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Simple constraint exclusion. For now, only child tables of inheritance

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scans are candidates for exclusion; this should be fixed eventually.
Simon Riggs, with some help from Tom Lane.
This commit is contained in:
Tom Lane
2005-07-23 21:05:48 +00:00
parent 9af9d674c6
commit d007a95055
14 changed files with 621 additions and 105 deletions
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3
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 1.68 2005/06/05 22:32:58 tgl Exp $
* $PostgreSQL: pgsql/src/include/optimizer/cost.h,v 1.69 2005/07/23 21:05:48 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -49,6 +49,7 @@ extern bool enable_hashagg;
extern bool enable_nestloop;
extern bool enable_mergejoin;
extern bool enable_hashjoin;
extern bool enable_constraint_exclusion;
extern double clamp_row_est(double nrows);
extern void cost_seqscan(Path *path, PlannerInfo *root, RelOptInfo *baserel);

4
src/include/optimizer/plancat.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/plancat.h,v 1.36 2005/06/05 22:32:58 tgl Exp $
* $PostgreSQL: pgsql/src/include/optimizer/plancat.h,v 1.37 2005/07/23 21:05:48 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -19,6 +19,8 @@
extern void get_relation_info(Oid relationObjectId, RelOptInfo *rel);
extern List *get_relation_constraints(Oid relationObjectId, RelOptInfo *rel);
extern List *build_physical_tlist(PlannerInfo *root, RelOptInfo *rel);
extern List *find_inheritance_children(Oid inhparent);

4
src/include/optimizer/predtest.h
View File

@@ -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/predtest.h,v 1.1 2005/06/10 22:25:37 tgl Exp $
* $PostgreSQL: pgsql/src/include/optimizer/predtest.h,v 1.2 2005/07/23 21:05:48 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -19,5 +19,7 @@
extern bool predicate_implied_by(List *predicate_list,
List *restrictinfo_list);
extern bool predicate_refuted_by(List *predicate_list,
List *restrictinfo_list);
#endif /* PREDTEST_H */