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https://issues.apache.org/jira/browse/FLINK-7145?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16082023#comment-16082023
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Fabian Hueske commented on FLINK-7145:
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[~Xiaojun Jin], I can execute the query with a multi-argument UDAGG I posted
above in Flink.
So this doesn't seem to be an issue with Flink. Maybe we worked around
Calcite's limitation.
If this is not working for you, please post a concrete query such that we can
reproduce the issue.
Thanks, Fabian
> 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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