61yao commented on code in PR #9676:
URL: https://github.com/apache/pinot/pull/9676#discussion_r1012517384
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pinot-query-runtime/src/main/java/org/apache/pinot/query/runtime/operator/AggregateOperator.java:
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@@ -128,16 +123,12 @@ private TransferableBlock produceAggregatedBlock()
return _upstreamErrorBlock;
}
if (!_isCumulativeBlockConstructed) {
- List<Object[]> rows = new ArrayList<>(_groupByKeyHolder.size());
- for (Map.Entry<Integer, Object[]> e : _groupByKeyHolder.entrySet()) {
- Object[] row = new Object[_aggregationFunctions.length +
_groupSet.size()];
- Object[] keyElements = e.getValue();
- for (int i = 0; i < keyElements.length; i++) {
- row[i] = keyElements[i];
- }
- for (int i = 0; i < _groupByResultHolders.length; i++) {
- row[i + _groupSet.size()] = _groupByResultHolders[i].get(e.getKey());
- }
+ List<Object[]> rows = new ArrayList<>(_groupByResultHolders.size());
+ // Each row is written in the format of [group by keys, aggregate
result1, ...aggregate resultN]
+ for (Map.Entry<Key, Object[]> e : _groupByResultHolders.entrySet()) {
Review Comment:
added a test and PTAL
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