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Make use of statistics on index expressions. There are still some

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corner cases that could stand improvement, but it does all the basic
stuff.  A byproduct is that the selectivity routines are no longer
constrained to working on simple Vars; we might in future be able to
improve the behavior for subexpressions that don't match indexes.
This commit is contained in:
Tom Lane
2004-02-17 00:52:53 +00:00
parent d372bba02d
commit a536ed53bc
5 changed files with 1108 additions and 1025 deletions
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3
src/include/optimizer/pathnode.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/optimizer/pathnode.h,v 1.53 2003/11/29 22:41:07 pgsql Exp $
* $PostgreSQL: pgsql/src/include/optimizer/pathnode.h,v 1.54 2004/02/17 00:52:53 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -77,6 +77,7 @@ extern HashPath *create_hashjoin_path(Query *root,
extern void build_base_rel(Query *root, int relid);
extern RelOptInfo *build_other_rel(Query *root, int relid);
extern RelOptInfo *find_base_rel(Query *root, int relid);
extern RelOptInfo *find_join_rel(Query *root, Relids relids);
extern RelOptInfo *build_join_rel(Query *root,
Relids joinrelids,
RelOptInfo *outer_rel,