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Posted to issues@flink.apache.org by "yuemeng (JIRA)" <ji...@apache.org> on 2017/07/11 07:50:00 UTC

[jira] [Created] (FLINK-7145) Flink SQL API should support multiple parameters for UserDefinedAggFunction

yuemeng created FLINK-7145:
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             Summary: Flink SQL API should support multiple parameters for UserDefinedAggFunction
                 Key: FLINK-7145
                 URL: https://issues.apache.org/jira/browse/FLINK-7145
             Project: Flink
          Issue Type: New Feature
          Components: Table API & SQL
            Reporter: yuemeng
            Priority: Critical


UDAF such as topK and some other udaf with bloom filter need more than one parameters ,we should make flink sql support this.
base on flink sql support DML and multiple parameters udaf,we can execute sql like:
{code}
CREATE TEMPORARY function 'TOPK' AS 'com.xxxx.aggregate.udaf.distinctUdaf.topk.ITopKUDAF';
INSERT INTO db_sink SELECT id, TOPK(price, 5, 'DESC') FROM kafka_source GROUP BY id;
{code}



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