public Enumerator enumerator()
{
PlatformBroker platformBroker = getPlatformBroker();
Optiq.writeSQLPlan( platformBroker.getProperties(), createUniqueName(), getVolcanoPlanner() );
Branch branch = getBranch();
TupleEntryCollector collector = getTupleEntryCollector( platformBroker, branch );
long rowCount;
try