Re: [PR] [SPARK-44856][PYTHON] Improve Python UDTF arrow serializer performance [spark]

["ueshin (via GitHub)" <gi...@apache.org>]

ueshin commented on code in PR #50099:
URL: https://github.com/apache/spark/pull/50099#discussion_r1976207186


##########
python/pyspark/sql/pandas/serializers.py:
##########
@@ -175,6 +178,16 @@ def wrap_and_init_stream():
         return super(ArrowStreamUDFSerializer, self).dump_stream(wrap_and_init_stream(), stream)
 
 
+class ArrowStreamUDTFSerializer(ArrowStreamUDFSerializer):
+    """
+    Same as :class:`ArrowStreamSerializer` but it flattens the struct to Arrow record batch
+    for applying each function with the raw record arrow batch. See also `DataFrame.mapInArrow`.
+    """
+
+    def load_stream(self, stream):
+        return super(ArrowStreamUDFSerializer, self).load_stream(stream)

Review Comment:
   This may be confusing. How about directly call it?
   ```suggestion
           return super(ArrowStreamUDFSerializer, self).load_stream(stream)
           return ArrowStreamSerializer.load_stream(self, stream)
   ```



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