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Replace planner's representation of relation sets, per pghackers discussion.

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Instead of Lists of integers, we now store variable-length bitmap sets.
This should be faster as well as less error-prone.
This commit is contained in:
Tom Lane
2003-02-08 20:20:55 +00:00
parent 893678eda7
commit c15a4c2aef
35 changed files with 1453 additions and 626 deletions
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8
src/backend/optimizer/plan/subselect.c
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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 1.69 2003/01/28 22:13:35 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/subselect.c,v 1.70 2003/02/08 20:20:54 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -607,7 +607,7 @@ Node *
convert_IN_to_join(Query *parse, SubLink *sublink)
{
Query *subselect = (Query *) sublink->subselect;
List *left_varnos;
Relids left_varnos;
int rtindex;
RangeTblEntry *rte;
RangeTblRef *rtr;
@@ -635,7 +635,7 @@ convert_IN_to_join(Query *parse, SubLink *sublink)
* query, else it's not gonna be a join.
*/
left_varnos = pull_varnos((Node *) sublink->lefthand);
if (left_varnos == NIL)
if (bms_is_empty(left_varnos))
return NULL;
/*
* The left-hand expressions mustn't be volatile. (Perhaps we should
@@ -666,7 +666,7 @@ convert_IN_to_join(Query *parse, SubLink *sublink)
*/
ininfo = makeNode(InClauseInfo);
ininfo->lefthand = left_varnos;
ininfo->righthand = makeListi1(rtindex);
ininfo->righthand = bms_make_singleton(rtindex);
parse->in_info_list = lcons(ininfo, parse->in_info_list);
/*
* Build the result qual expressions. As a side effect,