72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
/*-------------------------------------------------------------------------
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*
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* pathnode.h
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* prototypes for pathnode.c, indexnode.c, relnode.c.
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*
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*
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* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
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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 1.27 2000/04/12 17:16:42 momjian 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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ScanDirection indexscandir);
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extern TidPath *create_tidscan_path(RelOptInfo *rel, List *tideval);
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extern NestPath *create_nestloop_path(RelOptInfo *joinrel,
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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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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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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 innerdisbursion);
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/*
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* prototypes for relnode.c
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*/
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extern RelOptInfo *get_base_rel(Query *root, int relid);
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extern RelOptInfo *get_join_rel(Query *root, RelOptInfo *outer_rel,
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RelOptInfo *inner_rel,
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List **restrictlist_ptr);
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/*
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* prototypes for indexnode.h
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*/
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extern List *find_relation_indices(Query *root, RelOptInfo *rel);
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#endif /* PATHNODE_H */
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