siddharthteotia commented on a change in pull request #5168: Refactor
DistinctQueriesTest to cover more scenarios
URL: https://github.com/apache/incubator-pinot/pull/5168#discussion_r401189152
##########
File path:
pinot-core/src/main/java/org/apache/pinot/core/query/reduce/DistinctDataTableReducer.java
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@@ -108,7 +108,7 @@ public void reduceAndSetResults(String tableName,
DataSchema dataSchema,
if (mergedIntermediateResult == null) {
mergedIntermediateResult = intermediateResultToMerge;
} else {
- _aggregationFunction.merge(mergedIntermediateResult,
intermediateResultToMerge);
+ mergedIntermediateResult =
_aggregationFunction.merge(mergedIntermediateResult, intermediateResultToMerge);
Review comment:
IIUC, this is needed because for the case of empty, it may return a new
object as opposed to merging into existing ones?
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