1996-07-09 08:22:35 +02:00
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/*-------------------------------------------------------------------------
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*
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* paths.h--
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* prototypes for various files in optimizer/paths (were separate
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* header files
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*
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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1996-08-28 09:27:54 +02:00
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* $Id: paths.h,v 1.1 1996/08/28 07:23:19 scrappy Exp $
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1996-07-09 08:22:35 +02:00
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PATHS_H
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#define PATHS_H
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/*
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* allpaths.h
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*/
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extern List *find_paths(Query *root, List *rels);
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/*
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* indxpath.h
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* routines to generate index paths
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*/
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extern List *find_index_paths(Query *root, Rel *rel, List *indices,
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List *clauseinfo_list,
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List *joininfo_list);
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/*
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* joinpath.h
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* routines to create join paths
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*/
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extern void find_all_join_paths(Query *root, List *joinrels);
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/*
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* orindxpath.h
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*/
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extern List *create_or_index_paths(Query *root, Rel *rel, List *clauses);
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/*
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* hashutils.h
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* routines to deal with hash keys and clauses
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*/
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extern List *group_clauses_by_hashop(List *clauseinfo_list,
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int inner_relid);
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/*
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* joinutils.h
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* generic join method key/clause routines
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*/
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extern List *match_pathkeys_joinkeys(List *pathkeys,
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List *joinkeys, List *joinclauses, int which_subkey,
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List **matchedJoinClausesPtr);
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extern List *extract_path_keys(List *joinkeys, List *tlist,
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int which_subkey);
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extern Path *match_paths_joinkeys(List *joinkeys, PathOrder *ordering,
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List *paths, int which_subkey);
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extern List *new_join_pathkeys(List *outer_pathkeys,
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List *join_rel_tlist, List *joinclauses);
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/*
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* mergeutils.h
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* routines to deal with merge keys and clauses
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*/
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extern List *group_clauses_by_order(List *clauseinfo_list,
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int inner_relid);
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extern MInfo *match_order_mergeinfo(PathOrder *ordering,
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List *mergeinfo_list);
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/*
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* joinrels.h
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* routines to determine which relations to join
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*/
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extern List *find_join_rels(Query *root, List *outer_rels);
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extern void add_new_joininfos(Query *root, List *joinrels, List *outerrels);
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extern List *final_join_rels(List *join_rel_list);
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/*
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* prototypes for path/prune.c
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*/
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extern List *prune_joinrels(List *rel_list);
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extern void prune_rel_paths(List *rel_list);
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extern Path *prune_rel_path(Rel *rel, Path *unorderedpath);
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extern List *merge_joinrels(List *rel_list1, List *rel_list2);
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extern List *prune_oldrels(List *old_rels);
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#endif /* PATHS_H */
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