src/include/optimizer/pathnode.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * pathnode.h
   4  *        prototypes for pathnode.c, relnode.c.
   5  *
   6  *
   7  * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
   8  * Portions Copyright (c) 1994, Regents of the University of California
   9  *
  10  * $PostgreSQL$
  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(PlannerInfo *root, RelOptInfo *rel);
  31 extern IndexPath *create_index_path(PlannerInfo *root,
  32                                   IndexOptInfo *index,
  33                                   List *clause_groups,
  34                                   List *pathkeys,
  35                                   ScanDirection indexscandir,
  36                                   RelOptInfo *outer_rel);
  37 extern BitmapHeapPath *create_bitmap_heap_path(PlannerInfo *root,
  38                                                 RelOptInfo *rel,
  39                                                 Path *bitmapqual,
  40                                                 RelOptInfo *outer_rel);
  41 extern BitmapAndPath *create_bitmap_and_path(PlannerInfo *root,
  42                                            RelOptInfo *rel,
  43                                            List *bitmapquals);
  44 extern BitmapOrPath *create_bitmap_or_path(PlannerInfo *root,
  45                                           RelOptInfo *rel,
  46                                           List *bitmapquals);
  47 extern TidPath *create_tidscan_path(PlannerInfo *root, RelOptInfo *rel,
  48                                         List *tidquals);
  49 extern AppendPath *create_append_path(RelOptInfo *rel, List *subpaths);
  50 extern ResultPath *create_result_path(List *quals);
  51 extern MaterialPath *create_material_path(RelOptInfo *rel, Path *subpath);
  52 extern UniquePath *create_unique_path(PlannerInfo *root, RelOptInfo *rel,
  53                                    Path *subpath, SpecialJoinInfo *sjinfo);
  54 extern Path *create_subqueryscan_path(RelOptInfo *rel, List *pathkeys);
  55 extern Path *create_functionscan_path(PlannerInfo *root, RelOptInfo *rel);
  56 extern Path *create_valuesscan_path(PlannerInfo *root, RelOptInfo *rel);
  57 extern Path *create_ctescan_path(PlannerInfo *root, RelOptInfo *rel);
  58 extern Path *create_worktablescan_path(PlannerInfo *root, RelOptInfo *rel);
  59
  60 extern NestPath *create_nestloop_path(PlannerInfo *root,
  61                                          RelOptInfo *joinrel,
  62                                          JoinType jointype,
  63                                          SpecialJoinInfo *sjinfo,
  64                                          Path *outer_path,
  65                                          Path *inner_path,
  66                                          List *restrict_clauses,
  67                                          List *pathkeys);
  68
  69 extern MergePath *create_mergejoin_path(PlannerInfo *root,
  70                                           RelOptInfo *joinrel,
  71                                           JoinType jointype,
  72                                           SpecialJoinInfo *sjinfo,
  73                                           Path *outer_path,
  74                                           Path *inner_path,
  75                                           List *restrict_clauses,
  76                                           List *pathkeys,
  77                                           List *mergeclauses,
  78                                           List *outersortkeys,
  79                                           List *innersortkeys);
  80
  81 extern HashPath *create_hashjoin_path(PlannerInfo *root,
  82                                          RelOptInfo *joinrel,
  83                                          JoinType jointype,
  84                                          SpecialJoinInfo *sjinfo,
  85                                          Path *outer_path,
  86                                          Path *inner_path,
  87                                          List *restrict_clauses,
  88                                          List *hashclauses);
  89
  90 /*
  91  * prototypes for relnode.c
  92  */
  93 extern RelOptInfo *build_simple_rel(PlannerInfo *root, int relid,
  94                                  RelOptKind reloptkind);
  95 extern RelOptInfo *find_base_rel(PlannerInfo *root, int relid);
  96 extern RelOptInfo *find_join_rel(PlannerInfo *root, Relids relids);
  97 extern RelOptInfo *build_join_rel(PlannerInfo *root,
  98                            Relids joinrelids,
  99                            RelOptInfo *outer_rel,
 100                            RelOptInfo *inner_rel,
 101                            SpecialJoinInfo *sjinfo,
 102                            List **restrictlist_ptr);
 103
 104 #endif   /* PATHNODE_H */