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Posted to issues@hive.apache.org by "Swarnim Kulkarni (JIRA)" <ji...@apache.org> on 2015/09/09 06:32:45 UTC

[jira] [Commented] (HIVE-10708) Add SchemaCompatibility check to AvroDeserializer

    [ https://issues.apache.org/jira/browse/HIVE-10708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14736147#comment-14736147 ] 

Swarnim Kulkarni commented on HIVE-10708:
-----------------------------------------

Decided to add a simple flag to turn this compatibility check on. Keeping this flag off by default for backwards compatibility.

> Add SchemaCompatibility check to AvroDeserializer
> -------------------------------------------------
>
>                 Key: HIVE-10708
>                 URL: https://issues.apache.org/jira/browse/HIVE-10708
>             Project: Hive
>          Issue Type: Improvement
>          Components: Serializers/Deserializers
>            Reporter: Swarnim Kulkarni
>            Assignee: Swarnim Kulkarni
>
> Avro provides a nice API[1] to check if the given reader schema can be used to deserialize the data given its writer schema. I think it would be super nice to integrate this into the AvroDeserializer so that we can fail fast and gracefully if there is a bad schema compatibility
> [1] https://avro.apache.org/docs/1.7.7/api/java/org/apache/avro/SchemaCompatibility.html



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