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From "Fabian Hueske (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-6697) Add batch multi-window support
Date Tue, 06 Jun 2017 16:22:18 GMT

    [ https://issues.apache.org/jira/browse/FLINK-6697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16039197#comment-16039197
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Fabian Hueske commented on FLINK-6697:
--------------------------------------

I think {{'w.rowtime}} is a good solution to this problem. At least, I couldn't come up with
a better one.
IMO, we should add it for streaming first (incl. the SQL syntax) and fix the batch case once
streaming is fixed.

> Add batch multi-window support
> ------------------------------
>
>                 Key: FLINK-6697
>                 URL: https://issues.apache.org/jira/browse/FLINK-6697
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table API & SQL
>    Affects Versions: 1.3.0
>            Reporter: Timo Walther
>
> Multiple consecutive windows on batch are not tested yet and I think they are also not
supported, because the syntax is not defined for batch yet.
> The following should be supported:
> {code}
> val t = table
>     .window(Tumble over 2.millis on 'rowtime as 'w)
>     .groupBy('w)
>     .select('w.rowtime as 'rowtime, 'int.count as 'int)
>     .window(Tumble over 4.millis on 'rowtime as 'w2)
>     .groupBy('w2)
>     .select('w2.rowtime, 'w2.end, 'int.count)
> {code}



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