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be03eb25f3
create_index_paths are not immediately discarded, but are available for subsequent planner work. This allows avoiding redundant syscache lookups in several places. Change interface to operator selectivity estimation procedures to allow faster and more flexible estimation. Initdb forced due to change of pg_proc entries for selectivity functions!
76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/*-------------------------------------------------------------------------
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*
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* pathnode.h
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* prototypes for pathnode.c, relnode.c.
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*
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*
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* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Id: pathnode.h,v 1.37 2001/05/20 20:28:20 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PATHNODE_H
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#define PATHNODE_H
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#include "nodes/relation.h"
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/*
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* prototypes for pathnode.c
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*/
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extern int compare_path_costs(Path *path1, Path *path2,
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CostSelector criterion);
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extern int compare_fractional_path_costs(Path *path1, Path *path2,
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double fraction);
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extern void set_cheapest(RelOptInfo *parent_rel);
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extern void add_path(RelOptInfo *parent_rel, Path *new_path);
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extern Path *create_seqscan_path(RelOptInfo *rel);
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extern IndexPath *create_index_path(Query *root, RelOptInfo *rel,
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IndexOptInfo *index,
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List *restriction_clauses,
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List *pathkeys,
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ScanDirection indexscandir);
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extern TidPath *create_tidscan_path(RelOptInfo *rel, List *tideval);
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extern AppendPath *create_append_path(RelOptInfo *rel, List *subpaths);
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extern Path *create_subqueryscan_path(RelOptInfo *rel);
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extern NestPath *create_nestloop_path(RelOptInfo *joinrel,
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JoinType jointype,
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Path *outer_path,
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Path *inner_path,
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List *restrict_clauses,
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List *pathkeys);
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extern MergePath *create_mergejoin_path(RelOptInfo *joinrel,
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JoinType jointype,
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Path *outer_path,
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Path *inner_path,
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List *restrict_clauses,
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List *pathkeys,
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List *mergeclauses,
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List *outersortkeys,
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List *innersortkeys);
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extern HashPath *create_hashjoin_path(RelOptInfo *joinrel,
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JoinType jointype,
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Path *outer_path,
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Path *inner_path,
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List *restrict_clauses,
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List *hashclauses,
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Selectivity innerbucketsize);
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/*
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* prototypes for relnode.c
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*/
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extern RelOptInfo *build_base_rel(Query *root, int relid);
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extern RelOptInfo *build_other_rel(Query *root, int relid);
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extern RelOptInfo *find_base_rel(Query *root, int relid);
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extern RelOptInfo *build_join_rel(Query *root,
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RelOptInfo *outer_rel,
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RelOptInfo *inner_rel,
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JoinType jointype,
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List **restrictlist_ptr);
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#endif /* PATHNODE_H */
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