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) 1996-2002, PostgreSQL Global Development Group
   8  * Portions Copyright (c) 1994, Regents of the University of California
   9  *
  10  * $Id: pathnode.h,v 1.49 2003/02/08 20:20:55 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, RelOptInfo *rel,
  32                                   IndexOptInfo *index,
  33                                   List *restriction_clauses,
  34                                   List *pathkeys,
  35                                   ScanDirection indexscandir);
  36 extern TidPath *create_tidscan_path(Query *root, RelOptInfo *rel,
  37                                         List *tideval);
  38 extern AppendPath *create_append_path(RelOptInfo *rel, List *subpaths);
  39 extern ResultPath *create_result_path(RelOptInfo *rel, Path *subpath,
  40                                                                           List *constantqual);
  41 extern MaterialPath *create_material_path(RelOptInfo *rel, Path *subpath);
  42 extern UniquePath *create_unique_path(Query *root, RelOptInfo *rel,
  43                                                                           Path *subpath);
  44 extern Path *create_subqueryscan_path(RelOptInfo *rel);
  45 extern Path *create_functionscan_path(Query *root, RelOptInfo *rel);
  46
  47 extern NestPath *create_nestloop_path(Query *root,
  48                                          RelOptInfo *joinrel,
  49                                          JoinType jointype,
  50                                          Path *outer_path,
  51                                          Path *inner_path,
  52                                          List *restrict_clauses,
  53                                          List *pathkeys);
  54
  55 extern MergePath *create_mergejoin_path(Query *root,
  56                                           RelOptInfo *joinrel,
  57                                           JoinType jointype,
  58                                           Path *outer_path,
  59                                           Path *inner_path,
  60                                           List *restrict_clauses,
  61                                           List *pathkeys,
  62                                           List *mergeclauses,
  63                                           List *outersortkeys,
  64                                           List *innersortkeys);
  65
  66 extern HashPath *create_hashjoin_path(Query *root,
  67                                          RelOptInfo *joinrel,
  68                                          JoinType jointype,
  69                                          Path *outer_path,
  70                                          Path *inner_path,
  71                                          List *restrict_clauses,
  72                                          List *hashclauses);
  73
  74 /*
  75  * prototypes for relnode.c
  76  */
  77 extern void build_base_rel(Query *root, int relid);
  78 extern RelOptInfo *build_other_rel(Query *root, int relid);
  79 extern RelOptInfo *find_base_rel(Query *root, int relid);
  80 extern RelOptInfo *build_join_rel(Query *root,
  81                                                                   Relids joinrelids,
  82                                                                   RelOptInfo *outer_rel,
  83                                                                   RelOptInfo *inner_rel,
  84                                                                   JoinType jointype,
  85                                                                   List **restrictlist_ptr);
  86
  87 #endif   /* PATHNODE_H */