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https://issues.apache.org/jira/browse/HIVE-4844?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13725983#comment-13725983
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Jason Dere commented on HIVE-4844:
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Added a doc to the wiki at
https://cwiki.apache.org/confluence/display/Hive/Type+Qualifiers+in+Hive.
Ed, for the metastore changes, would additional columns in the COLUMNS_V2
metastore table be fine, if they are set to NULLs if there are no type
qualifiers?
Xuefu, yeah for char/varchar I was thinking they could probably share some
inheritance, especially since they need to do some length checking, though I
hadn't really thought about if they should share with existing String/Text.
Well, they can't inherit String as I mentioned before. For
decimal/decimal(p,s), I think the existing HiveDecimal might be fine, since I
think the actual enforcement of precision/scale might happen at the
ObjectInspectors/Converters/cast/deserialization.
> Add char/varchar data types
> ---------------------------
>
> Key: HIVE-4844
> URL: https://issues.apache.org/jira/browse/HIVE-4844
> Project: Hive
> Issue Type: New Feature
> Components: Types
> Reporter: Jason Dere
> Assignee: Jason Dere
> Attachments: HIVE-4844.1.patch.hack
>
>
> Add new char/varchar data types which have support for more SQL-compliant
> behavior, such as SQL string comparison semantics, max length, etc.
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