sunjincheng created FLINK-10978: ----------------------------------- Summary: Add UnBounded FlatAggregate operator to batch Table API Key: FLINK-10978 URL: https://issues.apache.org/jira/browse/FLINK-10978 Project: Flink Issue Type: Sub-task Components: Table API & SQL Reporter: sunjincheng Fix For: 1.8.0
Add FlatAggregate operator to batch Table API as described in [Google doc|https://docs.google.com/document/d/1tnpxg31EQz2-MEzSotwFzqatsB4rNLz0I-l_vPa5H4Q/edit#heading=h.q23rny2iglsr] . The usage: {code:java} val res = tab .groupBy('a) // leave out groupBy-clause to define global table aggregates .flatAgg(fun: TableAggregateFunction) // output has columns 'a, 'b, 'c .select('a, 'c) {code} -- This message was sent by Atlassian JIRA (v7.6.3#76005)