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https://issues.apache.org/jira/browse/SPARK-48481?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun closed SPARK-48481.
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> OptimizeOneRowPlan should not be effective for streaming DataFrame
> ------------------------------------------------------------------
>
> Key: SPARK-48481
> URL: https://issues.apache.org/jira/browse/SPARK-48481
> Project: Spark
> Issue Type: Bug
> Components: Optimizer, Structured Streaming
> Affects Versions: 3.5.2, 3.4.4, 4.0.0
> Reporter: Jungtaek Lim
> Assignee: Jungtaek Lim
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.5.2, 4.0.0
>
>
> This bug is introduce from Apache Spark 3.3.0.
> OptimizeOneRowPlan aggressively rewrites operators or removes operators if
> the rule figures out that the operator has a chance to be optimized with the
> stats that there will be max 1 row in the input.
> This is problematic for streaming, because we aren't seeing the whole data
> but a part of data in the current microbatch and optimizer is not aware of
> this.
> There are various viable approaches to deal with, but maybe fixing the rule
> to disable this effectively with streaming DataFrame would have least effect.
> (There is a separate wider effort to achieve better stability between QO and
> streaming. Since it would take a considerable time, we still need point fixes
> during the time.)
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