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https://issues.apache.org/jira/browse/SPARK-27288?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16803367#comment-16803367
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Dongjoon Hyun commented on SPARK-27288:
---------------------------------------
[~viirya] and [~maropu]. To give more visibility for the others, I converted
this into SPARK-25603's subtask.
cc [~dbtsai]
> Pruning nested field in complex map key from object serializers
> ---------------------------------------------------------------
>
> Key: SPARK-27288
> URL: https://issues.apache.org/jira/browse/SPARK-27288
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Liang-Chi Hsieh
> Assignee: Liang-Chi Hsieh
> Priority: Major
> Fix For: 3.0.0
>
>
> In SPARK-26847, pruning nested field in complex map key was not supported,
> because some methods in schema pruning did't support it at that moment. Now
> as those methods support it, we can prune nested field in complex map key.
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