005/11/23 20:27:58 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -218,7 +218,6 @@ extern ExprContext *MakePerTupleExprContext(EState *estate);
 extern void ExecAssignExprContext(EState *estate, PlanState *planstate);
 extern void ExecAssignResultType(PlanState *planstate,
 					 TupleDesc tupDesc, bool shouldFree);
-extern void ExecAssignResultTypeFromOuterPlan(PlanState *planstate);
 extern void ExecAssignResultTypeFromTL(PlanState *planstate);
 extern TupleDesc ExecGetResultType(PlanState *planstate);
 extern ProjectionInfo *ExecBuildProjectionInfo(List *targetList,