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https://issues.apache.org/jira/browse/SPARK-58589?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18102055#comment-18102055
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Uroš Bojanić commented on SPARK-58589:
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In progress: https://github.com/apache/spark/pull/57792.
> Drop redundant .apply on Function1 encoders in StateTypesEncoderUtils
> ---------------------------------------------------------------------
>
> Key: SPARK-58589
> URL: https://issues.apache.org/jira/browse/SPARK-58589
> Project: Spark
> Issue Type: Improvement
> Components: Structured Streaming
> Affects Versions: 4.3.0
> Reporter: Uroš Bojanić
> Priority: Major
> Labels: pull-request-available
>
> StateTypesEncoderUtils invokes its encoder serializers, deserializers and
> unsafe projections with an explicit .apply(...) at 19 call sites. All of
> these receivers are Function1 subtypes (ExpressionEncoder.Serializer,
> ExpressionEncoder.Deserializer and UnsafeProjection), so f(x) and f.apply(x)
> are identical. The same file already uses the direct call form for several
> projections, so this only removes an inconsistency. No behavior change.
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