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Add the ability to extract OR indexscan conditions from OR-of-AND

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join conditions in which each OR subclause includes a constraint on
the same relation.  This implements the other useful side-effect of
conversion to CNF format, without its unpleasant side-effects.  As
per pghackers discussion of a few weeks ago.
This commit is contained in:
Tom Lane
2004-01-05 05:07:36 +00:00
parent bf488a6842
commit 9091e8d1b2
16 changed files with 438 additions and 295 deletions
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14
src/backend/optimizer/path/joinpath.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/path/joinpath.c,v 1.84 2003/12/30 23:53:14 tgl Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/path/joinpath.c,v 1.85 2004/01/05 05:07:35 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -690,7 +690,7 @@ hash_inner_and_outer(Query *root,
{
RestrictInfo *restrictinfo = (RestrictInfo *) lfirst(i);
if (!restrictinfo->canjoin ||
if (!restrictinfo->can_join ||
restrictinfo->hashjoinoperator == InvalidOid)
continue; /* not hashjoinable */
@ -698,7 +698,7 @@ hash_inner_and_outer(Query *root,
* If processing an outer join, only use its own join clauses for
* hashing. For inner joins we need not be so picky.
*/
if (isouterjoin && restrictinfo->ispusheddown)
if (isouterjoin && restrictinfo->is_pushed_down)
continue;
/*
@ -804,17 +804,17 @@ select_mergejoin_clauses(RelOptInfo *joinrel,
*/
if (isouterjoin)
{
if (restrictinfo->ispusheddown)
if (restrictinfo->is_pushed_down)
continue;
switch (jointype)
{
case JOIN_RIGHT:
if (!restrictinfo->canjoin ||
if (!restrictinfo->can_join ||
restrictinfo->mergejoinoperator == InvalidOid)
return NIL; /* not mergejoinable */
break;
case JOIN_FULL:
if (!restrictinfo->canjoin ||
if (!restrictinfo->can_join ||
restrictinfo->mergejoinoperator == InvalidOid)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
@ -826,7 +826,7 @@ select_mergejoin_clauses(RelOptInfo *joinrel,
}
}
if (!restrictinfo->canjoin ||
if (!restrictinfo->can_join ||
restrictinfo->mergejoinoperator == InvalidOid)
continue; /* not mergejoinable */