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From "yuemeng (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (FLINK-7145) Flink SQL API should support multiple parameters for UserDefinedAggFunction
Date Wed, 12 Jul 2017 02:33:00 GMT

     [ https://issues.apache.org/jira/browse/FLINK-7145?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

yuemeng closed FLINK-7145.
--------------------------
    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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