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From "Jakob Homan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3528) Avro SerDe doesn't handle serializing Nullable types that require access to a Schema
Date Tue, 09 Oct 2012 01:10:02 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13472023#comment-13472023
] 

Jakob Homan commented on HIVE-3528:
-----------------------------------

Looks good.  Added a couple comments to reviewboard.  Also, it would be great to add a .q
test that the Avro Serde can handle null records (with a proper nullable Avro schema) from
other formats from Hive.  Had meant to do that during the Apachification.  If you'd like to
add that to this patch, that'd be great.  If not, I'll spin up a quick test after this gets
committed.  
                
> 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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