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Posted to issues@flink.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2017/10/11 09:53:00 UTC
[jira] [Commented] (FLINK-6584) Support multiple consecutive
windows in SQL
[ https://issues.apache.org/jira/browse/FLINK-6584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16200037#comment-16200037 ]
ASF GitHub Bot commented on FLINK-6584:
---------------------------------------
Github user fhueske commented on the issue:
https://github.com/apache/flink/pull/4199
Hi @twalthr, I looked into this PR again. We should add this to the next release to also support window joins on a window aggregated table.
I tried to rebase it on the current master. Unfortunately, this resulted in many conflicts. Can you rebase the PR (or manually port the changes to the current master)?
Thanks, Fabian
> 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
>
> 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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