if (block.isAggregationRequired()) { child = insertGroupbyNode(context, child, stack);
if (block.isAggregationRequired()) { child = insertGroupbyNode(context, child, stack);
if (block.isAggregationRequired()) { child = insertGroupbyNode(context, child, stack);
if (block.isAggregationRequired()) { child = insertGroupbyNode(context, child, stack);