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 1.34 2001/02/16 00:03:06 tgl 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(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(RelOptInfo *rel, List *tideval);
  36 extern AppendPath *create_append_path(RelOptInfo *rel, List *subpaths);
  37 extern Path *create_subqueryscan_path(RelOptInfo *rel);
  38
  39 extern NestPath *create_nestloop_path(RelOptInfo *joinrel,
  40                                                                           JoinType jointype,
  41                                                                           Path *outer_path,
  42                                                                           Path *inner_path,
  43                                                                           List *restrict_clauses,
  44                                                                           List *pathkeys);
  45
  46 extern MergePath *create_mergejoin_path(RelOptInfo *joinrel,
  47                                                                                 JoinType jointype,
  48                                                                                 Path *outer_path,
  49                                                                                 Path *inner_path,
  50                                                                                 List *restrict_clauses,
  51                                                                                 List *pathkeys,
  52                                                                                 List *mergeclauses,
  53                                                                                 List *outersortkeys,
  54                                                                                 List *innersortkeys);
  55
  56 extern HashPath *create_hashjoin_path(RelOptInfo *joinrel,
  57                                                                           JoinType jointype,
  58                                                                           Path *outer_path,
  59                                                                           Path *inner_path,
  60                                                                           List *restrict_clauses,
  61                                                                           List *hashclauses,
  62                                                                           Selectivity innerdispersion);
  63
  64 /*
  65  * prototypes for relnode.c
  66  */
  67 extern RelOptInfo *get_base_rel(Query *root, int relid);
  68 extern RelOptInfo *make_base_rel(Query *root, int relid);
  69 extern RelOptInfo *get_join_rel(Query *root,
  70                                                                 RelOptInfo *outer_rel,
  71                                                                 RelOptInfo *inner_rel,
  72                                                                 JoinType jointype,
  73                                                                 List **restrictlist_ptr);
  74
  75 #endif   /* PATHNODE_H */