nizarhejazi commented on code in PR #8927:
URL: https://github.com/apache/pinot/pull/8927#discussion_r921826114
##########
pinot-core/src/main/java/org/apache/pinot/core/query/aggregation/groupby/NoDictionarySingleColumnGroupKeyGenerator.java:
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@@ -72,47 +78,122 @@ public int getGlobalGroupKeyUpperBound() {
@Override
public void generateKeysForBlock(TransformBlock transformBlock, int[]
groupKeys) {
BlockValSet blockValSet =
transformBlock.getBlockValueSet(_groupByExpression);
+ RoaringBitmap nullBitmap = blockValSet.getNullBitmap();
Review Comment:
indeed. Split into 2 helper methods.
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