1 /*-------------------------------------------------------------------------
4 * prototypes for various files in optimizer/paths (were separate
8 * Copyright (c) 1994, Regents of the University of California
10 * $Id: paths.h,v 1.14 1999/02/12 05:57:08 momjian Exp $
12 *-------------------------------------------------------------------------
17 #include "nodes/nodes.h"
18 #include "nodes/parsenodes.h"
19 #include "nodes/relation.h"
24 extern List *find_paths(Query *root, List *rels);
28 * routines to generate index paths
30 extern List *find_index_paths(Query *root, RelOptInfo *rel, List *indices,
31 List *restrictinfo_list,
36 * routines to create join paths
38 extern void find_all_join_paths(Query *root, List *joinrels);
44 extern List *create_or_index_paths(Query *root, RelOptInfo *rel, List *clauses);
48 * routines to deal with hash keys and clauses
50 extern List *group_clauses_by_hashop(List *restrictinfo_list,
55 * generic join method key/clause routines
57 extern List *match_pathkeys_joinkeys(List *pathkeys,
58 List *joinkeys, List *joinclauses, int which_subkey,
59 List **matchedJoinClausesPtr);
60 extern List *extract_path_keys(List *joinkeys, List *tlist,
62 extern Path *match_paths_joinkeys(List *joinkeys, PathOrder *ordering,
63 List *paths, int which_subkey);
64 extern List *new_join_pathkeys(List *outer_pathkeys,
65 List *join_rel_tlist, List *joinclauses);
69 * routines to deal with merge keys and clauses
71 extern List *group_clauses_by_order(List *restrictinfo_list,
73 extern MergeInfo *match_order_mergeinfo(PathOrder *ordering,
74 List *mergeinfo_list);
78 * routines to determine which relations to join
80 extern List *find_join_rels(Query *root, List *outer_rels);
81 extern void add_new_joininfos(Query *root, List *joinrels, List *outerrels);
82 extern List *final_join_rels(List *join_rel_list);
85 * prototypes for path/prune.c
87 extern void prune_joinrels(List *rel_list);
88 extern void rels_set_cheapest(List *rel_list);
89 extern List *merge_joinrels(List *rel_list1, List *rel_list2);
90 extern List *prune_oldrels(List *old_rels);