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Install some slightly realistic cost estimation for bitmap index scans.

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This commit is contained in:
Tom Lane
2005-04-21 02:28:02 +00:00
parent 2f8c7c866c
commit e6f7edb9d5
8 changed files with 195 additions and 31 deletions
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4
src/include/optimizer/cost.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/optimizer/cost.h,v 1.64 2005/04/19 22:35:18 tgl Exp $
* $PostgreSQL: pgsql/src/include/optimizer/cost.h,v 1.65 2005/04/21 02:28:02 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -51,7 +51,7 @@ extern bool enable_hashjoin;
extern double clamp_row_est(double nrows);
extern void cost_seqscan(Path *path, Query *root, RelOptInfo *baserel);
extern void cost_index(Path *path, Query *root, IndexOptInfo *index,
extern void cost_index(IndexPath *path, Query *root, IndexOptInfo *index,
List *indexQuals, bool is_injoin);
extern void cost_bitmap_scan(Path *path, Query *root, RelOptInfo *baserel,
Node *bitmapqual, bool is_injoin);