nizarhejazi commented on code in PR #9086:
URL: https://github.com/apache/pinot/pull/9086#discussion_r935075754
##########
pinot-core/src/main/java/org/apache/pinot/core/query/aggregation/function/CountAggregationFunction.java:
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@@ -75,6 +94,20 @@ public void aggregate(int length, AggregationResultHolder
aggregationResultHolde
Map<ExpressionContext, BlockValSet> blockValSetMap) {
if (blockValSetMap.isEmpty()) {
aggregationResultHolder.setValue(aggregationResultHolder.getDoubleResult() +
length);
+ } else if (!blockValSetMap.containsKey(STAR_TREE_COUNT_STAR_EXPRESSION)) {
+ if (!_nullHandlingEnabled) {
Review Comment:
@Jackie-Jiang We have three branches:
1- `blockValSetMap.isEmpty()` for `count(*)`, and no StarTree.
2- `!blockValSetMap.containsKey(STAR_TREE_COUNT_STAR_EXPRESSION)` for
count(columnName), and no StarTree (please see the `!` at the beginning).
Example: `count(bigDecimalColumn)`. Note: we can have count(bigDecimalColumn)
and nullHandling is either enable or not enabled.
3- StarTree.
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