@Override
public Void call() throws Exception {
boolean didRun = false;
try {
acceptSolutions();
if (op.runHashJoin(context, state)) {
didRun = true;
doHashJoin();
}
// Done.
return null;
} finally {
if (didRun) {
/*
* The state needs to be released each time this operator
* runs in order to discard the intermediate solutions
* buffered on the hash index that were just joined against
* the access path. If we do not discard the state after
* processing the intermediate solutions, then they will
* continue to accumulate and we will over-report joins
* (duplicate solutions will be output for things already in
* the hash index the next time we evaluate the hash join
* against the access path).
*/
state.release();
}
sink.close();
if (sink2 != null) sink2.close();
}
}
