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https://issues.apache.org/jira/browse/HIVE-3323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13444247#comment-13444247
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Travis Crawford commented on HIVE-3323:
---------------------------------------
Hey all, good discussion about this enum issue. After thinking about the
comments, I think it would be appropriate to always convert enum values to
strings, as the Avro serde does.
Here's why:
* Native Hive queries: enums-as-strings make the most sense
* Pig queries through HCat: enums-as-strings make the most sense
* MR jobs through HCat: enums-as-strings are reasonable, and if users actually
want the int value they can convert in their code.
Since enums-as-strings makes sense for scripting languages, and users do not
loose functionality in MR jobs, I think it makes sense to always convert enums
to strings.
Thoughts? If this sounds good I can update the patch.
> ThriftSerde: Enable enum to string conversions
> ----------------------------------------------
>
> Key: HIVE-3323
> URL: https://issues.apache.org/jira/browse/HIVE-3323
> Project: Hive
> Issue Type: Improvement
> Affects Versions: 0.10.0
> Reporter: Travis Crawford
> Assignee: Travis Crawford
> Attachments: HIVE-3323_enum_to_string.1.patch,
> HIVE-3323_enum_to_string.2.patch, HIVE-3323_enum_to_string.3.patch,
> HIVE-3323_enum_to_string.4.patch, HIVE-3323_enum_to_string.5.patch
>
>
> When using serde-reported schemas with the ThriftDeserializer, Enum fields
> are presented as {{struct<value:int>}}
> Many users expect to work with the string values, which is both easier and
> more meaningful as the string value communicates what is represented.
> Hive should provide a mechanism to optionally convert enum values to strings.
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