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Fix nasty bug in optimization of multiway joins: optimizer

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would sometimes generate a plan that omitted a sort step before merge.
This commit is contained in:
Tom Lane
1999-04-03 00:18:28 +00:00
parent 97c52abcc5
commit ff38837fe9
4 changed files with 35 additions and 41 deletions
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8
src/include/optimizer/paths.h
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@@ -7,7 +7,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: paths.h,v 1.26 1999/02/22 05:26:52 momjian Exp $
* $Id: paths.h,v 1.27 1999/04/03 00:18:26 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -48,7 +48,7 @@ extern List *create_or_index_paths(Query *root, RelOptInfo *rel, List *clauses);
* routines to deal with hash keys and clauses
*/
extern List *group_clauses_by_hashop(List *restrictinfo_list,
int inner_relid);
Relids inner_relids);
/*
* joinutils.h
@@ -70,9 +70,9 @@ extern List *new_join_pathkeys(List *outer_pathkeys,
* routines to deal with merge keys and clauses
*/
extern List *group_clauses_by_order(List *restrictinfo_list,
int inner_relid);
Relids inner_relids);
extern MergeInfo *match_order_mergeinfo(PathOrder *ordering,
List *mergeinfo_list);
List *mergeinfo_list);
/*
* joinrels.h