[jira] [Closed] (FLINK-7578) WindowStream should support rich AggregateFunction

["Hequn Cheng (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-7578?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hequn Cheng closed FLINK-7578.
------------------------------
    Resolution: Fixed

fixed by FLINK-7490

> WindowStream should support rich AggregateFunction
> --------------------------------------------------
>
>                 Key: FLINK-7578
>                 URL: https://issues.apache.org/jira/browse/FLINK-7578
>             Project: Flink
>          Issue Type: Improvement
>          Components: DataStream API, Table API & SQL
>            Reporter: Hequn Cheng
>
> Currently, {{WindowedStream}} does not support Rich AggregateFunction which makes users can not use user defined aggregate functions in table-api/sql. Because user code class loader is beyond reach in {{AggregateAggFunction}}.
> As shown in the following example,
> {quote}
> select a,udagg1(b), udagg2(c)
> from Table as T
> GROUP  BY a, TUMBLE(processTime, interval '1' minute);
> {quote}
> Exceptions will be throwed when call {{initFunction()}} in {{AggregateAggFunction}}.
> As user defined aggregations are widely used in table-api/sql, it is valuable to support Rich AggregateFunction for {{WindowStream}}.



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