gengliangwang commented on code in PR #36506:
URL: https://github.com/apache/spark/pull/36506#discussion_r1040203310
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connector/avro/src/main/scala/org/apache/spark/sql/avro/AvroSerializer.scala:
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@@ -218,6 +218,17 @@ private[sql] class AvroSerializer(
val numFields = st.length
(getter, ordinal) => structConverter(getter.getStruct(ordinal,
numFields))
+ case (st: StructType, UNION) =>
+ val unionConvertor = newComplexUnionConverter(st, avroType,
catalystPath, avroPath)
Review Comment:
This seems different from
https://github.com/apache/spark/blob/master/connector/avro/src/main/scala/org/apache/spark/sql/avro/AvroDeserializer.scala#L296
If only one non-null field in the union, we will create a converter on the
non-null field instead of a complex one.
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