andygrove opened a new issue, #4965:
URL: https://github.com/apache/datafusion-comet/issues/4965
Spark 4.2's `UnionCodegenSuite` (SPARK-56482) test "partitioning-aware union
falls back to non-codegen" inspects Spark's `UnionExec` whole-stage-codegen
internals via `executedPlan.collectFirst { case u: UnionExec => u }.get`.
Comet replaces `UnionExec` with `CometUnionExec`, so `collectFirst` returns
`None` and the test fails with `NoSuchElementException: None.get`.
Currently marked `IgnoreComet` in `dev/diffs/4.2.0.diff`
(`WholeStageCodegenSuite` is already `IgnoreCometSuite`).
Part of #4142 (Track Spark 4.2 test failures).
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