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https://issues.apache.org/jira/browse/IOTDB-945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17465630#comment-17465630
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gongning commented on IOTDB-945:
--------------------------------

这个还是非常期待。

> Support UDAF (User-defined Aggregation Function)
> ------------------------------------------------
>
>                 Key: IOTDB-945
>                 URL: https://issues.apache.org/jira/browse/IOTDB-945
>             Project: Apache IoTDB
>          Issue Type: Sub-task
>          Components: Core/Engine
>            Reporter: Steve Yurong Su
>            Priority: Critical
>
> For example:
> select udaf(a, b), count(a), count(b) from root.sg.d;



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