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Major planner/optimizer revision: get rid of PathOrder node type,

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store all ordering information in pathkeys lists (which are now lists of
lists of PathKeyItem nodes, not just lists of lists of vars).  This was
a big win --- the code is smaller and IMHO more understandable than it
was, even though it handles more cases.  I believe the node changes will
not force an initdb for anyone; planner nodes don't show up in stored
rules.
This commit is contained in:
Tom Lane
1999-08-16 02:17:58 +00:00
parent 08320bfb22
commit e6381966c1
43 changed files with 1937 additions and 3270 deletions
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28
src/include/optimizer/pathnode.h
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@@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: pathnode.h,v 1.20 1999/08/06 04:00:13 tgl Exp $
* $Id: pathnode.h,v 1.21 1999/08/16 02:17:45 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -20,22 +20,26 @@
*/
extern bool path_is_cheaper(Path *path1, Path *path2);
extern Path *set_cheapest(RelOptInfo *parent_rel, List *pathlist);
extern List *add_pathlist(RelOptInfo *parent_rel, List *unique_paths,
List *new_paths);
extern List *add_pathlist(RelOptInfo *parent_rel, List *old_paths,
List *new_paths);
extern Path *create_seqscan_path(RelOptInfo *rel);
extern IndexPath *create_index_path(Query *root, RelOptInfo *rel, RelOptInfo *index,
List *restriction_clauses);
extern NestPath *create_nestloop_path(RelOptInfo *joinrel, RelOptInfo *outer_rel,
Path *outer_path, Path *inner_path, List *pathkeys);
extern IndexPath *create_index_path(Query *root, RelOptInfo *rel,
RelOptInfo *index, List *restriction_clauses);
extern NestPath *create_nestloop_path(RelOptInfo *joinrel,
RelOptInfo *outer_rel, Path *outer_path, Path *inner_path,
List *pathkeys);
extern MergePath *create_mergejoin_path(RelOptInfo *joinrel, int outersize,
int innersize, int outerwidth, int innerwidth, Path *outer_path,
Path *inner_path, List *pathkeys, MergeOrder *order,
List *mergeclauses, List *outersortkeys, List *innersortkeys);
int innersize, int outerwidth, int innerwidth, Path *outer_path,
Path *inner_path, List *pathkeys,
List *mergeclauses, List *outersortkeys, List *innersortkeys);
extern HashPath *create_hashjoin_path(RelOptInfo *joinrel, int outersize,
int innersize, int outerwidth, int innerwidth, Path *outer_path,
Path *inner_path, List *pathkeys, Oid operator, List *hashclauses,
List *outerkeys, List *innerkeys, Cost innerdisbursion);
Path *inner_path, List *hashclauses, Cost innerdisbursion);
/*
* prototypes for rel.c