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https://issues.apache.org/jira/browse/HIVE-3528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13480056#comment-13480056
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Sean Busbey commented on HIVE-3528:
-----------------------------------
FYI, I'm working on the .q test, just building off of the example [on the using
the Avro Serde
page|https://cwiki.apache.org/confluence/display/Hive/AvroSerDe+-+working+with+Avro+from+Hive].
Ran into some difficulty, trying to work back from the test logs to figure out
what I'm doing wrong.
> Avro SerDe doesn't handle serializing Nullable types that require access to a
> Schema
> ------------------------------------------------------------------------------------
>
> Key: HIVE-3528
> URL: https://issues.apache.org/jira/browse/HIVE-3528
> Project: Hive
> Issue Type: Bug
> Components: Serializers/Deserializers
> Reporter: Sean Busbey
> Labels: avro
> Attachments: HIVE-3528.1.patch.txt
>
>
> Deserialization properly handles hiding Nullable Avro types, including
> complex types like record, map, array, etc. However, when Serialization
> attempts to write out these types it erroneously makes use of the UNION
> schema that contains NULL and the other type.
> This results in Schema mis-match errors for Record, Array, Enum, Fixed, and
> Bytes.
> Here's a [review board of unit tests that express the
> problem|https://reviews.apache.org/r/7431/], as well as one that supports the
> case that it's only when the schema is needed.
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