Extend join-selectivity API (oprjoin interface) so that join type is
passed to join selectivity estimators. Make use of this in eqjoinsel to derive non-bogus selectivity for IN clauses. Further tweaking of cost estimation for IN. initdb forced because of pg_proc.h changes.
This commit is contained in:
Tom Lane
parent
955a1f81a7
commit
2e46b762eb
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@ -1,5 +1,5 @@
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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/Attic/indexcost.sgml,v 2.14 2003/01/14 10:19:02 petere Exp $
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$Header: /cvsroot/pgsql/doc/src/sgml/Attic/indexcost.sgml,v 2.15 2003/01/28 22:13:24 tgl Exp $
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-->
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<chapter id="indexcost">
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@ -205,7 +205,8 @@ amcostestimate (Query *root,
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<programlisting>
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*indexSelectivity = clauselist_selectivity(root, indexQuals,
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lfirsti(rel->relids));
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lfirsti(rel->relids),
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JOIN_INNER);
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</programlisting>
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</para>
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</step>
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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/catalog/pg_operator.c,v 1.77 2002/09/04 20:31:14 momjian Exp $
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* $Header: /cvsroot/pgsql/src/backend/catalog/pg_operator.c,v 1.78 2003/01/28 22:13:25 tgl Exp $
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*
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* NOTES
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* these routines moved here from commands/define.c and somewhat cleaned up.
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@ -485,10 +485,11 @@ OperatorCreate(const char *operatorName,
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typeId[0] = INTERNALOID; /* Query */
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typeId[1] = OIDOID; /* operator OID */
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typeId[2] = INTERNALOID; /* args list */
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typeId[3] = INT2OID; /* jointype */
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joinOid = LookupFuncName(joinName, 3, typeId);
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joinOid = LookupFuncName(joinName, 4, typeId);
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if (!OidIsValid(joinOid))
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func_error("OperatorDef", joinName, 3, typeId, NULL);
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func_error("OperatorDef", joinName, 4, typeId, NULL);
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}
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else
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joinOid = InvalidOid;
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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 1.55 2003/01/15 19:35:39 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/optimizer/path/clausesel.c,v 1.56 2003/01/28 22:13:29 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -65,12 +65,13 @@ static void addRangeClause(RangeQueryClause **rqlist, Node *clause,
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Selectivity
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restrictlist_selectivity(Query *root,
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List *restrictinfo_list,
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int varRelid)
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int varRelid,
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JoinType jointype)
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{
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List *clauselist = get_actual_clauses(restrictinfo_list);
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Selectivity result;
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result = clauselist_selectivity(root, clauselist, varRelid);
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result = clauselist_selectivity(root, clauselist, varRelid, jointype);
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freeList(clauselist);
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return result;
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}
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@ -81,7 +82,7 @@ restrictlist_selectivity(Query *root,
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* expression clauses. The list can be empty, in which case 1.0
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* must be returned.
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*
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* See clause_selectivity() for the meaning of the varRelid parameter.
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* See clause_selectivity() for the meaning of the additional parameters.
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*
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* Our basic approach is to take the product of the selectivities of the
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* subclauses. However, that's only right if the subclauses have independent
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@ -113,7 +114,8 @@ restrictlist_selectivity(Query *root,
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Selectivity
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clauselist_selectivity(Query *root,
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List *clauses,
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int varRelid)
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int varRelid,
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JoinType jointype)
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{
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Selectivity s1 = 1.0;
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RangeQueryClause *rqlist = NULL;
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@ -184,7 +186,7 @@ clauselist_selectivity(Query *root,
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}
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}
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/* Not the right form, so treat it generically. */
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s2 = clause_selectivity(root, clause, varRelid);
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s2 = clause_selectivity(root, clause, varRelid, jointype);
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s1 = s1 * s2;
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}
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@ -362,11 +364,15 @@ addRangeClause(RangeQueryClause **rqlist, Node *clause,
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*
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* When varRelid is 0, all variables are treated as variables. This
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* is appropriate for ordinary join clauses and restriction clauses.
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*
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* jointype is the join type, if the clause is a join clause. Pass JOIN_INNER
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* if the clause isn't a join clause or the context is uncertain.
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*/
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Selectivity
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clause_selectivity(Query *root,
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Node *clause,
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int varRelid)
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int varRelid,
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JoinType jointype)
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{
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Selectivity s1 = 1.0; /* default for any unhandled clause type */
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@ -424,14 +430,16 @@ clause_selectivity(Query *root,
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/* inverse of the selectivity of the underlying clause */
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s1 = 1.0 - clause_selectivity(root,
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(Node *) get_notclausearg((Expr *) clause),
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varRelid);
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varRelid,
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jointype);
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}
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else if (and_clause(clause))
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{
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/* share code with clauselist_selectivity() */
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s1 = clauselist_selectivity(root,
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((BoolExpr *) clause)->args,
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varRelid);
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varRelid,
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jointype);
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}
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else if (or_clause(clause))
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{
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@ -447,7 +455,8 @@ clause_selectivity(Query *root,
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{
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Selectivity s2 = clause_selectivity(root,
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(Node *) lfirst(arg),
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varRelid);
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varRelid,
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jointype);
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s1 = s1 + s2 - s1 * s2;
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}
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@ -479,7 +488,8 @@ clause_selectivity(Query *root,
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{
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/* Estimate selectivity for a join clause. */
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s1 = join_selectivity(root, opno,
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((OpExpr *) clause)->args);
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((OpExpr *) clause)->args,
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jointype);
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}
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else
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{
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@ -519,14 +529,16 @@ clause_selectivity(Query *root,
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s1 = booltestsel(root,
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((BooleanTest *) clause)->booltesttype,
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(Node *) ((BooleanTest *) clause)->arg,
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varRelid);
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varRelid,
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jointype);
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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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s1 = clause_selectivity(root,
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(Node *) ((RelabelType *) clause)->arg,
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varRelid);
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varRelid,
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jointype);
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}
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#ifdef SELECTIVITY_DEBUG
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@ -49,7 +49,7 @@
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/optimizer/path/costsize.c,v 1.103 2003/01/27 20:51:50 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/optimizer/path/costsize.c,v 1.104 2003/01/28 22:13:33 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -104,7 +104,8 @@ bool enable_hashjoin = true;
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static Selectivity estimate_hash_bucketsize(Query *root, Var *var,
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int nbuckets);
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static bool cost_qual_eval_walker(Node *node, QualCost *total);
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static Selectivity approx_selectivity(Query *root, List *quals);
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static Selectivity approx_selectivity(Query *root, List *quals,
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JoinType jointype);
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static void set_rel_width(Query *root, RelOptInfo *rel);
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static double relation_byte_size(double tuples, int width);
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static double page_size(double tuples, int width);
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@ -697,7 +698,8 @@ cost_nestloop(NestPath *path, Query *root)
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*/
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if (path->jointype == JOIN_IN)
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{
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Selectivity qual_selec = approx_selectivity(root, restrictlist);
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Selectivity qual_selec = approx_selectivity(root, restrictlist,
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path->jointype);
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double qptuples;
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qptuples = ceil(qual_selec * outer_path_rows * inner_path_rows);
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@ -816,10 +818,12 @@ cost_mergejoin(MergePath *path, Query *root)
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* Note: it's probably bogus to use the normal selectivity calculation
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* here when either the outer or inner path is a UniquePath.
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*/
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merge_selec = approx_selectivity(root, mergeclauses);
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merge_selec = approx_selectivity(root, mergeclauses,
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path->jpath.jointype);
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cost_qual_eval(&merge_qual_cost, mergeclauses);
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qpquals = set_ptrDifference(restrictlist, mergeclauses);
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qp_selec = approx_selectivity(root, qpquals);
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qp_selec = approx_selectivity(root, qpquals,
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path->jpath.jointype);
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cost_qual_eval(&qp_qual_cost, qpquals);
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freeList(qpquals);
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@ -1044,10 +1048,12 @@ cost_hashjoin(HashPath *path, Query *root)
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* Note: it's probably bogus to use the normal selectivity calculation
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* here when either the outer or inner path is a UniquePath.
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*/
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hash_selec = approx_selectivity(root, hashclauses);
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hash_selec = approx_selectivity(root, hashclauses,
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path->jpath.jointype);
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cost_qual_eval(&hash_qual_cost, hashclauses);
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qpquals = set_ptrDifference(restrictlist, hashclauses);
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qp_selec = approx_selectivity(root, qpquals);
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qp_selec = approx_selectivity(root, qpquals,
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path->jpath.jointype);
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cost_qual_eval(&qp_qual_cost, qpquals);
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freeList(qpquals);
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@ -1084,54 +1090,67 @@ cost_hashjoin(HashPath *path, Query *root)
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* Determine bucketsize fraction for inner relation. We use the
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* smallest bucketsize estimated for any individual hashclause;
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* this is undoubtedly conservative.
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*
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* BUT: if inner relation has been unique-ified, we can assume it's
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* good for hashing. This is important both because it's the right
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* answer, and because we avoid contaminating the cache with a value
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* that's wrong for non-unique-ified paths.
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*/
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innerbucketsize = 1.0;
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foreach(hcl, hashclauses)
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if (IsA(inner_path, UniquePath))
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innerbucketsize = 1.0 / virtualbuckets;
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else
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{
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RestrictInfo *restrictinfo = (RestrictInfo *) lfirst(hcl);
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Selectivity thisbucketsize;
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Assert(IsA(restrictinfo, RestrictInfo));
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/*
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* First we have to figure out which side of the hashjoin clause is the
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* inner side.
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*
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* Since we tend to visit the same clauses over and over when planning
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* a large query, we cache the bucketsize estimate in the RestrictInfo
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* node to avoid repeated lookups of statistics.
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*/
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if (is_subseti(restrictinfo->right_relids, inner_path->parent->relids))
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innerbucketsize = 1.0;
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foreach(hcl, hashclauses)
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{
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/* righthand side is inner */
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thisbucketsize = restrictinfo->right_bucketsize;
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if (thisbucketsize < 0)
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RestrictInfo *restrictinfo = (RestrictInfo *) lfirst(hcl);
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Selectivity thisbucketsize;
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Assert(IsA(restrictinfo, RestrictInfo));
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/*
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* First we have to figure out which side of the hashjoin clause
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* is the inner side.
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*
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* Since we tend to visit the same clauses over and over when
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* planning a large query, we cache the bucketsize estimate in the
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* RestrictInfo node to avoid repeated lookups of statistics.
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*/
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if (is_subseti(restrictinfo->right_relids,
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inner_path->parent->relids))
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{
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/* not cached yet */
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thisbucketsize = estimate_hash_bucketsize(root,
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/* righthand side is inner */
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thisbucketsize = restrictinfo->right_bucketsize;
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if (thisbucketsize < 0)
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{
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/* not cached yet */
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thisbucketsize =
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estimate_hash_bucketsize(root,
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(Var *) get_rightop(restrictinfo->clause),
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virtualbuckets);
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restrictinfo->right_bucketsize = thisbucketsize;
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virtualbuckets);
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restrictinfo->right_bucketsize = thisbucketsize;
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}
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}
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}
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else
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{
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Assert(is_subseti(restrictinfo->left_relids,
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inner_path->parent->relids));
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/* lefthand side is inner */
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thisbucketsize = restrictinfo->left_bucketsize;
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if (thisbucketsize < 0)
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else
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{
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/* not cached yet */
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thisbucketsize = estimate_hash_bucketsize(root,
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Assert(is_subseti(restrictinfo->left_relids,
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inner_path->parent->relids));
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/* lefthand side is inner */
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thisbucketsize = restrictinfo->left_bucketsize;
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if (thisbucketsize < 0)
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{
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/* not cached yet */
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thisbucketsize =
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estimate_hash_bucketsize(root,
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(Var *) get_leftop(restrictinfo->clause),
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virtualbuckets);
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restrictinfo->left_bucketsize = thisbucketsize;
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virtualbuckets);
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restrictinfo->left_bucketsize = thisbucketsize;
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}
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}
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}
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if (innerbucketsize > thisbucketsize)
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innerbucketsize = thisbucketsize;
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if (innerbucketsize > thisbucketsize)
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innerbucketsize = thisbucketsize;
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}
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}
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/*
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@ -1557,7 +1576,7 @@ cost_qual_eval_walker(Node *node, QualCost *total)
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* seems OK to live with the approximation.
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*/
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static Selectivity
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approx_selectivity(Query *root, List *quals)
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approx_selectivity(Query *root, List *quals, JoinType jointype)
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{
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Selectivity total = 1.0;
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List *l;
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|
|
@ -1582,13 +1601,14 @@ approx_selectivity(Query *root, List *quals)
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restrictinfo->this_selec =
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clause_selectivity(root,
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(Node *) restrictinfo->clause,
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0);
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0,
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jointype);
|
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selec = restrictinfo->this_selec;
|
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}
|
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else
|
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{
|
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/* If it's a bare expression, must always do it the hard way */
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selec = clause_selectivity(root, qual, 0);
|
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selec = clause_selectivity(root, qual, 0, jointype);
|
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}
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total *= selec;
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}
|
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|
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@ -1620,7 +1640,8 @@ set_baserel_size_estimates(Query *root, RelOptInfo *rel)
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temp = rel->tuples *
|
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restrictlist_selectivity(root,
|
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rel->baserestrictinfo,
|
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lfirsti(rel->relids));
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lfirsti(rel->relids),
|
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JOIN_INNER);
|
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|
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/*
|
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* Force estimate to be at least one row, to make explain output look
|
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|
|
@ -1682,7 +1703,8 @@ set_joinrel_size_estimates(Query *root, RelOptInfo *rel,
|
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*/
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selec = restrictlist_selectivity(root,
|
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restrictlist,
|
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0);
|
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0,
|
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jointype);
|
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|
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/*
|
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* Basically, we multiply size of Cartesian product by selectivity.
|
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|
|
@ -1694,8 +1716,6 @@ set_joinrel_size_estimates(Query *root, RelOptInfo *rel,
|
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* For JOIN_IN and variants, the Cartesian product is figured with
|
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* respect to a unique-ified input, and then we can clamp to the size
|
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* of the other input.
|
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* XXX it's not at all clear that the ordinary selectivity calculation
|
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* is appropriate in this case.
|
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*/
|
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switch (jointype)
|
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{
|
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|
|
@ -1798,7 +1818,8 @@ set_function_size_estimates(Query *root, RelOptInfo *rel)
|
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temp = rel->tuples *
|
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restrictlist_selectivity(root,
|
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rel->baserestrictinfo,
|
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lfirsti(rel->relids));
|
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lfirsti(rel->relids),
|
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JOIN_INNER);
|
||||
|
||||
/*
|
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* Force estimate to be at least one row, to make explain output look
|
||||
|
|
|
|||
|
|
@ -9,7 +9,7 @@
|
|||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.133 2003/01/24 03:58:34 tgl Exp $
|
||||
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.134 2003/01/28 22:13:33 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -1599,12 +1599,16 @@ make_innerjoin_index_path(Query *root,
|
|||
* selectivity. However, since RestrictInfo nodes aren't copied when
|
||||
* linking them into different lists, it should be sufficient to use
|
||||
* pointer comparison to remove duplicates.)
|
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*
|
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* Always assume the join type is JOIN_INNER; even if some of the
|
||||
* join clauses come from other contexts, that's not our problem.
|
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*/
|
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pathnode->rows = rel->tuples *
|
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restrictlist_selectivity(root,
|
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set_ptrUnion(rel->baserestrictinfo,
|
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clausegroup),
|
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lfirsti(rel->relids));
|
||||
lfirsti(rel->relids),
|
||||
JOIN_INNER);
|
||||
/* Like costsize.c, force estimate to be at least one row */
|
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if (pathnode->rows < 1.0)
|
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pathnode->rows = 1.0;
|
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|
|
|
|||
|
|
@ -7,7 +7,7 @@
|
|||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/subselect.c,v 1.68 2003/01/20 18:54:53 tgl Exp $
|
||||
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/subselect.c,v 1.69 2003/01/28 22:13:35 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -351,7 +351,7 @@ make_subplan(SubLink *slink, List *lefthand, bool isTopQual)
|
|||
|
||||
qualsel = clauselist_selectivity(subquery,
|
||||
plan->qual,
|
||||
0);
|
||||
0, JOIN_INNER);
|
||||
/* Is 10% selectivity a good threshold?? */
|
||||
use_material = qualsel < 0.10;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -9,7 +9,7 @@
|
|||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $Header: /cvsroot/pgsql/src/backend/optimizer/util/plancat.c,v 1.75 2002/11/24 21:52:14 tgl Exp $
|
||||
* $Header: /cvsroot/pgsql/src/backend/optimizer/util/plancat.c,v 1.76 2003/01/28 22:13:35 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -196,8 +196,7 @@ find_secondary_indexes(Oid relationObjectId)
|
|||
* This code executes registered procedures stored in the
|
||||
* operator relation, by calling the function manager.
|
||||
*
|
||||
* varRelid is either 0 or a rangetable index. See clause_selectivity()
|
||||
* for details about its meaning.
|
||||
* See clause_selectivity() for the meaning of the additional parameters.
|
||||
*/
|
||||
Selectivity
|
||||
restriction_selectivity(Query *root,
|
||||
|
|
@ -237,7 +236,8 @@ restriction_selectivity(Query *root,
|
|||
Selectivity
|
||||
join_selectivity(Query *root,
|
||||
Oid operator,
|
||||
List *args)
|
||||
List *args,
|
||||
JoinType jointype)
|
||||
{
|
||||
RegProcedure oprjoin = get_oprjoin(operator);
|
||||
float8 result;
|
||||
|
|
@ -249,10 +249,11 @@ join_selectivity(Query *root,
|
|||
if (!oprjoin)
|
||||
return (Selectivity) 0.5;
|
||||
|
||||
result = DatumGetFloat8(OidFunctionCall3(oprjoin,
|
||||
result = DatumGetFloat8(OidFunctionCall4(oprjoin,
|
||||
PointerGetDatum(root),
|
||||
ObjectIdGetDatum(operator),
|
||||
PointerGetDatum(args)));
|
||||
PointerGetDatum(args),
|
||||
Int16GetDatum(jointype)));
|
||||
|
||||
if (result < 0.0 || result > 1.0)
|
||||
elog(ERROR, "join_selectivity: bad value %f", result);
|
||||
|
|
|
|||
|
|
@ -15,7 +15,7 @@
|
|||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $Header: /cvsroot/pgsql/src/backend/utils/adt/selfuncs.c,v 1.130 2003/01/27 20:51:54 tgl Exp $
|
||||
* $Header: /cvsroot/pgsql/src/backend/utils/adt/selfuncs.c,v 1.131 2003/01/28 22:13:35 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -56,13 +56,18 @@
|
|||
* float8 oprrest (internal, oid, internal, int4);
|
||||
*
|
||||
* The call convention for a join estimator (oprjoin function) is similar
|
||||
* except that varRelid is not needed:
|
||||
* except that varRelid is not needed, and instead the join type is
|
||||
* supplied:
|
||||
*
|
||||
* Selectivity oprjoin (Query *root,
|
||||
* Oid operator,
|
||||
* List *args);
|
||||
* List *args,
|
||||
* JoinType jointype);
|
||||
*
|
||||
* float8 oprjoin (internal, oid, internal);
|
||||
* float8 oprjoin (internal, oid, internal, int2);
|
||||
*
|
||||
* (We deliberately make the SQL signature different to facilitate
|
||||
* catching errors.)
|
||||
*----------
|
||||
*/
|
||||
|
||||
|
|
@ -1009,7 +1014,8 @@ icnlikesel(PG_FUNCTION_ARGS)
|
|||
* booltestsel - Selectivity of BooleanTest Node.
|
||||
*/
|
||||
Selectivity
|
||||
booltestsel(Query *root, BoolTestType booltesttype, Node *arg, int varRelid)
|
||||
booltestsel(Query *root, BoolTestType booltesttype, Node *arg,
|
||||
int varRelid, JoinType jointype)
|
||||
{
|
||||
Var *var;
|
||||
Oid relid;
|
||||
|
|
@ -1047,11 +1053,13 @@ booltestsel(Query *root, BoolTestType booltesttype, Node *arg, int varRelid)
|
|||
break;
|
||||
case IS_TRUE:
|
||||
case IS_NOT_FALSE:
|
||||
selec = (double) clause_selectivity(root, arg, varRelid);
|
||||
selec = (double) clause_selectivity(root, arg,
|
||||
varRelid, jointype);
|
||||
break;
|
||||
case IS_FALSE:
|
||||
case IS_NOT_TRUE:
|
||||
selec = 1.0 - (double) clause_selectivity(root, arg, varRelid);
|
||||
selec = 1.0 - (double) clause_selectivity(root, arg,
|
||||
varRelid, jointype);
|
||||
break;
|
||||
default:
|
||||
elog(ERROR, "booltestsel: unexpected booltesttype %d",
|
||||
|
|
@ -1321,6 +1329,7 @@ eqjoinsel(PG_FUNCTION_ARGS)
|
|||
Query *root = (Query *) PG_GETARG_POINTER(0);
|
||||
Oid operator = PG_GETARG_OID(1);
|
||||
List *args = (List *) PG_GETARG_POINTER(2);
|
||||
JoinType jointype = (JoinType) PG_GETARG_INT16(3);
|
||||
Var *var1;
|
||||
Var *var2;
|
||||
double selec;
|
||||
|
|
@ -1421,6 +1430,8 @@ eqjoinsel(PG_FUNCTION_ARGS)
|
|||
FmgrInfo eqproc;
|
||||
bool *hasmatch1;
|
||||
bool *hasmatch2;
|
||||
double nullfrac1 = stats1->stanullfrac;
|
||||
double nullfrac2 = stats2->stanullfrac;
|
||||
double matchprodfreq,
|
||||
matchfreq1,
|
||||
matchfreq2,
|
||||
|
|
@ -1434,10 +1445,36 @@ eqjoinsel(PG_FUNCTION_ARGS)
|
|||
nmatches;
|
||||
|
||||
fmgr_info(get_opcode(operator), &eqproc);
|
||||
hasmatch1 = (bool *) palloc(nvalues1 * sizeof(bool));
|
||||
memset(hasmatch1, 0, nvalues1 * sizeof(bool));
|
||||
hasmatch2 = (bool *) palloc(nvalues2 * sizeof(bool));
|
||||
memset(hasmatch2, 0, nvalues2 * sizeof(bool));
|
||||
hasmatch1 = (bool *) palloc0(nvalues1 * sizeof(bool));
|
||||
hasmatch2 = (bool *) palloc0(nvalues2 * sizeof(bool));
|
||||
|
||||
/*
|
||||
* If we are doing any variant of JOIN_IN, pretend all the values
|
||||
* of the righthand relation are unique (ie, act as if it's been
|
||||
* DISTINCT'd).
|
||||
*
|
||||
* NOTE: it might seem that we should unique-ify the lefthand
|
||||
* input when considering JOIN_REVERSE_IN. But this is not so,
|
||||
* because the join clause we've been handed has not been
|
||||
* commuted from the way the parser originally wrote it. We know
|
||||
* that the unique side of the IN clause is *always* on the right.
|
||||
*
|
||||
* NOTE: it would be dangerous to try to be smart about JOIN_LEFT
|
||||
* or JOIN_RIGHT here, because we do not have enough information
|
||||
* to determine which var is really on which side of the join.
|
||||
* Perhaps someday we should pass in more information.
|
||||
*/
|
||||
if (jointype == JOIN_IN ||
|
||||
jointype == JOIN_REVERSE_IN ||
|
||||
jointype == JOIN_UNIQUE_INNER ||
|
||||
jointype == JOIN_UNIQUE_OUTER)
|
||||
{
|
||||
float4 oneovern = 1.0 / nd2;
|
||||
|
||||
for (i = 0; i < nvalues2; i++)
|
||||
numbers2[i] = oneovern;
|
||||
nullfrac2 = oneovern;
|
||||
}
|
||||
|
||||
/*
|
||||
* Note we assume that each MCV will match at most one member
|
||||
|
|
@ -1496,8 +1533,8 @@ eqjoinsel(PG_FUNCTION_ARGS)
|
|||
* Compute total frequency of non-null values that are not in
|
||||
* the MCV lists.
|
||||
*/
|
||||
otherfreq1 = 1.0 - stats1->stanullfrac - matchfreq1 - unmatchfreq1;
|
||||
otherfreq2 = 1.0 - stats2->stanullfrac - matchfreq2 - unmatchfreq2;
|
||||
otherfreq1 = 1.0 - nullfrac1 - matchfreq1 - unmatchfreq1;
|
||||
otherfreq2 = 1.0 - nullfrac2 - matchfreq2 - unmatchfreq2;
|
||||
CLAMP_PROBABILITY(otherfreq1);
|
||||
CLAMP_PROBABILITY(otherfreq2);
|
||||
|
||||
|
|
@ -1585,6 +1622,7 @@ neqjoinsel(PG_FUNCTION_ARGS)
|
|||
Query *root = (Query *) PG_GETARG_POINTER(0);
|
||||
Oid operator = PG_GETARG_OID(1);
|
||||
List *args = (List *) PG_GETARG_POINTER(2);
|
||||
JoinType jointype = (JoinType) PG_GETARG_INT16(3);
|
||||
Oid eqop;
|
||||
float8 result;
|
||||
|
||||
|
|
@ -1595,11 +1633,11 @@ neqjoinsel(PG_FUNCTION_ARGS)
|
|||
eqop = get_negator(operator);
|
||||
if (eqop)
|
||||
{
|
||||
result = DatumGetFloat8(DirectFunctionCall3(eqjoinsel,
|
||||
result = DatumGetFloat8(DirectFunctionCall4(eqjoinsel,
|
||||
PointerGetDatum(root),
|
||||
ObjectIdGetDatum(eqop),
|
||||
PointerGetDatum(args)));
|
||||
|
||||
ObjectIdGetDatum(eqop),
|
||||
PointerGetDatum(args),
|
||||
Int16GetDatum(jointype)));
|
||||
}
|
||||
else
|
||||
{
|
||||
|
|
@ -3784,7 +3822,8 @@ genericcostestimate(Query *root, RelOptInfo *rel,
|
|||
|
||||
/* Estimate the fraction of main-table tuples that will be visited */
|
||||
*indexSelectivity = clauselist_selectivity(root, selectivityQuals,
|
||||
lfirsti(rel->relids));
|
||||
lfirsti(rel->relids),
|
||||
JOIN_INNER);
|
||||
|
||||
/*
|
||||
* Estimate the number of tuples that will be visited. We do it in
|
||||
|
|
|
|||
|
|
@ -37,7 +37,7 @@
|
|||
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $Id: catversion.h,v 1.173 2003/01/23 23:39:04 petere Exp $
|
||||
* $Id: catversion.h,v 1.174 2003/01/28 22:13:36 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -53,6 +53,6 @@
|
|||
*/
|
||||
|
||||
/* yyyymmddN */
|
||||
#define CATALOG_VERSION_NO 200301241
|
||||
#define CATALOG_VERSION_NO 200301281
|
||||
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -7,7 +7,7 @@
|
|||
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $Id: pg_proc.h,v 1.281 2003/01/09 00:58:41 tgl Exp $
|
||||
* $Id: pg_proc.h,v 1.282 2003/01/28 22:13:36 tgl Exp $
|
||||
*
|
||||
* NOTES
|
||||
* The script catalog/genbki.sh reads this file and generates .bki
|
||||
|
|
@ -218,13 +218,13 @@ DATA(insert OID = 103 ( scalarltsel PGNSP PGUID 12 f f t f s 4 701 "2281 26
|
|||
DESCR("restriction selectivity of < and related operators on scalar datatypes");
|
||||
DATA(insert OID = 104 ( scalargtsel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 23" scalargtsel - _null_ ));
|
||||
DESCR("restriction selectivity of > and related operators on scalar datatypes");
|
||||
DATA(insert OID = 105 ( eqjoinsel PGNSP PGUID 12 f f t f s 3 701 "2281 26 2281" eqjoinsel - _null_ ));
|
||||
DATA(insert OID = 105 ( eqjoinsel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 21" eqjoinsel - _null_ ));
|
||||
DESCR("join selectivity of = and related operators");
|
||||
DATA(insert OID = 106 ( neqjoinsel PGNSP PGUID 12 f f t f s 3 701 "2281 26 2281" neqjoinsel - _null_ ));
|
||||
DATA(insert OID = 106 ( neqjoinsel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 21" neqjoinsel - _null_ ));
|
||||
DESCR("join selectivity of <> and related operators");
|
||||
DATA(insert OID = 107 ( scalarltjoinsel PGNSP PGUID 12 f f t f s 3 701 "2281 26 2281" scalarltjoinsel - _null_ ));
|
||||
DATA(insert OID = 107 ( scalarltjoinsel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 21" scalarltjoinsel - _null_ ));
|
||||
DESCR("join selectivity of < and related operators on scalar datatypes");
|
||||
DATA(insert OID = 108 ( scalargtjoinsel PGNSP PGUID 12 f f t f s 3 701 "2281 26 2281" scalargtjoinsel - _null_ ));
|
||||
DATA(insert OID = 108 ( scalargtjoinsel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 21" scalargtjoinsel - _null_ ));
|
||||
DESCR("join selectivity of > and related operators on scalar datatypes");
|
||||
|
||||
DATA(insert OID = 109 ( unknownin PGNSP PGUID 12 f f t f i 1 705 "2275" unknownin - _null_ ));
|
||||
|
|
@ -290,7 +290,7 @@ DATA(insert OID = 138 ( box_center PGNSP PGUID 12 f f t f i 1 600 "603" bo
|
|||
DESCR("center of");
|
||||
DATA(insert OID = 139 ( areasel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 23" areasel - _null_ ));
|
||||
DESCR("restriction selectivity for area-comparison operators");
|
||||
DATA(insert OID = 140 ( areajoinsel PGNSP PGUID 12 f f t f s 3 701 "2281 26 2281" areajoinsel - _null_ ));
|
||||
DATA(insert OID = 140 ( areajoinsel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 21" areajoinsel - _null_ ));
|
||||
DESCR("join selectivity for area-comparison operators");
|
||||
DATA(insert OID = 141 ( int4mul PGNSP PGUID 12 f f t f i 2 23 "23 23" int4mul - _null_ ));
|
||||
DESCR("multiply");
|
||||
|
|
@ -1590,11 +1590,11 @@ DESCR("current transaction time");
|
|||
|
||||
DATA(insert OID = 1300 ( positionsel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 23" positionsel - _null_ ));
|
||||
DESCR("restriction selectivity for position-comparison operators");
|
||||
DATA(insert OID = 1301 ( positionjoinsel PGNSP PGUID 12 f f t f s 3 701 "2281 26 2281" positionjoinsel - _null_ ));
|
||||
DATA(insert OID = 1301 ( positionjoinsel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 21" positionjoinsel - _null_ ));
|
||||
DESCR("join selectivity for position-comparison operators");
|
||||
DATA(insert OID = 1302 ( contsel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 23" contsel - _null_ ));
|
||||
DESCR("restriction selectivity for containment comparison operators");
|
||||
DATA(insert OID = 1303 ( contjoinsel PGNSP PGUID 12 f f t f s 3 701 "2281 26 2281" contjoinsel - _null_ ));
|
||||
DATA(insert OID = 1303 ( contjoinsel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 21" contjoinsel - _null_ ));
|
||||
DESCR("join selectivity for containment comparison operators");
|
||||
|
||||
DATA(insert OID = 1304 ( overlaps PGNSP PGUID 12 f f f f i 4 16 "1184 1184 1184 1184" overlaps_timestamp - _null_ ));
|
||||
|
|
@ -2545,9 +2545,9 @@ DATA(insert OID = 1814 ( iclikesel PGNSP PGUID 12 f f t f s 4 701 "2281 26 228
|
|||
DESCR("restriction selectivity of ILIKE");
|
||||
DATA(insert OID = 1815 ( icnlikesel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 23" icnlikesel - _null_ ));
|
||||
DESCR("restriction selectivity of NOT ILIKE");
|
||||
DATA(insert OID = 1816 ( iclikejoinsel PGNSP PGUID 12 f f t f s 3 701 "2281 26 2281" iclikejoinsel - _null_ ));
|
||||
DATA(insert OID = 1816 ( iclikejoinsel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 21" iclikejoinsel - _null_ ));
|
||||
DESCR("join selectivity of ILIKE");
|
||||
DATA(insert OID = 1817 ( icnlikejoinsel PGNSP PGUID 12 f f t f s 3 701 "2281 26 2281" icnlikejoinsel - _null_ ));
|
||||
DATA(insert OID = 1817 ( icnlikejoinsel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 21" icnlikejoinsel - _null_ ));
|
||||
DESCR("join selectivity of NOT ILIKE");
|
||||
DATA(insert OID = 1818 ( regexeqsel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 23" regexeqsel - _null_ ));
|
||||
DESCR("restriction selectivity of regex match");
|
||||
|
|
@ -2561,17 +2561,17 @@ DATA(insert OID = 1822 ( nlikesel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281
|
|||
DESCR("restriction selectivity of NOT LIKE");
|
||||
DATA(insert OID = 1823 ( icregexnesel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 23" icregexnesel - _null_ ));
|
||||
DESCR("restriction selectivity of case-insensitive regex non-match");
|
||||
DATA(insert OID = 1824 ( regexeqjoinsel PGNSP PGUID 12 f f t f s 3 701 "2281 26 2281" regexeqjoinsel - _null_ ));
|
||||
DATA(insert OID = 1824 ( regexeqjoinsel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 21" regexeqjoinsel - _null_ ));
|
||||
DESCR("join selectivity of regex match");
|
||||
DATA(insert OID = 1825 ( likejoinsel PGNSP PGUID 12 f f t f s 3 701 "2281 26 2281" likejoinsel - _null_ ));
|
||||
DATA(insert OID = 1825 ( likejoinsel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 21" likejoinsel - _null_ ));
|
||||
DESCR("join selectivity of LIKE");
|
||||
DATA(insert OID = 1826 ( icregexeqjoinsel PGNSP PGUID 12 f f t f s 3 701 "2281 26 2281" icregexeqjoinsel - _null_ ));
|
||||
DATA(insert OID = 1826 ( icregexeqjoinsel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 21" icregexeqjoinsel - _null_ ));
|
||||
DESCR("join selectivity of case-insensitive regex match");
|
||||
DATA(insert OID = 1827 ( regexnejoinsel PGNSP PGUID 12 f f t f s 3 701 "2281 26 2281" regexnejoinsel - _null_ ));
|
||||
DATA(insert OID = 1827 ( regexnejoinsel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 21" regexnejoinsel - _null_ ));
|
||||
DESCR("join selectivity of regex non-match");
|
||||
DATA(insert OID = 1828 ( nlikejoinsel PGNSP PGUID 12 f f t f s 3 701 "2281 26 2281" nlikejoinsel - _null_ ));
|
||||
DATA(insert OID = 1828 ( nlikejoinsel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 21" nlikejoinsel - _null_ ));
|
||||
DESCR("join selectivity of NOT LIKE");
|
||||
DATA(insert OID = 1829 ( icregexnejoinsel PGNSP PGUID 12 f f t f s 3 701 "2281 26 2281" icregexnejoinsel - _null_ ));
|
||||
DATA(insert OID = 1829 ( icregexnejoinsel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 21" icregexnejoinsel - _null_ ));
|
||||
DESCR("join selectivity of case-insensitive regex non-match");
|
||||
|
||||
/* Aggregate-related functions */
|
||||
|
|
|
|||
|
|
@ -7,7 +7,7 @@
|
|||
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $Id: cost.h,v 1.51 2003/01/27 20:51:54 tgl Exp $
|
||||
* $Id: cost.h,v 1.52 2003/01/28 22:13:41 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -88,13 +88,16 @@ extern void set_function_size_estimates(Query *root, RelOptInfo *rel);
|
|||
* routines to compute clause selectivities
|
||||
*/
|
||||
extern Selectivity restrictlist_selectivity(Query *root,
|
||||
List *restrictinfo_list,
|
||||
int varRelid);
|
||||
List *restrictinfo_list,
|
||||
int varRelid,
|
||||
JoinType jointype);
|
||||
extern Selectivity clauselist_selectivity(Query *root,
|
||||
List *clauses,
|
||||
int varRelid);
|
||||
List *clauses,
|
||||
int varRelid,
|
||||
JoinType jointype);
|
||||
extern Selectivity clause_selectivity(Query *root,
|
||||
Node *clause,
|
||||
int varRelid);
|
||||
Node *clause,
|
||||
int varRelid,
|
||||
JoinType jointype);
|
||||
|
||||
#endif /* COST_H */
|
||||
|
|
|
|||
|
|
@ -7,7 +7,7 @@
|
|||
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $Id: plancat.h,v 1.27 2002/06/20 20:29:51 momjian Exp $
|
||||
* $Id: plancat.h,v 1.28 2003/01/28 22:13:41 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -34,7 +34,8 @@ extern Selectivity restriction_selectivity(Query *root,
|
|||
int varRelid);
|
||||
|
||||
extern Selectivity join_selectivity(Query *root,
|
||||
Oid operator,
|
||||
List *args);
|
||||
Oid operator,
|
||||
List *args,
|
||||
JoinType jointype);
|
||||
|
||||
#endif /* PLANCAT_H */
|
||||
|
|
|
|||
|
|
@ -8,7 +8,7 @@
|
|||
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $Id: selfuncs.h,v 1.11 2003/01/20 18:55:07 tgl Exp $
|
||||
* $Id: selfuncs.h,v 1.12 2003/01/28 22:13:41 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -67,7 +67,7 @@ extern Datum nlikejoinsel(PG_FUNCTION_ARGS);
|
|||
extern Datum icnlikejoinsel(PG_FUNCTION_ARGS);
|
||||
|
||||
extern Selectivity booltestsel(Query *root, BoolTestType booltesttype,
|
||||
Node *arg, int varRelid);
|
||||
Node *arg, int varRelid, JoinType jointype);
|
||||
extern Selectivity nulltestsel(Query *root, NullTestType nulltesttype,
|
||||
Node *arg, int varRelid);
|
||||
|
||||
|
|
|
|||
|
|
@ -530,16 +530,17 @@ WHERE p1.oprrest = p2.oid AND
|
|||
-- If oprjoin is set, the operator must be a binary boolean op,
|
||||
-- and it must link to a proc with the right signature
|
||||
-- to be a join selectivity estimator.
|
||||
-- The proc signature we want is: float8 proc(internal, oid, internal)
|
||||
-- The proc signature we want is: float8 proc(internal, oid, internal, int2)
|
||||
SELECT p1.oid, p1.oprname, p2.oid, p2.proname
|
||||
FROM pg_operator AS p1, pg_proc AS p2
|
||||
WHERE p1.oprjoin = p2.oid AND
|
||||
(p1.oprkind != 'b' OR p1.oprresult != 'bool'::regtype OR
|
||||
p2.prorettype != 'float8'::regtype OR p2.proretset OR
|
||||
p2.pronargs != 3 OR
|
||||
p2.pronargs != 4 OR
|
||||
p2.proargtypes[0] != 'internal'::regtype OR
|
||||
p2.proargtypes[1] != 'oid'::regtype OR
|
||||
p2.proargtypes[2] != 'internal'::regtype);
|
||||
p2.proargtypes[2] != 'internal'::regtype OR
|
||||
p2.proargtypes[3] != 'int2'::regtype);
|
||||
oid | oprname | oid | proname
|
||||
-----+---------+-----+---------
|
||||
(0 rows)
|
||||
|
|
|
|||
|
|
@ -134,10 +134,10 @@ SELECT '' AS five, f1 AS "Correlated Field"
|
|||
WHERE f3 IS NOT NULL);
|
||||
five | Correlated Field
|
||||
------+------------------
|
||||
| 1
|
||||
| 2
|
||||
| 2
|
||||
| 3
|
||||
| 1
|
||||
| 2
|
||||
| 3
|
||||
(5 rows)
|
||||
|
||||
|
|
|
|||
|
|
@ -444,17 +444,18 @@ WHERE p1.oprrest = p2.oid AND
|
|||
-- If oprjoin is set, the operator must be a binary boolean op,
|
||||
-- and it must link to a proc with the right signature
|
||||
-- to be a join selectivity estimator.
|
||||
-- The proc signature we want is: float8 proc(internal, oid, internal)
|
||||
-- The proc signature we want is: float8 proc(internal, oid, internal, int2)
|
||||
|
||||
SELECT p1.oid, p1.oprname, p2.oid, p2.proname
|
||||
FROM pg_operator AS p1, pg_proc AS p2
|
||||
WHERE p1.oprjoin = p2.oid AND
|
||||
(p1.oprkind != 'b' OR p1.oprresult != 'bool'::regtype OR
|
||||
p2.prorettype != 'float8'::regtype OR p2.proretset OR
|
||||
p2.pronargs != 3 OR
|
||||
p2.pronargs != 4 OR
|
||||
p2.proargtypes[0] != 'internal'::regtype OR
|
||||
p2.proargtypes[1] != 'oid'::regtype OR
|
||||
p2.proargtypes[2] != 'internal'::regtype);
|
||||
p2.proargtypes[2] != 'internal'::regtype OR
|
||||
p2.proargtypes[3] != 'int2'::regtype);
|
||||
|
||||
-- **************** pg_aggregate ****************
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue