Fix wrong/misleading comments, be more consistent about where to call

ExecAssignResultTypeFromTL().

src/backend/executor/nodeFunctionscan.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/executor/nodeFunctionscan.c,v 1.16 2002/12/15 16:17:46 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/executor/nodeFunctionscan.c,v 1.17 2003/01/12 22:01:38 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -247,7 +247,7 @@ ExecInitFunctionScan(FunctionScan *node, EState *estate)
 	scanstate->ss.ps.ps_TupFromTlist = false;
 
 	/*
-	 * initialize tuple type
+	 * Initialize result tuple type and projection info.
 	 */
 	ExecAssignResultTypeFromTL(&scanstate->ss.ps);
 	ExecAssignProjectionInfo(&scanstate->ss.ps);

src/backend/executor/nodeGroup.c

@@ -15,7 +15,7 @@
  *	  locate group boundaries.
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/executor/nodeGroup.c,v 1.54 2003/01/10 23:54:24 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/executor/nodeGroup.c,v 1.55 2003/01/12 22:01:38 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -180,8 +180,7 @@ ExecInitGroup(Group *node, EState *estate)
 	ExecAssignScanTypeFromOuterPlan(&grpstate->ss);
 
 	/*
-	 * Initialize tuple type for both result and scan. This node does no
-	 * projection
+	 * Initialize result tuple type and projection info.
 	 */
 	ExecAssignResultTypeFromTL(&grpstate->ss.ps);
 	ExecAssignProjectionInfo(&grpstate->ss.ps);

src/backend/executor/nodeIndexscan.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/executor/nodeIndexscan.c,v 1.76 2002/12/18 00:14:24 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/executor/nodeIndexscan.c,v 1.77 2003/01/12 22:01:38 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -583,9 +583,9 @@ ExecInitIndexScan(IndexScan *node, EState *estate)
 	ExecInitScanTupleSlot(estate, &indexstate->ss);
 
 	/*
-	 * initialize projection info.	result type comes from scan desc
-	 * below..
+	 * Initialize result tuple type and projection info.
 	 */
+	ExecAssignResultTypeFromTL(&indexstate->ss.ps);
 	ExecAssignProjectionInfo(&indexstate->ss.ps);
 
 	/*
@@ -893,7 +893,6 @@ ExecInitIndexScan(IndexScan *node, EState *estate)
 	 * get the scan type from the relation descriptor.
 	 */
 	ExecAssignScanType(&indexstate->ss, RelationGetDescr(currentRelation), false);
-	ExecAssignResultTypeFromTL(&indexstate->ss.ps);
 
 	/*
 	 * open the index relations and initialize relation and scan

src/backend/executor/nodeSeqscan.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/executor/nodeSeqscan.c,v 1.41 2002/12/15 16:17:46 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/executor/nodeSeqscan.c,v 1.42 2003/01/12 22:01:38 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -229,7 +229,7 @@ ExecInitSeqScan(SeqScan *node, EState *estate)
 	scanstate->ps.ps_TupFromTlist = false;
 
 	/*
-	 * initialize tuple type
+	 * Initialize result tuple type and projection info.
 	 */
 	ExecAssignResultTypeFromTL(&scanstate->ps);
 	ExecAssignProjectionInfo(&scanstate->ps);

src/backend/executor/nodeSubqueryscan.c

@@ -12,7 +12,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/executor/nodeSubqueryscan.c,v 1.16 2002/12/15 16:17:46 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/executor/nodeSubqueryscan.c,v 1.17 2003/01/12 22:01:38 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -189,7 +189,7 @@ ExecInitSubqueryScan(SubqueryScan *node, EState *estate)
 	subquerystate->ss.ps.ps_TupFromTlist = false;
 
 	/*
-	 * initialize tuple type
+	 * Initialize result tuple type and projection info.
 	 */
 	ExecAssignResultTypeFromTL(&subquerystate->ss.ps);
 	ExecAssignProjectionInfo(&subquerystate->ss.ps);

src/backend/executor/nodeTidscan.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/executor/nodeTidscan.c,v 1.30 2002/12/15 16:17:46 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/executor/nodeTidscan.c,v 1.31 2003/01/12 22:01:38 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -384,9 +384,9 @@ ExecInitTidScan(TidScan *node, EState *estate)
 	ExecInitScanTupleSlot(estate, &tidstate->ss);
 
 	/*
-	 * initialize projection info.	result type comes from scan desc
-	 * below..
+	 * Initialize result tuple type and projection info.
 	 */
+	ExecAssignResultTypeFromTL(&tidstate->ss.ps);
 	ExecAssignProjectionInfo(&tidstate->ss.ps);
 
 	/*
@@ -431,7 +431,6 @@ ExecInitTidScan(TidScan *node, EState *estate)
 	 * get the scan type from the relation descriptor.
 	 */
 	ExecAssignScanType(&tidstate->ss, RelationGetDescr(currentRelation), false);
-	ExecAssignResultTypeFromTL(&tidstate->ss.ps);
 
 	/*
 	 * if there are some PARAM_EXEC in skankeys then force tid rescan on