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Make cost estimates for SubqueryScan more realistic: charge cpu_tuple_cost

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for each row processed, and don't forget the evaluation cost of any
restriction clauses attached to the node.  Per discussion with Greg Stark.
This commit is contained in:
Tom Lane
2003-07-14 22:35:54 +00:00
parent b800196230
commit 3d09f6c560
4 changed files with 53 additions and 9 deletions
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3
src/include/optimizer/cost.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: cost.h,v 1.53 2003/06/11 15:01:15 momjian Exp $
* $Id: cost.h,v 1.54 2003/07/14 22:35:54 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -56,6 +56,7 @@ extern void cost_index(Path *path, Query *root,
List *indexQuals, bool is_injoin);
extern void cost_tidscan(Path *path, Query *root,
RelOptInfo *baserel, List *tideval);
extern void cost_subqueryscan(Path *path, RelOptInfo *baserel);
extern void cost_functionscan(Path *path, Query *root,
RelOptInfo *baserel);
extern void cost_sort(Path *path, Query *root,