viirya opened a new pull request #24158: [SPARK-26847][SQL] Pruning nested serializers from object serializers: MapType support URL: https://github.com/apache/spark/pull/24158 ## What changes were proposed in this pull request? 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 proposes to support map type. ## How was this patch tested? Added tests.
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