Teach nodeSort and nodeMaterial to optimize out unnecessary overhead

when the passed-down eflags indicate they can.
Simon Riggs and Tom Lane

1 files changed, 4 insertions, 2 deletions

diff --git a/src/include/nodes/execnodes.h b/src/include/nodes/execnodes.h
index d07dc57297c..f277672a1c4 100644
--- a/src/include/nodes/execnodes.h
+++ b/src/include/nodes/execnodes.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/nodes/execnodes.h,v 1.147 2005/12/28 01:30:01 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/nodes/execnodes.h,v 1.148 2006/02/28 05:48:44 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1185,8 +1185,9 @@ typedef struct HashJoinState
 typedef struct MaterialState
 {
 	ScanState	ss;				/* its first field is NodeTag */
-	void	   *tuplestorestate;	/* private state of tuplestore.c */
+	bool		randomAccess;	/* need random access to subplan output? */
 	bool		eof_underlying; /* reached end of underlying plan? */
+	void	   *tuplestorestate;	/* private state of tuplestore.c */
 } MaterialState;
 
 /* ----------------
@@ -1196,6 +1197,7 @@ typedef struct MaterialState
 typedef struct SortState
 {
 	ScanState	ss;				/* its first field is NodeTag */
+	bool		randomAccess;	/* need random access to sort output? */
 	bool		sort_Done;		/* sort completed yet? */
 	void	   *tuplesortstate; /* private state of tuplesort.c */
 } SortState;