src/include/optimizer/plancat.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * plancat.h
   4  *        prototypes for plancat.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: pgsql/src/include/optimizer/plancat.h,v 1.54 2009/06/11 14:49:11 momjian Exp $
  11  *
  12  *-------------------------------------------------------------------------
  13  */
  14 #ifndef PLANCAT_H
  15 #define PLANCAT_H
  16
  17 #include "nodes/relation.h"
  18 #include "utils/relcache.h"
  19
  20 /* Hook for plugins to get control in get_relation_info() */
  21 typedef void (*get_relation_info_hook_type) (PlannerInfo *root,
  22                                                                                                                  Oid relationObjectId,
  23                                                                                                                  bool inhparent,
  24                                                                                                                  RelOptInfo *rel);
  25 extern PGDLLIMPORT get_relation_info_hook_type get_relation_info_hook;
  26
  27
  28 extern void get_relation_info(PlannerInfo *root, Oid relationObjectId,
  29                                   bool inhparent, RelOptInfo *rel);
  30
  31 extern void estimate_rel_size(Relation rel, int32 *attr_widths,
  32                                   BlockNumber *pages, double *tuples);
  33
  34 extern bool relation_excluded_by_constraints(PlannerInfo *root,
  35                                                                  RelOptInfo *rel, RangeTblEntry *rte);
  36
  37 extern List *build_physical_tlist(PlannerInfo *root, RelOptInfo *rel);
  38
  39 extern bool has_unique_index(RelOptInfo *rel, AttrNumber attno);
  40
  41 extern Selectivity restriction_selectivity(PlannerInfo *root,
  42                                                 Oid operator,
  43                                                 List *args,
  44                                                 int varRelid);
  45
  46 extern Selectivity join_selectivity(PlannerInfo *root,
  47                                  Oid operator,
  48                                  List *args,
  49                                  JoinType jointype,
  50                                  SpecialJoinInfo *sjinfo);
  51
  52 #endif   /* PLANCAT_H */