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First cut at full support for OUTER JOINs. There are still a few loose

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ends to clean up (see my message of same date to pghackers), but mostly
it works.  INITDB REQUIRED!
This commit is contained in:
Tom Lane
2000-09-12 21:07:18 +00:00
parent b5c0ab278b
commit ed5003c584
93 changed files with 6386 additions and 4262 deletions
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19
src/backend/optimizer/path/indxpath.c
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@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.94 2000/08/24 03:29:04 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.95 2000/09/12 21:06:53 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1482,7 +1482,9 @@ index_innerjoin(Query *root, RelOptInfo *rel, IndexOptInfo *index,
{
List *clausegroup = lfirst(i);
IndexPath *pathnode = makeNode(IndexPath);
List *indexquals;
List *indexquals = NIL;
bool alljoinquals = true;
List *temp;
/* XXX this code ought to be merged with create_index_path? */
@ -1496,7 +1498,16 @@ index_innerjoin(Query *root, RelOptInfo *rel, IndexOptInfo *index,
*/
pathnode->path.pathkeys = NIL;
indexquals = get_actual_clauses(clausegroup);
/* extract bare indexqual clauses, check whether all from JOIN/ON */
foreach(temp, clausegroup)
{
RestrictInfo *clause = (RestrictInfo *) lfirst(temp);
indexquals = lappend(indexquals, clause->clause);
if (! clause->isjoinqual)
alljoinquals = false;
}
/* expand special operators to indexquals the executor can handle */
indexquals = expand_indexqual_conditions(indexquals);
@ -1514,6 +1525,8 @@ index_innerjoin(Query *root, RelOptInfo *rel, IndexOptInfo *index,
/* joinrelids saves the rels needed on the outer side of the join */
pathnode->joinrelids = lfirst(outerrelids_list);
pathnode->alljoinquals = alljoinquals;
/*
* We must compute the estimated number of output rows for the
* indexscan. This is less than rel->rows because of the