BryanCutler commented on a change in pull request #23900: [SPARK-23836][PYTHON]
Add support for StructType return in Scalar Pandas UDF
URL: https://github.com/apache/spark/pull/23900#discussion_r262351548
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File path: python/pyspark/sql/udf.py
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@@ -133,6 +133,8 @@ def returnType(self):
"UDFs: returnType must be a StructType.")
elif self.evalType == PythonEvalType.SQL_GROUPED_AGG_PANDAS_UDF:
try:
+ if isinstance(self._returnType_placeholder, StructType):
+ raise TypeError
Review comment:
Sure. I will try it as a followup, but a message for now will be good. I
just noticed that grouped map wasn't catching a nested struct type, so I need
to fix that anyway.
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