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Further work on planning of indexscans. Cleaned up interfaces
to index_selectivity so that it can be handed an indexqual clause list rather than a bunch of assorted derivative data.
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@ -7,7 +7,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/optimizer/path/orindxpath.c,v 1.29 1999/07/24 23:21:10 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/optimizer/path/orindxpath.c,v 1.30 1999/07/25 23:07:24 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -121,11 +121,14 @@ create_or_index_paths(Query *root,
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pathnode->indexqual = NIL;
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foreach(orclause, clausenode->clause->args)
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{
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List *sublist;
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if (and_clause(lfirst(orclause)))
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sublist = ((Expr *) lfirst(orclause))->args;
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Expr *subclause = (Expr *) lfirst(orclause);
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List *sublist;
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if (and_clause((Node *) subclause))
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sublist = subclause->args;
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else
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sublist = lcons(lfirst(orclause), NIL);
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sublist = lcons(subclause, NIL);
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/* expansion call... */
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pathnode->indexqual = lappend(pathnode->indexqual,
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sublist);
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}
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@ -224,18 +227,8 @@ best_or_subclause_index(Query *root,
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Cost *retCost, /* return value */
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Cost *retSelec) /* return value */
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{
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Oid relid = getrelid(lfirsti(rel->relids),
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root->rtable);
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Oid opno = ((Oper *) subclause->oper)->opno;
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AttrNumber attno = (get_leftop(subclause))->varattno;
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bool constant_on_right = non_null((Expr *) get_rightop(subclause));
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Datum value;
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int flag;
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List *opnos,
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*attnos,
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*values,
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*flags;
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bool first_run = true;
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List *indexquals;
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List *ilist;
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/* if we don't match anything, return zeros */
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@ -243,37 +236,25 @@ best_or_subclause_index(Query *root,
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*retCost = (Cost) 0.0;
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*retSelec = (Cost) 0.0;
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if (constant_on_right) /* XXX looks pretty bogus ... tgl */
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value = ((Const *) get_rightop(subclause))->constvalue;
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/* convert 'or' subclause to an indexqual list */
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if (and_clause((Node *) subclause))
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indexquals = subclause->args;
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else
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value = NameGetDatum("");
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if (constant_on_right)
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flag = (_SELEC_IS_CONSTANT_ || _SELEC_CONSTANT_RIGHT_);
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else
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flag = _SELEC_CONSTANT_RIGHT_;
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/* prebuild lists since we will pass same list to each index */
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opnos = lconsi(opno, NIL);
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attnos = lconsi(attno, NIL);
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values = lconsi(value, NIL);
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flags = lconsi(flag, NIL);
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indexquals = lcons(subclause, NIL);
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/* expansion call... */
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foreach(ilist, indices)
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{
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RelOptInfo *index = (RelOptInfo *) lfirst(ilist);
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Oid indexid = (Oid) lfirsti(index->relids);
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Cost subcost;
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float npages,
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selec;
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float npages;
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float selec;
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index_selectivity(indexid,
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index->classlist,
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opnos,
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relid,
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attnos,
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values,
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flags,
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1,
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index_selectivity(root,
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lfirsti(rel->relids),
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indexid,
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indexquals,
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&npages,
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&selec);
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