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https://issues.apache.org/jira/browse/SPARK-24932?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16561331#comment-16561331
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Saisai Shao commented on SPARK-24932:
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I'm going to remove the target version for this JIRA. Committers will set the
fix version properly when merged.
> Allow update mode for streaming queries with join
> -------------------------------------------------
>
> Key: SPARK-24932
> URL: https://issues.apache.org/jira/browse/SPARK-24932
> Project: Spark
> Issue Type: Improvement
> Components: Structured Streaming
> Affects Versions: 2.3.0, 2.3.1
> Reporter: Eric Fu
> Priority: Major
>
> In issue SPARK-19140 we supported update output mode for non-aggregation
> streaming queries. This should also be applied to streaming join to keep
> semantic consistent.
> PS. Streaming join feature is added after SPARK-19140.
> When using update _output_ mode the join will works exactly as _append_ mode.
> However, for example, this will allow user to run an aggregation-after-join
> query in update mode in order to get a more real-time result output.
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