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/*-------------------------------------------------------------------------
*
* pathnode.h
* prototypes for pathnode.c, relnode.c.
*
*
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: pathnode.h,v 1.37 2001/05/20 20:28:20 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef PATHNODE_H
#define PATHNODE_H
#include "nodes/relation.h"
/*
* prototypes for pathnode.c
*/
extern int compare_path_costs(Path *path1, Path *path2,
CostSelector criterion);
extern int compare_fractional_path_costs(Path *path1, Path *path2,
double fraction);
extern void set_cheapest(RelOptInfo *parent_rel);
extern void add_path(RelOptInfo *parent_rel, Path *new_path);
extern Path *create_seqscan_path(RelOptInfo *rel);
extern IndexPath *create_index_path(Query *root, RelOptInfo *rel,
IndexOptInfo *index,
List *restriction_clauses,
List *pathkeys,
ScanDirection indexscandir);
extern TidPath *create_tidscan_path(RelOptInfo *rel, List *tideval);
extern AppendPath *create_append_path(RelOptInfo *rel, List *subpaths);
extern Path *create_subqueryscan_path(RelOptInfo *rel);
extern NestPath *create_nestloop_path(RelOptInfo *joinrel,
JoinType jointype,
Path *outer_path,
Path *inner_path,
List *restrict_clauses,
List *pathkeys);
extern MergePath *create_mergejoin_path(RelOptInfo *joinrel,
JoinType jointype,
Path *outer_path,
Path *inner_path,
List *restrict_clauses,
List *pathkeys,
List *mergeclauses,
List *outersortkeys,
List *innersortkeys);
extern HashPath *create_hashjoin_path(RelOptInfo *joinrel,
JoinType jointype,
Path *outer_path,
Path *inner_path,
List *restrict_clauses,
List *hashclauses,
Selectivity innerbucketsize);
/*
* prototypes for relnode.c
*/
extern RelOptInfo *build_base_rel(Query *root, int relid);
extern RelOptInfo *build_other_rel(Query *root, int relid);
extern RelOptInfo *find_base_rel(Query *root, int relid);
extern RelOptInfo *build_join_rel(Query *root,
RelOptInfo *outer_rel,
RelOptInfo *inner_rel,
JoinType jointype,
List **restrictlist_ptr);
#endif /* PATHNODE_H */
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