Jark Wu created FLINK-22314: ------------------------------- Summary: AggRecordsCombiner should combine buffered records first instead of accumulate on state directly Key: FLINK-22314 URL: https://issues.apache.org/jira/browse/FLINK-22314 Project: Flink Issue Type: Bug Components: Table SQL / Runtime Reporter: Jark Wu
In Window TVF Aggregation, currently, the {{AggRecordsCombiner}} accumulates buffered records on state directly. This is not good for performance. We can accumulate records in memory first, and then merge the accumulator into state, if the aggs support {{merge()}} method. This can reduce lots of state accessing when having {{COUNT DISTINCT}}. -- This message was sent by Atlassian Jira (v8.3.4#803005)