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Posted to issues@spark.apache.org by "Hyukjin Kwon (Jira)" <ji...@apache.org> on 2022/07/05 02:48:00 UTC
[jira] [Commented] (SPARK-39585) Multiple Stateful Operators in Structured Streaming
[ https://issues.apache.org/jira/browse/SPARK-39585?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17562317#comment-17562317 ]
Hyukjin Kwon commented on SPARK-39585:
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cc. [~kabhwan] FYI
> Multiple Stateful Operators in Structured Streaming
> ---------------------------------------------------
>
> Key: SPARK-39585
> URL: https://issues.apache.org/jira/browse/SPARK-39585
> Project: Spark
> Issue Type: Improvement
> Components: Structured Streaming
> Affects Versions: 3.3.0
> Reporter: Boyang Jerry Peng
> Priority: Major
>
> Currently, Structured Streaming only supports one stateful operator per pipeline. This constraint excludes Structured Streaming to be used for many use cases such ones involving chained time window aggregations, chained stream-stream outer equality join, stream-stream time interval join followed by time window aggregation. Enabling multiple stateful operators within a pipeline in Structured Streaming will open up many additional use cases for its usage as well as be on par with other stream processing engines.
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