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