[jira] [Created] (SPARK-42163) Schema pruning fails on non-foldable array index or map key

["David Cashman (Jira)" <ji...@apache.org>]

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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