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From "Xuefu Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-5565) Limit Hive decimal type maximum precision and scale to 38
Date Tue, 19 Nov 2013 15:09:23 GMT

     [ https://issues.apache.org/jira/browse/HIVE-5565?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Xuefu Zhang updated HIVE-5565:
------------------------------

    Attachment: HIVE-5565.4.patch

Patch #4 contained a temp fix for udf_when/case failure, the same issue as faced in HIVE-5356.
The fix don't need to get in if HIVE-5356 gets in first.

> Limit Hive decimal type maximum precision and scale to 38
> ---------------------------------------------------------
>
>                 Key: HIVE-5565
>                 URL: https://issues.apache.org/jira/browse/HIVE-5565
>             Project: Hive
>          Issue Type: Task
>          Components: Types
>    Affects Versions: 0.13.0
>            Reporter: Xuefu Zhang
>            Assignee: Xuefu Zhang
>         Attachments: HIVE-5565.1.patch, HIVE-5565.2.patch, HIVE-5565.3.patch, HIVE-5565.4.patch,
HIVE-5565.patch
>
>
> With HIVE-3976, the maximum precision is set to 65, and maximum scale is to 30. After
discussing with several folks in the community, it's determined that 38 as a maximum for both
precision and scale are probably sufficient, in addition to the potential performance boost
that might become possible to some implementation.
> This task is to make such a change. The change is expected to be trivial, but it may
impact many test cases. The reason for a separate JIRA is that patch in HIVE-3976 is already
in a good shape. Rather than destabilizing a bigger patch, a dedicate patch will facilitates
both reviews.
> The wiki document will be updated shortly.



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