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Adjust nestloop-with-inner-indexscan plan generation so that we catch

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some cases of redundant clauses that were formerly not caught.  We have
to special-case this because the clauses involved never get attached to
the same join restrictlist and so the existing logic does not notice
that they are redundant.
This commit is contained in:
Tom Lane
2003-06-15 22:51:45 +00:00
parent 3fb6f1347f
commit cb02610e50
10 changed files with 284 additions and 137 deletions
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6
src/include/optimizer/restrictinfo.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: restrictinfo.h,v 1.16 2002/11/24 21:52:15 tgl Exp $
* $Id: restrictinfo.h,v 1.17 2003/06/15 22:51:45 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -23,5 +23,9 @@ extern void get_actual_join_clauses(List *restrictinfo_list,
extern List *remove_redundant_join_clauses(Query *root,
List *restrictinfo_list,
JoinType jointype);
extern List *select_nonredundant_join_clauses(Query *root,
List *restrictinfo_list,
List *reference_list,
JoinType jointype);
#endif /* RESTRICTINFO_H */