Liang-Chi Hsieh created SPARK-27241:
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Summary: Add map keys support to SelectedField in nested schema
pruning
Key: SPARK-27241
URL: https://issues.apache.org/jira/browse/SPARK-27241
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.0.0
Reporter: Liang-Chi Hsieh
{{SelectedField}} in nested schema pruning doesn't support map keys now. When
map key is complex struct, we should be able to prune unnecessary fields from
keys.
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