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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2019/05/23 03:34:34 UTC
[GitHub] [spark] dongjoon-hyun commented on issue #24682: [SPARK-27762][SQL]
[FOLLOWUP] Add behavior change for Avro writer in migration guide
dongjoon-hyun commented on issue #24682: [SPARK-27762][SQL] [FOLLOWUP] Add behavior change for Avro writer in migration guide
URL: https://github.com/apache/spark/pull/24682#issuecomment-495054805
I understand the concern about the difference from our default `.schema` option. I believe this is the main reason why we add `.option("avroSchema", ...)`.
For Avro, `nullable` column type is `"type": ["int", "null"]` and non-nullable column type is `"type": "int"` explicitly.
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