@Override public void close() throws Exception { statisticsAggregationOperator.close(); }
@Override public void close() throws Exception { if (source != null) { source.close(); } } }
for (Operator operator : operators) { try { operator.close();
@Override public void close() throws Exception { if (source != null) { source.close(); } } }
for (Operator operator : operators) { try { operator.close();