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/*-------------------------------------------------------------------------
*
* paths.h--
* prototypes for various files in optimizer/paths (were separate
* header files
*
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: paths.h,v 1.1 1996/08/28 07:23:19 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef PATHS_H
#define PATHS_H
/*
* allpaths.h
*/
extern List *find_paths(Query *root, List *rels);
/*
* indxpath.h
* routines to generate index paths
*/
extern List *find_index_paths(Query *root, Rel *rel, List *indices,
List *clauseinfo_list,
List *joininfo_list);
/*
* joinpath.h
* routines to create join paths
*/
extern void find_all_join_paths(Query *root, List *joinrels);
/*
* orindxpath.h
*/
extern List *create_or_index_paths(Query *root, Rel *rel, List *clauses);
/*
* hashutils.h
* routines to deal with hash keys and clauses
*/
extern List *group_clauses_by_hashop(List *clauseinfo_list,
int inner_relid);
/*
* joinutils.h
* generic join method key/clause routines
*/
extern List *match_pathkeys_joinkeys(List *pathkeys,
List *joinkeys, List *joinclauses, int which_subkey,
List **matchedJoinClausesPtr);
extern List *extract_path_keys(List *joinkeys, List *tlist,
int which_subkey);
extern Path *match_paths_joinkeys(List *joinkeys, PathOrder *ordering,
List *paths, int which_subkey);
extern List *new_join_pathkeys(List *outer_pathkeys,
List *join_rel_tlist, List *joinclauses);
/*
* mergeutils.h
* routines to deal with merge keys and clauses
*/
extern List *group_clauses_by_order(List *clauseinfo_list,
int inner_relid);
extern MInfo *match_order_mergeinfo(PathOrder *ordering,
List *mergeinfo_list);
/*
* joinrels.h
* routines to determine which relations to join
*/
extern List *find_join_rels(Query *root, List *outer_rels);
extern void add_new_joininfos(Query *root, List *joinrels, List *outerrels);
extern List *final_join_rels(List *join_rel_list);
/*
* prototypes for path/prune.c
*/
extern List *prune_joinrels(List *rel_list);
extern void prune_rel_paths(List *rel_list);
extern Path *prune_rel_path(Rel *rel, Path *unorderedpath);
extern List *merge_joinrels(List *rel_list1, List *rel_list2);
extern List *prune_oldrels(List *old_rels);
#endif /* PATHS_H */
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