Stevo Mitric created SPARK-48619:
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Summary: Fix GROUP BY MapType feature
Key: SPARK-48619
URL: https://issues.apache.org/jira/browse/SPARK-48619
Project: Spark
Issue Type: Bug
Components: Spark Core
Affects Versions: 3.4.3
Reporter: Stevo Mitric
There are issues in the current implementation, which causes broken plans to be
produced:
* The InsertMapSortInGroupingExpressions transformation only replaces the
grouping expressions with mapsort, not the aggregate expressions. This causes
broken plans like select c from t group by mapsort(c), where c now becomes a
non-aggregating expression.
* Parent operators referencing the transformed columns are not updated, which
means that we know have broken references.
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