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Posted to issues@spark.apache.org by "Tathagata Das (JIRA)" <ji...@apache.org> on 2017/10/18 03:10:00 UTC
[jira] [Resolved] (SPARK-22278) Expose current event time watermark
and current processing time in GroupState
[ https://issues.apache.org/jira/browse/SPARK-22278?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tathagata Das resolved SPARK-22278.
-----------------------------------
Resolution: Fixed
Fix Version/s: (was: 2.2.0)
3.0.0
Issue resolved by pull request 19495
[https://github.com/apache/spark/pull/19495]
> Expose current event time watermark and current processing time in GroupState
> -----------------------------------------------------------------------------
>
> Key: SPARK-22278
> URL: https://issues.apache.org/jira/browse/SPARK-22278
> Project: Spark
> Issue Type: Sub-task
> Components: Structured Streaming
> Affects Versions: 2.2.0
> Reporter: Tathagata Das
> Assignee: Tathagata Das
> Fix For: 3.0.0
>
>
> Complex state-updating and/or timeout-handling logic in mapGroupsWithState functions may require taking decisions based on the current event-time watermark and/or processing-time. Currently, you can use the sql function `current_timestamp` to get the current processing time, but it needs to passed inserted in every row with a select, and then passed through the encoder, which isnt efficient. Furthermore, there is no way to get the current watermark.
> This JIRA is to expose them through the GroupState API.
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