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/*-------------------------------------------------------------------------
*
* pathnode.h--
* prototypes for pathnode.c, indexnode.c, relnode.c.
*
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: pathnode.h,v 1.1.1.1 1996/07/09 06:21:34 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef PATHNODE_H
#define PATHNODE_H
/*
* prototypes for pathnode.c
*/
extern bool path_is_cheaper(Path *path1, Path *path2);
extern Path *set_cheapest(Rel *parent_rel, List *pathlist);
extern List *add_pathlist(Rel *parent_rel, List *unique_paths,
List *new_paths);
extern Path *create_seqscan_path(Rel *rel);
extern IndexPath *create_index_path(Query *root, Rel *rel, Rel *index,
List *restriction_clauses, bool is_join_scan);
extern JoinPath *create_nestloop_path(Rel *joinrel, Rel *outer_rel,
Path *outer_path, Path *inner_path, List *keys);
extern MergePath *create_mergesort_path(Rel *joinrel, int outersize,
int innersize, int outerwidth, int innerwidth, Path *outer_path,
Path *inner_path, List *keys, MergeOrder *order,
List *mergeclauses, List *outersortkeys, List *innersortkeys);
extern HashPath *create_hashjoin_path(Rel *joinrel, int outersize,
int innersize, int outerwidth, int innerwidth, Path *outer_path,
Path *inner_path, List *keys, Oid operator, List *hashclauses,
List *outerkeys, List *innerkeys);
/*
* prototypes for rel.c
*/
extern Rel *rel_member(List *relid, List *rels);
extern Rel *get_base_rel(Query* root, int relid);
extern Rel *get_join_rel(Query* root, List *relid);
/*
* prototypes for indexnode.h
*/
extern List *find_relation_indices(Query *root,Rel *rel);
#endif /* PATHNODE_H */
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