[jira] [Closed] (FLINK-6584) Support multiple consecutive windows in SQL

["Fabian Hueske (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-6584?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Fabian Hueske closed FLINK-6584.
--------------------------------
    Resolution: Implemented

Implemented for 1.4.0 with 2ad8f7eb5690755e2a9e7e93181cd34e1093f23a

> Support multiple consecutive windows in SQL
> -------------------------------------------
>
>                 Key: FLINK-6584
>                 URL: https://issues.apache.org/jira/browse/FLINK-6584
>             Project: Flink
>          Issue Type: New Feature
>          Components: Table API & SQL
>            Reporter: Timo Walther
>            Assignee: Timo Walther
>            Priority: Blocker
>             Fix For: 1.4.0
>
>
> Right now, the Table API supports multiple consecutive windows as follows:
> {code}
> val table = stream.toTable(tEnv, 'rowtime.rowtime, 'int, 'double, 'float, 'bigdec, 'string)
> 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}
> Similar behavior should be supported by the SQL API as well. We need to introduce a new auxiliary group function, but this should happen in sync with Apache Calcite.



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