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https://issues.apache.org/jira/browse/SPARK-26847?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16763211#comment-16763211
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Liang-Chi Hsieh commented on SPARK-26847:
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I will finish this once SPARK-26837 is merged.
> Prune nested serializers from object serializers: MapType support
> -----------------------------------------------------------------
>
> Key: SPARK-26847
> URL: https://issues.apache.org/jira/browse/SPARK-26847
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Liang-Chi Hsieh
> Priority: Major
>
> This is TODO PR for SPARK-26837. In SPARK-26837, we prune nested fields from
> object serializers if they are unnecessary in the query execution.
> SPARK-26837 leaves the support of MapType as a TODO item. This ticket is
> created to track it.
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