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Minor performance improvement: avoid unnecessary creation/unioning of

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bitmaps for multiple indexscans.  Instead just let each indexscan add
TIDs directly into the BitmapOr node's result bitmap.
This commit is contained in:
Tom Lane
2005-04-20 15:48:36 +00:00
parent de4fbfadc5
commit 9d64632144
4 changed files with 65 additions and 17 deletions
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4
src/include/nodes/execnodes.h
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@ -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 1.126 2005/04/19 22:35:17 tgl Exp $
* $PostgreSQL: pgsql/src/include/nodes/execnodes.h,v 1.127 2005/04/20 15:48:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -901,6 +901,7 @@ typedef struct IndexScanState
/* ----------------
* BitmapIndexScanState information
*
* result bitmap to return output into, or NULL
* ScanKeys Skey structures to scan index rel
* NumScanKeys number of Skey structs
* RuntimeKeyInfo array of exprstates for Skeys
@ -914,6 +915,7 @@ typedef struct IndexScanState
typedef struct BitmapIndexScanState
{
ScanState ss; /* its first field is NodeTag */
TIDBitmap *biss_result;
ScanKey biss_ScanKeys;
int biss_NumScanKeys;
ExprState **biss_RuntimeKeyInfo;