Extend the ExecInitNode API so that plan nodes receive a set of flag

bits indicating which optional capabilities can actually be exercised
at runtime.  This will allow Sort and Material nodes, and perhaps later
other nodes, to avoid unnecessary overhead in common cases.
This commit just adds the infrastructure and arranges to pass the correct
flag values down to plan nodes; none of the actual optimizations are here
yet.  I'm committing this separately in case anyone wants to measure the
added overhead.  (It should be negligible.)

Simon Riggs and Tom Lane

1 files changed, 2 insertions, 2 deletions

diff --git a/src/include/executor/nodeBitmapHeapscan.h b/src/include/executor/nodeBitmapHeapscan.h
index 48c4b6ad79..f61fd8946d 100644
--- a/src/include/executor/nodeBitmapHeapscan.h
+++ b/src/include/executor/nodeBitmapHeapscan.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/nodeBitmapHeapscan.h,v 1.1 2005/04/19 22:35:17 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/executor/nodeBitmapHeapscan.h,v 1.2 2006/02/28 04:10:28 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -17,7 +17,7 @@
 #include "nodes/execnodes.h"
 
 extern int	ExecCountSlotsBitmapHeapScan(BitmapHeapScan *node);
-extern BitmapHeapScanState *ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate);
+extern BitmapHeapScanState *ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags);
 extern TupleTableSlot *ExecBitmapHeapScan(BitmapHeapScanState *node);
 extern void ExecEndBitmapHeapScan(BitmapHeapScanState *node);
 extern void ExecBitmapHeapReScan(BitmapHeapScanState *node, ExprContext *exprCtxt);