// handle clash with already staged entries
case LeftTuple.INSERT:
stagedRightTuples.removeInsert( rightTuple );
break;
case LeftTuple.UPDATE:
stagedRightTuples.removeUpdate( rightTuple );
break;
}
if ( memory.getAndDecCounter() == 1 && isEmptyBetaConstraints() ) {
// NotNodes can only be unlinked, if they have no variable constraints