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From "Jason Dere (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-4844) Add char/varchar data types
Date Wed, 31 Jul 2013 01:34:46 GMT

    [ https://issues.apache.org/jira/browse/HIVE-4844?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13724729#comment-13724729
] 

Jason Dere commented on HIVE-4844:
----------------------------------

Hi Xuefu, 

- The patch currently just keeps the params as part of the type string, which means no metastore
changes, but could be brittle in other situations. An alternative could be additional columns
in the COLUMNS metastore table to hold type qualifiers, similar to what other DB catalogs
have, or a separate table of column_id/param_name/param_value. Do you have any suggestions
here?

- For inheritance, do you mean for the primitive/writable types? String is a final class,
so I don't think it's doable for the primitive. I suppose the writable could derive from Text.


- Sure, a wiki page makes sense.  I'll put one up once I get wiki access.
                
> 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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