Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/21952#discussion_r207443196
--- Diff:
external/avro/src/main/scala/org/apache/spark/sql/avro/AvroSerializer.scala ---
@@ -100,17 +100,20 @@ class AvroSerializer(rootCatalystType: DataType,
rootAvroType: Schema, nullable:
et, resolveNullableType(avroType.getElementType, containsNull))
(getter, ordinal) => {
val arrayData = getter.getArray(ordinal)
- val result = new java.util.ArrayList[Any]
--- End diff --
can we just `new java.util.ArrayList[Any](len)` here instead of creating an
array and wrap it with array list?
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