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postgresql/src/include/optimizer/pathnode.h

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Postgres95 1.01 Distribution - Virgin Sources
1996-07-09 08:22:35 +02:00
/*-------------------------------------------------------------------------
*
Change my-function-name-- to my_function_name, and optimizer renames.
1999-02-14 00:22:53 +01:00
* pathnode.h
Massive commit to run PGINDENT on all *.c and *.h files.
1997-09-07 07:04:48 +02:00
* prototypes for pathnode.c, indexnode.c, relnode.c.
Postgres95 1.01 Distribution - Virgin Sources
1996-07-09 08:22:35 +02:00
*
*
* Copyright (c) 1994, Regents of the University of California
*
Major planner/optimizer revision: get rid of PathOrder node type, 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.
1999-08-16 04:17:58 +02:00
* $Id: pathnode.h,v 1.21 1999/08/16 02:17:45 tgl Exp $
Postgres95 1.01 Distribution - Virgin Sources
1996-07-09 08:22:35 +02:00
*
*-------------------------------------------------------------------------
*/
#ifndef PATHNODE_H
#define PATHNODE_H
Cleanup up include files.
1997-11-26 02:14:33 +01:00
#include "nodes/relation.h"
Postgres95 1.01 Distribution - Virgin Sources
1996-07-09 08:22:35 +02:00
/*
* prototypes for pathnode.c
*/
Used modified version of indent that understands over 100 typedefs.
1997-09-08 23:56:23 +02:00
extern bool path_is_cheaper(Path *path1, Path *path2);
Another pgindent run. Sorry folks.
1999-05-26 00:43:53 +02:00
extern Path *set_cheapest(RelOptInfo *parent_rel, List *pathlist);
Major planner/optimizer revision: get rid of PathOrder node type, 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.
1999-08-16 04:17:58 +02:00
extern List *add_pathlist(RelOptInfo *parent_rel, List *old_paths,
List *new_paths);
Another pgindent run. Sorry folks.
1999-05-26 00:43:53 +02:00
extern Path *create_seqscan_path(RelOptInfo *rel);
Major planner/optimizer revision: get rid of PathOrder node type, 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.
1999-08-16 04:17:58 +02:00
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);
Another pgindent run. Sorry folks.
1999-05-26 00:43:53 +02:00
extern MergePath *create_mergejoin_path(RelOptInfo *joinrel, int outersize,
Major planner/optimizer revision: get rid of PathOrder node type, 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.
1999-08-16 04:17:58 +02:00
int innersize, int outerwidth, int innerwidth, Path *outer_path,
Path *inner_path, List *pathkeys,
List *mergeclauses, List *outersortkeys, List *innersortkeys);
Postgres95 1.01 Distribution - Virgin Sources
1996-07-09 08:22:35 +02:00
Another pgindent run. Sorry folks.
1999-05-26 00:43:53 +02:00
extern HashPath *create_hashjoin_path(RelOptInfo *joinrel, int outersize,
Revise generation of hashjoin paths: generate one path per hashjoinable clause, not one path for a randomly-chosen element of each set of clauses with the same join operator. That is, if you wrote SELECT ... WHERE t1.f1 = t2.f2 and t1.f3 = t2.f4, and both '=' ops were the same opcode (say, all four fields are int4), then the system would either consider hashing on f1=f2 or on f3=f4, but it would *not* consider both possibilities. Boo hiss. Also, revise estimation of hashjoin costs to include a penalty when the inner join var has a high disbursion --- ie, the most common value is pretty common. This tends to lead to badly skewed hash bucket occupancy and way more comparisons than you'd expect on average. I imagine that the cost calculation still needs tweaking, but at least it generates a more reasonable plan than before on George Young's example.
1999-08-06 06:00:17 +02:00
int innersize, int outerwidth, int innerwidth, Path *outer_path,
Major planner/optimizer revision: get rid of PathOrder node type, 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.
1999-08-16 04:17:58 +02:00
Path *inner_path, List *hashclauses, Cost innerdisbursion);
Postgres95 1.01 Distribution - Virgin Sources
1996-07-09 08:22:35 +02:00
/*
* prototypes for rel.c
*/
Fix bushy plans. Cleanup.
1999-02-18 01:49:48 +01:00
extern RelOptInfo *rel_member(Relids relid, List *rels);
Rename Rel to RelOptInfo.
1998-07-18 06:22:52 +02:00
extern RelOptInfo *get_base_rel(Query *root, int relid);
Fix bushy plans. Cleanup.
1999-02-18 01:49:48 +01:00
extern RelOptInfo *get_join_rel(Query *root, Relids relid);
Postgres95 1.01 Distribution - Virgin Sources
1996-07-09 08:22:35 +02:00
/*
* prototypes for indexnode.h
*/
Another pgindent run. Sorry folks.
1999-05-26 00:43:53 +02:00
extern List *find_relation_indices(Query *root, RelOptInfo *rel);
Postgres95 1.01 Distribution - Virgin Sources
1996-07-09 08:22:35 +02:00
OK, folks, here is the pgindent output.
1998-09-01 06:40:42 +02:00
#endif /* PATHNODE_H */