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Cleanup of OR processing.

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This commit is contained in:
Bruce Momjian
1998-08-03 05:49:24 +00:00
parent 7665e7b0a8
commit b88e9784b6
4 changed files with 144 additions and 147 deletions
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26
src/backend/optimizer/path/indxpath.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.22 1998/08/02 07:10:38 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.23 1998/08/03 05:49:19 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -307,17 +307,23 @@ match_index_orclause(RelOptInfo *rel,
List *other_matching_indices)
{
Node *clause = NULL;
List *matched_indices;
List *matching_indices = other_matching_indices;
List *index_list = NIL;
List *clist;
/* first time through, we create index list */
if (!other_matching_indices)
{
foreach(clist, or_clauses)
matching_indices = lcons(NIL, matching_indices);
}
else matching_indices = other_matching_indices;
index_list = matching_indices;
foreach(clist, or_clauses)
{
clause = lfirst(clist);
if (other_matching_indices)
matched_indices = lfirst(other_matching_indices);
else
matched_indices = NIL;
if (is_opclause(clause) &&
op_class(((Oper *) ((Expr *) clause)->oper)->opno,
@ -333,14 +339,10 @@ match_index_orclause(RelOptInfo *rel,
index) &&
IsA(get_rightop((Expr *) clause), Const))))
{
matched_indices = lcons(index, matched_indices);
lfirst(matching_indices) = lcons(index, lfirst(matching_indices));
}
/* for the first index, we are creating the indexids list */
index_list = lappend(index_list, matched_indices);
if (other_matching_indices)
other_matching_indices = lnext(other_matching_indices);
matching_indices = lnext(matching_indices);
}
return (index_list);