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https://issues.apache.org/jira/browse/FLINK-7145?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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yuemeng closed FLINK-7145.
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Resolution: Duplicate
> 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
>
> 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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