viirya commented on a change in pull request #24682: [SPARK-27762][SQL]
[FOLLOWUP] Add behavior change for Avro writer in migration guide
URL: https://github.com/apache/spark/pull/24682#discussion_r286774235
##########
File path:
external/avro/src/test/scala/org/apache/spark/sql/avro/AvroSuite.scala
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@@ -930,6 +930,33 @@ class AvroSuite extends QueryTest with SharedSQLContext
with SQLTestUtils {
}
}
+ test("support user provided non-nullable avro schema " +
+ "for nullable catalyst schema without any null record") {
Review comment:
Sounds good to have warning messages for the case. So can let users know
they're actually writing from nullable catalyst schema into non-nullable avro
schema.
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