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) 1996-2001, PostgreSQL Global Development Group
   8  * Portions Copyright (c) 1994, Regents of the University of California
   9  *
  10  * $Id: pathnode.h,v 1.40 2001/10/28 06:26:07 momjian Exp $
  11  *
  12  *-------------------------------------------------------------------------
  13  */
  14 #ifndef PATHNODE_H
  15 #define PATHNODE_H
  16
  17 #include "nodes/relation.h"
  18
  19 /*
  20  * prototypes for pathnode.c
  21  */
  22 extern int compare_path_costs(Path *path1, Path *path2,
  23                                    CostSelector criterion);
  24 extern int compare_fractional_path_costs(Path *path1, Path *path2,
  25                                                           double fraction);
  26 extern void set_cheapest(RelOptInfo *parent_rel);
  27 extern void add_path(RelOptInfo *parent_rel, Path *new_path);
  28
  29 extern Path *create_seqscan_path(Query *root, RelOptInfo *rel);
  30 extern IndexPath *create_index_path(Query *root, RelOptInfo *rel,
  31                                   IndexOptInfo *index,
  32                                   List *restriction_clauses,
  33                                   List *pathkeys,
  34                                   ScanDirection indexscandir);
  35 extern TidPath *create_tidscan_path(Query *root, RelOptInfo *rel,
  36                                         List *tideval);
  37 extern AppendPath *create_append_path(RelOptInfo *rel, List *subpaths);
  38 extern Path *create_subqueryscan_path(RelOptInfo *rel);
  39
  40 extern NestPath *create_nestloop_path(Query *root,
  41                                          RelOptInfo *joinrel,
  42                                          JoinType jointype,
  43                                          Path *outer_path,
  44                                          Path *inner_path,
  45                                          List *restrict_clauses,
  46                                          List *pathkeys);
  47
  48 extern MergePath *create_mergejoin_path(Query *root,
  49                                           RelOptInfo *joinrel,
  50                                           JoinType jointype,
  51                                           Path *outer_path,
  52                                           Path *inner_path,
  53                                           List *restrict_clauses,
  54                                           List *pathkeys,
  55                                           List *mergeclauses,
  56                                           List *outersortkeys,
  57                                           List *innersortkeys);
  58
  59 extern HashPath *create_hashjoin_path(Query *root,
  60                                          RelOptInfo *joinrel,
  61                                          JoinType jointype,
  62                                          Path *outer_path,
  63                                          Path *inner_path,
  64                                          List *restrict_clauses,
  65                                          List *hashclauses);
  66
  67 /*
  68  * prototypes for relnode.c
  69  */
  70 extern RelOptInfo *build_base_rel(Query *root, int relid);
  71 extern RelOptInfo *build_other_rel(Query *root, int relid);
  72 extern RelOptInfo *find_base_rel(Query *root, int relid);
  73 extern RelOptInfo *build_join_rel(Query *root,
  74                            RelOptInfo *outer_rel,
  75                            RelOptInfo *inner_rel,
  76                            JoinType jointype,
  77                            List **restrictlist_ptr);
  78
  79 #endif   /* PATHNODE_H */