agavra commented on code in PR #9767:
URL: https://github.com/apache/pinot/pull/9767#discussion_r1018254221
##########
pinot-query-runtime/src/main/java/org/apache/pinot/query/runtime/operator/AggregateOperator.java:
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@@ -53,17 +56,32 @@
* If the input is single value, the output type will be input type.
Otherwise, the output type will be double.
*/
public class AggregateOperator extends BaseOperator<TransferableBlock> {
+
+ interface Merger extends BiFunction<Object, Object, Object> {
+ }
Review Comment:
it used in testing, so it's package private :) I can move it
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