Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/4355#discussion_r135126762
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/runtime/aggregate/GeneratedAggregations.scala
---
@@ -100,6 +108,17 @@ abstract class GeneratedAggregations extends Function {
* aggregated results
*/
def resetAccumulator(accumulators: Row)
+
+ /**
+ * Cleanup for the accumulators.
+ */
+ def cleanup()
+
+ /**
+ * Tear-down method for
[[org.apache.flink.table.functions.AggregateFunction]].
+ * It can be used for clean up work. By default, this method does
nothing.
+ */
+ def close()
--- End diff --
I think `close()` is never called. So we can remove it, right?
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