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) 1996-2006, 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 1.73 2006/12/23 00:43:13 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(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);
  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
  58 extern NestPath *create_nestloop_path(PlannerInfo *root,
  59                                          RelOptInfo *joinrel,
  60                                          JoinType jointype,
  61                                          Path *outer_path,
  62                                          Path *inner_path,
  63                                          List *restrict_clauses,
  64                                          List *pathkeys);
  65
  66 extern MergePath *create_mergejoin_path(PlannerInfo *root,
  67                                           RelOptInfo *joinrel,
  68                                           JoinType jointype,
  69                                           Path *outer_path,
  70                                           Path *inner_path,
  71                                           List *restrict_clauses,
  72                                           List *pathkeys,
  73                                           List *mergeclauses,
  74                                           List *mergefamilies,
  75                                           List *mergestrategies,
  76                                           List *outersortkeys,
  77                                           List *innersortkeys);
  78
  79 extern HashPath *create_hashjoin_path(PlannerInfo *root,
  80                                          RelOptInfo *joinrel,
  81                                          JoinType jointype,
  82                                          Path *outer_path,
  83                                          Path *inner_path,
  84                                          List *restrict_clauses,
  85                                          List *hashclauses);
  86
  87 /*
  88  * prototypes for relnode.c
  89  */
  90 extern RelOptInfo *build_simple_rel(PlannerInfo *root, int relid,
  91                                  RelOptKind reloptkind);
  92 extern RelOptInfo *find_base_rel(PlannerInfo *root, int relid);
  93 extern RelOptInfo *find_join_rel(PlannerInfo *root, Relids relids);
  94 extern RelOptInfo *build_join_rel(PlannerInfo *root,
  95                            Relids joinrelids,
  96                            RelOptInfo *outer_rel,
  97                            RelOptInfo *inner_rel,
  98                            JoinType jointype,
  99                            List **restrictlist_ptr);
 100
 101 #endif   /* PATHNODE_H */