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There, now we support GiST...now what? :)

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This commit is contained in:
Marc G. Fournier
1996-08-26 06:32:06 +00:00
parent fe87dbb140
commit a2740a455f
24 changed files with 279 additions and 99 deletions
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42
src/backend/optimizer/plan/createplan.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/createplan.c,v 1.1.1.1 1996/07/09 06:21:37 scrappy Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/createplan.c,v 1.2 1996/08/26 06:31:15 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
@ -316,8 +316,11 @@ create_indexscan_node(IndexPath *best_path,
List *indxqual = NIL;
List *qpqual = NIL;
List *fixed_indxqual = NIL;
List *ixid;
IndexScan *scan_node = (IndexScan*)NULL;
bool lossy = FALSE;
HeapTuple indexTuple;
IndexTupleForm index;
/*
* If an 'or' clause is to be used with this index, the indxqual
@ -340,15 +343,42 @@ create_indexscan_node(IndexPath *best_path,
NIL);
}
/* check and see if any indices are lossy */
foreach (ixid, best_path->indexid) {
indexTuple = SearchSysCacheTuple(INDEXRELID,
ObjectIdGetDatum(lfirsti(ixid)),
0,0,0);
if (!HeapTupleIsValid(indexTuple))
elog(WARN, "create_plan: index %d not found",
lfirsti(ixid));
index = (IndexTupleForm)GETSTRUCT(indexTuple);
if (index->indislossy)
lossy = TRUE;
}
/*
* The qpqual field contains all restrictions except the indxqual.
* The qpqual field contains all restrictions not automatically handled
* by the index. Note that for non-lossy indices, the predicates
* in the indxqual are handled by the index, while for lossy indices
* the indxqual predicates need to be double-checked after the
* index fetches the best-guess tuples.
*/
if(or_clause((Node*)index_clause))
if(or_clause((Node*)index_clause)) {
qpqual = set_difference(scan_clauses,
lcons(index_clause,NIL));
else
if (lossy)
qpqual = nconc(qpqual,
lcons((List *)copyObject(index_clause),NIL));
}
else {
qpqual = set_difference(scan_clauses, lfirst(indxqual));
if (lossy)
qpqual = nconc(qpqual,
(List *)copyObject(lfirst(indxqual)));
}
fixed_indxqual =
(List*)fix_indxqual_references((Node*)indxqual,(Path*)best_path);