mirror of https://github.com/postgres/postgres
Optimizer can now estimate selectivity of IS NULL, IS NOT NULL,
IS TRUE, etc, with some degree of verisimilitude. Split out selectivity support functions from builtins.h into a new header file selfuncs.h, so as to reduce the number of header files builtins.h must depend on. Fix a few missing inclusions exposed thereby. From Joe Conway, with some kibitzing from Tom Lane.
This commit is contained in:
Tom Lane
parent
c31545af27
commit
4d58a7ca87
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/access/common/tupdesc.c,v 1.74 2001/05/07 00:43:15 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/access/common/tupdesc.c,v 1.75 2001/06/25 21:11:43 tgl Exp $
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*
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* NOTES
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* some of the executor utility code such as "ExecTypeFromTL" should be
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@ -20,6 +20,7 @@
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#include "postgres.h"
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#include "catalog/pg_type.h"
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#include "nodes/parsenodes.h"
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#include "parser/parse_type.h"
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#include "utils/builtins.h"
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#include "utils/syscache.h"
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@ -7,14 +7,13 @@
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* Copyright (c) 1999-2001, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/commands/comment.c,v 1.30 2001/06/13 21:44:40 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/commands/comment.c,v 1.31 2001/06/25 21:11:43 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "utils/builtins.h"
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#include "access/heapam.h"
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#include "catalog/catname.h"
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#include "catalog/indexing.h"
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@ -26,11 +25,12 @@
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#include "catalog/pg_class.h"
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#include "commands/comment.h"
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#include "miscadmin.h"
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#include "parser/parse.h"
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#include "parser/parse_expr.h"
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#include "parser/parse_func.h"
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#include "parser/parse.h"
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#include "rewrite/rewriteRemove.h"
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#include "utils/acl.h"
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#include "utils/builtins.h"
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#include "utils/fmgroids.h"
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#include "utils/syscache.h"
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@ -717,7 +717,7 @@ CommentOperator(char *opername, List *arguments, char *comment)
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/*** Get the procedure associated with the operator ***/
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data = (Form_pg_operator) GETSTRUCT(optuple);
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oid = RegprocToOid(data->oprcode);
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oid = data->oprcode;
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if (oid == InvalidOid)
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elog(ERROR, "operator '%s' does not have an underlying function", opername);
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/optimizer/path/clausesel.c,v 1.45 2001/06/05 05:26:04 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/optimizer/path/clausesel.c,v 1.46 2001/06/25 21:11:43 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -24,6 +24,7 @@
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#include "parser/parsetree.h"
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#include "utils/fmgroids.h"
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#include "utils/lsyscache.h"
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#include "utils/selfuncs.h"
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/* note that pg_type.h hardwires size of bool as 1 ... duplicate it */
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@ -509,6 +510,16 @@ clause_selectivity(Query *root,
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*/
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s1 = (Selectivity) 0.5;
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}
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else if (IsA(clause, NullTest))
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{
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/* Use node specific selectivity calculation function */
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s1 = nulltestsel(root, (NullTest *) clause, varRelid);
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}
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else if (IsA(clause, BooleanTest))
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{
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/* Use node specific selectivity calculation function */
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s1 = booltestsel(root, (BooleanTest *) clause, varRelid);
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}
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else if (IsA(clause, RelabelType))
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{
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/* Not sure this case is needed, but it can't hurt */
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@ -517,5 +528,9 @@ clause_selectivity(Query *root,
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varRelid);
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}
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#ifdef SELECTIVITY_DEBUG
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elog(NOTICE, "clause_selectivity: s1 %f", s1);
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#endif /* SELECTIVITY_DEBUG */
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return s1;
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}
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@ -9,7 +9,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.107 2001/06/17 02:05:19 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.108 2001/06/25 21:11:43 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -37,6 +37,7 @@
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#include "utils/builtins.h"
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#include "utils/fmgroids.h"
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#include "utils/lsyscache.h"
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#include "utils/selfuncs.h"
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#include "utils/syscache.h"
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@ -6,7 +6,7 @@
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* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.190 2001/06/23 00:07:34 momjian Exp $
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* $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.191 2001/06/25 21:11:44 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -33,6 +33,7 @@
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#include "rewrite/rewriteManip.h"
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#include "utils/builtins.h"
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#include "utils/fmgroids.h"
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#include "utils/numeric.h"
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#include "utils/relcache.h"
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#include "utils/syscache.h"
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@ -1,7 +1,7 @@
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/* -----------------------------------------------------------------------
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* formatting.c
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*
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/formatting.c,v 1.37 2001/05/03 22:53:07 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/formatting.c,v 1.38 2001/06/25 21:11:44 tgl Exp $
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*
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*
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* Portions Copyright (c) 1999-2000, PostgreSQL Global Development Group
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@ -67,21 +67,23 @@
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#define DEBUG_elog_output NOTICE
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***/
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#include <stdio.h>
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#include <string.h>
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#include "postgres.h"
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#include <ctype.h>
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#include <sys/time.h>
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#include <unistd.h>
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#ifdef USE_LOCALE
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#include <locale.h>
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#endif
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#include <math.h>
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#include <float.h>
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#include "postgres.h"
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#include "utils/builtins.h"
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#include "utils/date.h"
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#include "utils/datetime.h"
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#include "utils/formatting.h"
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#include "utils/int8.h"
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#include "utils/numeric.h"
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#include "utils/pg_locale.h"
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/* ----------
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@ -15,7 +15,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/selfuncs.c,v 1.93 2001/06/09 22:16:18 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/selfuncs.c,v 1.94 2001/06/25 21:11:44 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -93,6 +93,7 @@
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#include "utils/date.h"
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#include "utils/int8.h"
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#include "utils/lsyscache.h"
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#include "utils/selfuncs.h"
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#include "utils/syscache.h"
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/*
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@ -117,6 +118,10 @@
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/* default number of distinct values in a table */
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#define DEFAULT_NUM_DISTINCT 200
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/* default selectivity estimate for boolean and null test nodes */
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#define DEFAULT_UNK_SEL 0.005
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#define DEFAULT_NOT_UNK_SEL (1.0 - DEFAULT_UNK_SEL)
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#define DEFAULT_BOOL_SEL 0.5
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static bool convert_to_scalar(Datum value, Oid valuetypid, double *scaledvalue,
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Datum lobound, Datum hibound, Oid boundstypid,
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@ -933,6 +938,327 @@ icnlikesel(PG_FUNCTION_ARGS)
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PG_RETURN_FLOAT8(result);
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}
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/*
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* booltestsel - Selectivity of BooleanTest Node.
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*/
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Selectivity
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booltestsel(Query *root, BooleanTest *clause, int varRelid)
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{
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Var *var;
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Node *arg;
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Oid relid;
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HeapTuple statsTuple;
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Datum *values;
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int nvalues;
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float4 *numbers;
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int nnumbers;
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double selec;
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Assert(clause && IsA(clause, BooleanTest));
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arg = (Node *) clause->arg;
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/*
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* Ignore any binary-compatible relabeling (probably unnecessary,
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* but can't hurt)
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*/
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if (IsA(arg, RelabelType))
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arg = ((RelabelType *) arg)->arg;
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if (IsA(arg, Var) && (varRelid == 0 || varRelid == ((Var *) arg)->varno))
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var = (Var *) arg;
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else
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{
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/*
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* If argument is not a Var, we can't get statistics for it, but
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* perhaps clause_selectivity can do something with it. We ignore
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* the possibility of a NULL value when using clause_selectivity,
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* and just assume the value is either TRUE or FALSE.
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*/
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switch (clause->booltesttype)
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{
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case IS_UNKNOWN:
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selec = DEFAULT_UNK_SEL;
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break;
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case IS_NOT_UNKNOWN:
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selec = DEFAULT_NOT_UNK_SEL;
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break;
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case IS_TRUE:
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case IS_NOT_FALSE:
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selec = (double) clause_selectivity(root, arg, varRelid);
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break;
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case IS_FALSE:
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case IS_NOT_TRUE:
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selec = 1.0 - (double) clause_selectivity(root, arg, varRelid);
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break;
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default:
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elog(ERROR, "booltestsel: unexpected booltesttype %d",
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(int) clause->booltesttype);
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selec = 0.0; /* Keep compiler quiet */
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break;
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}
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return (Selectivity) selec;
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}
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/* get stats for the attribute, if available */
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relid = getrelid(var->varno, root->rtable);
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if (relid == InvalidOid)
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statsTuple = NULL;
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else
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statsTuple = SearchSysCache(STATRELATT,
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ObjectIdGetDatum(relid),
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Int16GetDatum(var->varattno),
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0, 0);
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if (HeapTupleIsValid(statsTuple))
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{
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Form_pg_statistic stats;
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double freq_null;
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stats = (Form_pg_statistic) GETSTRUCT(statsTuple);
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freq_null = stats->stanullfrac;
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if (get_attstatsslot(statsTuple, var->vartype, var->vartypmod,
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STATISTIC_KIND_MCV, InvalidOid,
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&values, &nvalues,
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&numbers, &nnumbers)
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&& nnumbers > 0)
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{
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double freq_true;
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double freq_false;
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/*
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* Get first MCV frequency and derive frequency for true.
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*/
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if (DatumGetBool(values[0]))
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freq_true = numbers[0];
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else
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freq_true = 1.0 - numbers[0] - freq_null;
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/*
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* Next derive freqency for false.
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* Then use these as appropriate to derive frequency for each case.
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*/
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freq_false = 1.0 - freq_true - freq_null;
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switch (clause->booltesttype)
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{
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case IS_UNKNOWN:
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/* select only NULL values */
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selec = freq_null;
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break;
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case IS_NOT_UNKNOWN:
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/* select non-NULL values */
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selec = 1.0 - freq_null;
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break;
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case IS_TRUE:
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/* select only TRUE values */
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selec = freq_true;
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break;
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case IS_NOT_TRUE:
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/* select non-TRUE values */
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selec = 1.0 - freq_true;
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break;
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case IS_FALSE:
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/* select only FALSE values */
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selec = freq_false;
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break;
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case IS_NOT_FALSE:
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/* select non-FALSE values */
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selec = 1.0 - freq_false;
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break;
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default:
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elog(ERROR, "booltestsel: unexpected booltesttype %d",
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(int) clause->booltesttype);
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selec = 0.0; /* Keep compiler quiet */
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break;
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}
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free_attstatsslot(var->vartype, values, nvalues,
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numbers, nnumbers);
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}
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else
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{
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/*
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* No most-common-value info available.
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* Still have null fraction information,
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* so use it for IS [NOT] UNKNOWN.
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* Otherwise adjust for null fraction and
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* assume an even split for boolean tests.
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*/
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switch (clause->booltesttype)
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{
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case IS_UNKNOWN:
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/*
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* Use freq_null directly.
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*/
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selec = freq_null;
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break;
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case IS_NOT_UNKNOWN:
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/*
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* Select not unknown (not null) values.
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* Calculate from freq_null.
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*/
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selec = 1.0 - freq_null;
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break;
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case IS_TRUE:
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case IS_NOT_TRUE:
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case IS_FALSE:
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case IS_NOT_FALSE:
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selec = (1.0 - freq_null) / 2.0;
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break;
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default:
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elog(ERROR, "booltestsel: unexpected booltesttype %d",
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(int) clause->booltesttype);
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selec = 0.0; /* Keep compiler quiet */
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break;
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}
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}
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ReleaseSysCache(statsTuple);
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}
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else
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{
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/*
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* No VACUUM ANALYZE stats available, so use a default value.
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* (Note: not much point in recursing to clause_selectivity here.)
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*/
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switch (clause->booltesttype)
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{
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case IS_UNKNOWN:
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selec = DEFAULT_UNK_SEL;
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break;
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case IS_NOT_UNKNOWN:
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selec = DEFAULT_NOT_UNK_SEL;
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break;
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case IS_TRUE:
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case IS_NOT_TRUE:
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case IS_FALSE:
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case IS_NOT_FALSE:
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selec = DEFAULT_BOOL_SEL;
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break;
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default:
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elog(ERROR, "booltestsel: unexpected booltesttype %d",
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(int) clause->booltesttype);
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selec = 0.0; /* Keep compiler quiet */
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break;
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}
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}
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/* result should be in range, but make sure... */
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if (selec < 0.0)
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selec = 0.0;
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else if (selec > 1.0)
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selec = 1.0;
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return (Selectivity) selec;
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}
|
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|
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/*
|
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* nulltestsel - Selectivity of NullTest Node.
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*/
|
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Selectivity
|
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nulltestsel(Query *root, NullTest *clause, int varRelid)
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{
|
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Var *var;
|
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Node *arg;
|
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Oid relid;
|
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HeapTuple statsTuple;
|
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double selec;
|
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double defselec;
|
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double freq_null;
|
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|
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Assert(clause && IsA(clause, NullTest));
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switch (clause->nulltesttype)
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{
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case IS_NULL:
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defselec = DEFAULT_UNK_SEL;
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break;
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case IS_NOT_NULL:
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defselec = DEFAULT_NOT_UNK_SEL;
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break;
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default:
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elog(ERROR, "nulltestsel: unexpected nulltesttype %d",
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(int) clause->nulltesttype);
|
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return (Selectivity) 0; /* keep compiler quiet */
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}
|
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|
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arg = (Node *) clause->arg;
|
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|
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/*
|
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* Ignore any binary-compatible relabeling
|
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*/
|
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if (IsA(arg, RelabelType))
|
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arg = ((RelabelType *) arg)->arg;
|
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|
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if (IsA(arg, Var) && (varRelid == 0 || varRelid == ((Var *) arg)->varno))
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var = (Var *) arg;
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else
|
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{
|
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/*
|
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* punt if non-Var argument
|
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*/
|
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return (Selectivity) defselec;
|
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}
|
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|
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relid = getrelid(var->varno, root->rtable);
|
||||
if (relid == InvalidOid)
|
||||
return (Selectivity) defselec;
|
||||
|
||||
/* get stats for the attribute, if available */
|
||||
statsTuple = SearchSysCache(STATRELATT,
|
||||
ObjectIdGetDatum(relid),
|
||||
Int16GetDatum(var->varattno),
|
||||
0, 0);
|
||||
if (HeapTupleIsValid(statsTuple))
|
||||
{
|
||||
Form_pg_statistic stats;
|
||||
|
||||
stats = (Form_pg_statistic) GETSTRUCT(statsTuple);
|
||||
freq_null = stats->stanullfrac;
|
||||
|
||||
switch (clause->nulltesttype)
|
||||
{
|
||||
case IS_NULL:
|
||||
/*
|
||||
* Use freq_null directly.
|
||||
*/
|
||||
selec = freq_null;
|
||||
break;
|
||||
case IS_NOT_NULL:
|
||||
/*
|
||||
* Select not unknown (not null) values.
|
||||
* Calculate from freq_null.
|
||||
*/
|
||||
selec = 1.0 - freq_null;
|
||||
break;
|
||||
default:
|
||||
elog(ERROR, "nulltestsel: unexpected nulltesttype %d",
|
||||
(int) clause->nulltesttype);
|
||||
return (Selectivity) 0; /* keep compiler quiet */
|
||||
}
|
||||
|
||||
ReleaseSysCache(statsTuple);
|
||||
}
|
||||
else
|
||||
{
|
||||
/*
|
||||
* No VACUUM ANALYZE stats available, so make a guess
|
||||
*/
|
||||
selec = defselec;
|
||||
}
|
||||
|
||||
/* result should be in range, but make sure... */
|
||||
if (selec < 0.0)
|
||||
selec = 0.0;
|
||||
else if (selec > 1.0)
|
||||
selec = 1.0;
|
||||
|
||||
return (Selectivity) selec;
|
||||
}
|
||||
|
||||
/*
|
||||
* eqjoinsel - Join selectivity of "="
|
||||
*/
|
||||
|
|
|
|||
|
|
@ -7,7 +7,7 @@
|
|||
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $Id: builtins.h,v 1.155 2001/06/17 02:05:20 tgl Exp $
|
||||
* $Id: builtins.h,v 1.156 2001/06/25 21:11:45 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -15,9 +15,8 @@
|
|||
#define BUILTINS_H
|
||||
|
||||
#include "fmgr.h"
|
||||
#include "nodes/relation.h" /* for amcostestimate parameters */
|
||||
#include "storage/itemptr.h"
|
||||
#include "utils/numeric.h"
|
||||
#include "nodes/primnodes.h"
|
||||
|
||||
|
||||
/*
|
||||
* Defined in adt/
|
||||
|
|
@ -342,57 +341,6 @@ extern char *deparse_expression(Node *expr, List *dpcontext,
|
|||
bool forceprefix);
|
||||
extern List *deparse_context_for(char *relname, Oid relid);
|
||||
|
||||
/* selfuncs.c */
|
||||
extern Datum eqsel(PG_FUNCTION_ARGS);
|
||||
extern Datum neqsel(PG_FUNCTION_ARGS);
|
||||
extern Datum scalarltsel(PG_FUNCTION_ARGS);
|
||||
extern Datum scalargtsel(PG_FUNCTION_ARGS);
|
||||
extern Datum regexeqsel(PG_FUNCTION_ARGS);
|
||||
extern Datum icregexeqsel(PG_FUNCTION_ARGS);
|
||||
extern Datum likesel(PG_FUNCTION_ARGS);
|
||||
extern Datum iclikesel(PG_FUNCTION_ARGS);
|
||||
extern Datum regexnesel(PG_FUNCTION_ARGS);
|
||||
extern Datum icregexnesel(PG_FUNCTION_ARGS);
|
||||
extern Datum nlikesel(PG_FUNCTION_ARGS);
|
||||
extern Datum icnlikesel(PG_FUNCTION_ARGS);
|
||||
|
||||
extern Datum eqjoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum neqjoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum scalarltjoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum scalargtjoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum regexeqjoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum icregexeqjoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum likejoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum iclikejoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum regexnejoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum icregexnejoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum nlikejoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum icnlikejoinsel(PG_FUNCTION_ARGS);
|
||||
|
||||
extern Datum btcostestimate(PG_FUNCTION_ARGS);
|
||||
extern Datum rtcostestimate(PG_FUNCTION_ARGS);
|
||||
extern Datum hashcostestimate(PG_FUNCTION_ARGS);
|
||||
extern Datum gistcostestimate(PG_FUNCTION_ARGS);
|
||||
|
||||
/* selfuncs.c supporting routines that are also used by optimizer code */
|
||||
typedef enum
|
||||
{
|
||||
Pattern_Type_Like, Pattern_Type_Like_IC,
|
||||
Pattern_Type_Regex, Pattern_Type_Regex_IC
|
||||
} Pattern_Type;
|
||||
|
||||
typedef enum
|
||||
{
|
||||
Pattern_Prefix_None, Pattern_Prefix_Partial, Pattern_Prefix_Exact
|
||||
} Pattern_Prefix_Status;
|
||||
|
||||
extern Pattern_Prefix_Status pattern_fixed_prefix(char *patt,
|
||||
Pattern_Type ptype,
|
||||
char **prefix,
|
||||
char **rest);
|
||||
extern bool locale_is_like_safe(void);
|
||||
extern char *make_greater_string(const char *str, Oid datatype);
|
||||
|
||||
/* tid.c */
|
||||
extern Datum tidin(PG_FUNCTION_ARGS);
|
||||
extern Datum tidout(PG_FUNCTION_ARGS);
|
||||
|
|
|
|||
|
|
@ -0,0 +1,77 @@
|
|||
/*-------------------------------------------------------------------------
|
||||
*
|
||||
* selfuncs.h
|
||||
* Selectivity functions and index cost estimation functions for
|
||||
* standard operators and index access methods.
|
||||
*
|
||||
*
|
||||
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $Id: selfuncs.h,v 1.1 2001/06/25 21:11:45 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
#ifndef SELFUNCS_H
|
||||
#define SELFUNCS_H
|
||||
|
||||
#include "fmgr.h"
|
||||
#include "nodes/parsenodes.h"
|
||||
|
||||
|
||||
typedef enum
|
||||
{
|
||||
Pattern_Type_Like, Pattern_Type_Like_IC,
|
||||
Pattern_Type_Regex, Pattern_Type_Regex_IC
|
||||
} Pattern_Type;
|
||||
|
||||
typedef enum
|
||||
{
|
||||
Pattern_Prefix_None, Pattern_Prefix_Partial, Pattern_Prefix_Exact
|
||||
} Pattern_Prefix_Status;
|
||||
|
||||
|
||||
/* selfuncs.c */
|
||||
|
||||
extern Pattern_Prefix_Status pattern_fixed_prefix(char *patt,
|
||||
Pattern_Type ptype,
|
||||
char **prefix,
|
||||
char **rest);
|
||||
extern bool locale_is_like_safe(void);
|
||||
extern char *make_greater_string(const char *str, Oid datatype);
|
||||
|
||||
extern Datum eqsel(PG_FUNCTION_ARGS);
|
||||
extern Datum neqsel(PG_FUNCTION_ARGS);
|
||||
extern Datum scalarltsel(PG_FUNCTION_ARGS);
|
||||
extern Datum scalargtsel(PG_FUNCTION_ARGS);
|
||||
extern Datum regexeqsel(PG_FUNCTION_ARGS);
|
||||
extern Datum icregexeqsel(PG_FUNCTION_ARGS);
|
||||
extern Datum likesel(PG_FUNCTION_ARGS);
|
||||
extern Datum iclikesel(PG_FUNCTION_ARGS);
|
||||
extern Datum regexnesel(PG_FUNCTION_ARGS);
|
||||
extern Datum icregexnesel(PG_FUNCTION_ARGS);
|
||||
extern Datum nlikesel(PG_FUNCTION_ARGS);
|
||||
extern Datum icnlikesel(PG_FUNCTION_ARGS);
|
||||
|
||||
extern Datum eqjoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum neqjoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum scalarltjoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum scalargtjoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum regexeqjoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum icregexeqjoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum likejoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum iclikejoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum regexnejoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum icregexnejoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum nlikejoinsel(PG_FUNCTION_ARGS);
|
||||
extern Datum icnlikejoinsel(PG_FUNCTION_ARGS);
|
||||
|
||||
Selectivity booltestsel(Query *root, BooleanTest *clause, int varRelid);
|
||||
Selectivity nulltestsel(Query *root, NullTest *clause, int varRelid);
|
||||
|
||||
extern Datum btcostestimate(PG_FUNCTION_ARGS);
|
||||
extern Datum rtcostestimate(PG_FUNCTION_ARGS);
|
||||
extern Datum hashcostestimate(PG_FUNCTION_ARGS);
|
||||
extern Datum gistcostestimate(PG_FUNCTION_ARGS);
|
||||
|
||||
#endif /* SELFUNCS_H */
|
||||
Loading…
Reference in New Issue