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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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42
src/backend/optimizer/prep/prepjointree.c
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@@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/prep/prepjointree.c,v 1.2 2003/01/25 23:10:27 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/prep/prepjointree.c,v 1.3 2003/02/08 20:20:55 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -236,7 +236,7 @@ pull_up_subqueries(Query *parse, Node *jtnode, bool below_outer_join)
parse->rowMarks = nconc(parse->rowMarks, subquery->rowMarks);
/*
* We also have to fix the relid lists of any parent InClauseInfo
* We also have to fix the relid sets of any parent InClauseInfo
* nodes. (This could perhaps be done by ResolveNew, but it
* would clutter that routine's API unreasonably.)
*/
@@ -611,10 +611,10 @@ preprocess_jointree(Query *parse, Node *jtnode)
}
/*
* fix_in_clause_relids: update RT-index lists of InClauseInfo nodes
* fix_in_clause_relids: update RT-index sets of InClauseInfo nodes
*
* When we pull up a subquery, any InClauseInfo references to the subquery's
* RT index have to be replaced by the list of substituted relids.
* RT index have to be replaced by the set of substituted relids.
*
* We assume we may modify the InClauseInfo nodes in-place.
*/
@@ -627,26 +627,26 @@ fix_in_clause_relids(List *in_info_list, int varno, Relids subrelids)
{
InClauseInfo *ininfo = (InClauseInfo *) lfirst(l);
if (intMember(varno, ininfo->lefthand))
if (bms_is_member(varno, ininfo->lefthand))
{
ininfo->lefthand = lremovei(varno, ininfo->lefthand);
ininfo->lefthand = nconc(ininfo->lefthand, listCopy(subrelids));
ininfo->lefthand = bms_del_member(ininfo->lefthand, varno);
ininfo->lefthand = bms_add_members(ininfo->lefthand, subrelids);
}
if (intMember(varno, ininfo->righthand))
if (bms_is_member(varno, ininfo->righthand))
{
ininfo->righthand = lremovei(varno, ininfo->righthand);
ininfo->righthand = nconc(ininfo->righthand, listCopy(subrelids));
ininfo->righthand = bms_del_member(ininfo->righthand, varno);
ininfo->righthand = bms_add_members(ininfo->righthand, subrelids);
}
}
}
/*
* get_relids_in_jointree: get list of base RT indexes present in a jointree
* get_relids_in_jointree: get set of base RT indexes present in a jointree
*/
List *
Relids
get_relids_in_jointree(Node *jtnode)
{
Relids result = NIL;
Relids result = NULL;
if (jtnode == NULL)
return result;
@@ -654,21 +654,17 @@ get_relids_in_jointree(Node *jtnode)
{
int varno = ((RangeTblRef *) jtnode)->rtindex;
result = makeListi1(varno);
result = bms_make_singleton(varno);
}
else if (IsA(jtnode, FromExpr))
{
FromExpr *f = (FromExpr *) jtnode;
List *l;
/*
* Note: we assume it's impossible to see same RT index from more
* than one subtree, so nconc() is OK rather than set_unioni().
*/
foreach(l, f->fromlist)
{
result = nconc(result,
get_relids_in_jointree(lfirst(l)));
result = bms_join(result,
get_relids_in_jointree(lfirst(l)));
}
}
else if (IsA(jtnode, JoinExpr))
@@ -677,7 +673,7 @@ get_relids_in_jointree(Node *jtnode)
/* join's own RT index is not wanted in result */
result = get_relids_in_jointree(j->larg);
result = nconc(result, get_relids_in_jointree(j->rarg));
result = bms_join(result, get_relids_in_jointree(j->rarg));
}
else
elog(ERROR, "get_relids_in_jointree: unexpected node type %d",
@@ -686,12 +682,12 @@ get_relids_in_jointree(Node *jtnode)
}
/*
* get_relids_for_join: get list of base RT indexes making up a join
* get_relids_for_join: get set of base RT indexes making up a join
*
* NB: this will not work reliably after preprocess_jointree() is run,
* since that may eliminate join nodes from the jointree.
*/
List *
Relids
get_relids_for_join(Query *parse, int joinrelid)
{
Node *jtnode;