[SPARK-48311][SQL] Fix nested pythonUDF in groupBy and aggregate in Binding Exception #50183
+32
−2
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What changes were proposed in this pull request?
While replacing canonicalized python udf in aggregateExpressions we are proposing it to do transformDown instead of transformUp. This will insure that correct canonicalized python udf will used from groupingExpressions.
Why are the changes needed?
This is a bug, because groupingExpressions does transformDown and aggregateExpressions does transformUp which led to add new canonicalized python udfs.
details can be found: https://docs.google.com/document/d/1RXOOCsaFU-E1ZmXJnSrJ2jdRgYQgGAVxDPeFNNaoB1M/edit?usp=sharing
Does this PR introduce any user-facing change?
No
How was this patch tested?
Unit test
Was this patch authored or co-authored using generative AI tooling?
No