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Posted to commits@beam.apache.org by "Jingsong Lee (JIRA)" <ji...@apache.org> on 2016/11/06 14:15:58 UTC
[jira] [Updated] (BEAM-912) Trigger can be more flexible
[ https://issues.apache.org/jira/browse/BEAM-912?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jingsong Lee updated BEAM-912:
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Attachment: betweenJoin.png
> Trigger can be more flexible
> ------------------------------
>
> Key: BEAM-912
> URL: https://issues.apache.org/jira/browse/BEAM-912
> Project: Beam
> Issue Type: New Feature
> Components: beam-model
> Reporter: Jingsong Lee
> Assignee: Kenneth Knowles
> Attachments: betweenJoin.png
>
>
> 1.We can support some data-driven trigger, so we need expose data in OnElementContext of onElement method.
> 2.We can support more flexible join, so we need expose buffer tag in TriggerContext, now this buffer tag is in SystemReduceFn.
> for example: SELECT STREAM * FROM Orders AS o JOIN Shipments AS s
> ON o.orderId = s.orderId AND s.rowtime BETWEEN o.rowtime AND o.rowtime + INTERVAL '1' HOUR;
> link: https://issues.apache.org/jira/browse/BEAM-101
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