src/include/utils/selfuncs.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * selfuncs.h
   4  *        Selectivity functions and index cost estimation functions for
   5  *        standard operators and index access methods.
   6  *
   7  *
   8  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
   9  * Portions Copyright (c) 1994, Regents of the University of California
  10  *
  11  * $Id: selfuncs.h,v 1.14 2003/08/04 00:43:32 momjian Exp $
  12  *
  13  *-------------------------------------------------------------------------
  14  */
  15 #ifndef SELFUNCS_H
  16 #define SELFUNCS_H
  17
  18 #include "fmgr.h"
  19 #include "nodes/parsenodes.h"
  20
  21
  22 typedef enum
  23 {
  24         Pattern_Type_Like, Pattern_Type_Like_IC,
  25         Pattern_Type_Regex, Pattern_Type_Regex_IC
  26 } Pattern_Type;
  27
  28 typedef enum
  29 {
  30         Pattern_Prefix_None, Pattern_Prefix_Partial, Pattern_Prefix_Exact
  31 } Pattern_Prefix_Status;
  32
  33
  34 /* selfuncs.c */
  35
  36 extern Pattern_Prefix_Status pattern_fixed_prefix(Const *patt,
  37                                          Pattern_Type ptype,
  38                                          Const **prefix,
  39                                          Const **rest);
  40 extern Const *make_greater_string(const Const *str_const);
  41
  42 extern Datum eqsel(PG_FUNCTION_ARGS);
  43 extern Datum neqsel(PG_FUNCTION_ARGS);
  44 extern Datum scalarltsel(PG_FUNCTION_ARGS);
  45 extern Datum scalargtsel(PG_FUNCTION_ARGS);
  46 extern Datum regexeqsel(PG_FUNCTION_ARGS);
  47 extern Datum icregexeqsel(PG_FUNCTION_ARGS);
  48 extern Datum likesel(PG_FUNCTION_ARGS);
  49 extern Datum iclikesel(PG_FUNCTION_ARGS);
  50 extern Datum regexnesel(PG_FUNCTION_ARGS);
  51 extern Datum icregexnesel(PG_FUNCTION_ARGS);
  52 extern Datum nlikesel(PG_FUNCTION_ARGS);
  53 extern Datum icnlikesel(PG_FUNCTION_ARGS);
  54
  55 extern Datum eqjoinsel(PG_FUNCTION_ARGS);
  56 extern Datum neqjoinsel(PG_FUNCTION_ARGS);
  57 extern Datum scalarltjoinsel(PG_FUNCTION_ARGS);
  58 extern Datum scalargtjoinsel(PG_FUNCTION_ARGS);
  59 extern Datum regexeqjoinsel(PG_FUNCTION_ARGS);
  60 extern Datum icregexeqjoinsel(PG_FUNCTION_ARGS);
  61 extern Datum likejoinsel(PG_FUNCTION_ARGS);
  62 extern Datum iclikejoinsel(PG_FUNCTION_ARGS);
  63 extern Datum regexnejoinsel(PG_FUNCTION_ARGS);
  64 extern Datum icregexnejoinsel(PG_FUNCTION_ARGS);
  65 extern Datum nlikejoinsel(PG_FUNCTION_ARGS);
  66 extern Datum icnlikejoinsel(PG_FUNCTION_ARGS);
  67
  68 extern Selectivity booltestsel(Query *root, BoolTestType booltesttype,
  69                         Node *arg, int varRelid, JoinType jointype);
  70 extern Selectivity nulltestsel(Query *root, NullTestType nulltesttype,
  71                         Node *arg, int varRelid);
  72
  73 extern void mergejoinscansel(Query *root, Node *clause,
  74                                  Selectivity *leftscan,
  75                                  Selectivity *rightscan);
  76
  77 extern double estimate_num_groups(Query *root, List *groupExprs,
  78                                         double input_rows);
  79
  80 extern Datum btcostestimate(PG_FUNCTION_ARGS);
  81 extern Datum rtcostestimate(PG_FUNCTION_ARGS);
  82 extern Datum hashcostestimate(PG_FUNCTION_ARGS);
  83 extern Datum gistcostestimate(PG_FUNCTION_ARGS);
  84
  85 #endif   /* SELFUNCS_H */