granicus.if.org Git - postgresql/blob - src/include/optimizer/pathnode.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * pathnode.h
   4  *        prototypes for pathnode.c, relnode.c.
   5  *
   6  *
   7  * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
   8  * Portions Copyright (c) 1994, Regents of the University of California
   9  *
  10  * $PostgreSQL: pgsql/src/include/optimizer/pathnode.h,v 1.59 2005/04/21 19:18:13 tgl Exp $
  11  *
  12  *-------------------------------------------------------------------------
  13  */
  14 #ifndef PATHNODE_H
  15 #define PATHNODE_H
  16
  17 #include "nodes/relation.h"
  18
  19
  20 /*
  21  * prototypes for pathnode.c
  22  */
  23 extern int compare_path_costs(Path *path1, Path *path2,
  24                                    CostSelector criterion);
  25 extern int compare_fractional_path_costs(Path *path1, Path *path2,
  26                                                           double fraction);
  27 extern void set_cheapest(RelOptInfo *parent_rel);
  28 extern void add_path(RelOptInfo *parent_rel, Path *new_path);
  29
  30 extern Path *create_seqscan_path(Query *root, RelOptInfo *rel);
  31 extern IndexPath *create_index_path(Query *root,
  32                                   IndexOptInfo *index,
  33                                   List *restriction_clauses,
  34                                   List *pathkeys,
  35                                   ScanDirection indexscandir);
  36 extern BitmapHeapPath *create_bitmap_heap_path(Query *root,
  37                                                                                            RelOptInfo *rel,
  38                                                                                            Path *bitmapqual);
  39 extern BitmapAndPath *create_bitmap_and_path(Query *root,
  40                                                                                          RelOptInfo *rel,
  41                                                                                          List *bitmapquals);
  42 extern BitmapOrPath *create_bitmap_or_path(Query *root,
  43                                                                                    RelOptInfo *rel,
  44                                                                                    List *bitmapquals);
  45 extern TidPath *create_tidscan_path(Query *root, RelOptInfo *rel,
  46                                         List *tideval);
  47 extern AppendPath *create_append_path(RelOptInfo *rel, List *subpaths);
  48 extern ResultPath *create_result_path(RelOptInfo *rel, Path *subpath,
  49                                    List *constantqual);
  50 extern MaterialPath *create_material_path(RelOptInfo *rel, Path *subpath);
  51 extern UniquePath *create_unique_path(Query *root, RelOptInfo *rel,
  52                                    Path *subpath);
  53 extern Path *create_subqueryscan_path(RelOptInfo *rel, List *pathkeys);
  54 extern Path *create_functionscan_path(Query *root, RelOptInfo *rel);
  55
  56 extern NestPath *create_nestloop_path(Query *root,
  57                                          RelOptInfo *joinrel,
  58                                          JoinType jointype,
  59                                          Path *outer_path,
  60                                          Path *inner_path,
  61                                          List *restrict_clauses,
  62                                          List *pathkeys);
  63
  64 extern MergePath *create_mergejoin_path(Query *root,
  65                                           RelOptInfo *joinrel,
  66                                           JoinType jointype,
  67                                           Path *outer_path,
  68                                           Path *inner_path,
  69                                           List *restrict_clauses,
  70                                           List *pathkeys,
  71                                           List *mergeclauses,
  72                                           List *outersortkeys,
  73                                           List *innersortkeys);
  74
  75 extern HashPath *create_hashjoin_path(Query *root,
  76                                          RelOptInfo *joinrel,
  77                                          JoinType jointype,
  78                                          Path *outer_path,
  79                                          Path *inner_path,
  80                                          List *restrict_clauses,
  81                                          List *hashclauses);
  82
  83 /*
  84  * prototypes for relnode.c
  85  */
  86 extern void build_base_rel(Query *root, int relid);
  87 extern RelOptInfo *build_other_rel(Query *root, int relid);
  88 extern RelOptInfo *find_base_rel(Query *root, int relid);
  89 extern RelOptInfo *find_join_rel(Query *root, Relids relids);
  90 extern RelOptInfo *build_join_rel(Query *root,
  91                            Relids joinrelids,
  92                            RelOptInfo *outer_rel,
  93                            RelOptInfo *inner_rel,
  94                            JoinType jointype,
  95                            List **restrictlist_ptr);
  96
  97 #endif   /* PATHNODE_H */