Changeset: 3250f0ff5393 for MonetDB
URL: http://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=3250f0ff5393
Modified Files:
monetdb5/optimizer/opt_pushselect.c
Branch: default
Log Message:
push subslice under projectdelta
diffs (30 lines):
diff --git a/monetdb5/optimizer/opt_pushselect.c
b/monetdb5/optimizer/opt_pushselect.c
--- a/monetdb5/optimizer/opt_pushselect.c
+++ b/monetdb5/optimizer/opt_pushselect.c
@@ -457,6 +457,26 @@ OPTpushselectImplementation(Client cntxt
vars[res] = i;
}
+ /* push subslice under projectdelta */
+ if (isSlice(p) && p->retc == 1) {
+ int var = getArg(p, 1);
+ InstrPtr q = old[vars[var]];
+ if (getModuleId(q) == sqlRef && getFunctionId(q) ==
projectdeltaRef) {
+ InstrPtr r = copyInstruction(p);
+ InstrPtr s = copyInstruction(q);
+
+ /* subslice the candidates */
+ getArg(r, 0) = newTmpVariable(mb,
newBatType(TYPE_oid, TYPE_oid));
+ getArg(r, 1) = getArg(s, 1);
+ pushInstruction(mb,r);
+
+ /* dummy result for the old q, will be removed
by deadcode optimizer */
+ getArg(q, 0) = newTmpVariable(mb,
getArgType(mb, q, 0));
+
+ getArg(s, 1) = getArg(r, 0); /* use result of
subslice */
+ pushInstruction(mb, s);
+ }
+ }
/* c = delta(b, uid, uvl, ins)
* s = subselect(c, C1..)
*
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