David Cashman created SPARK-42163:
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Summary: Schema pruning fails on non-foldable array index or map
key
Key: SPARK-42163
URL: https://issues.apache.org/jira/browse/SPARK-42163
Project: Spark
Issue Type: Bug
Components: Optimizer
Affects Versions: 3.2.3
Reporter: David Cashman
Schema pruning tries to extract selected fields from struct extractors. It
looks through GetArrayItem/GetMapItem, but when doing so, it ignores the
index/key, which may itself be a struct field. If it is a struct field that is
not otherwise selected, and some other field of the same attribute is selected,
then pruning will drop the field, resulting in an optimizer error.
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