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Posted to issues@spark.apache.org by "Tathagata Das (JIRA)" <ji...@apache.org> on 2017/01/26 22:36:24 UTC

[jira] [Assigned] (SPARK-19067) mapWithState Style API

     [ https://issues.apache.org/jira/browse/SPARK-19067?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tathagata Das reassigned SPARK-19067:
-------------------------------------

    Assignee: Tathagata Das

> mapWithState Style API
> ----------------------
>
>                 Key: SPARK-19067
>                 URL: https://issues.apache.org/jira/browse/SPARK-19067
>             Project: Spark
>          Issue Type: New Feature
>          Components: Structured Streaming
>            Reporter: Michael Armbrust
>            Assignee: Tathagata Das
>            Priority: Critical
>
> Right now the only way to do stateful operations with with Aggregator or UDAF.  However, this does not give users control of emission or expiration of state making it hard to implement things like sessionization.  We should add a more general construct (probably similar to {{mapWithState}}) to structured streaming.



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