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From "Ruslan Dautkhanov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-4921) Upgrade COMMENT column size in table COLUMNS_V2 and TYPE_FIELDS from 256 to 4000
Date Tue, 11 Jun 2019 19:27:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-4921?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16861385#comment-16861385
] 

Ruslan Dautkhanov commented on HIVE-4921:
-----------------------------------------

We have some wide tables for modeling, and comments describe levels of some categorical features.

Very convenient to use in Hue and other tools like that .

256 is too short 

> Upgrade COMMENT column size in table COLUMNS_V2 and TYPE_FIELDS from 256 to 4000
> --------------------------------------------------------------------------------
>
>                 Key: HIVE-4921
>                 URL: https://issues.apache.org/jira/browse/HIVE-4921
>             Project: Hive
>          Issue Type: Bug
>          Components: Metastore
>    Affects Versions: 0.10.0, 0.11.0
>            Reporter: Xuefu Zhang
>            Assignee: Xuefu Zhang
>            Priority: Major
>
> There are three tables in Hive metastore schema having COMMENT COLUMN: PARTITIION_KEYS,
COLUMNS_V2, and TYPE_FIELDS, and their sizes are different. PARTITIION_KEYS.COMMENT has a
size of 4000. To be consistent, and to make it more reasonable, we need to promote the column
in other two tables from the current size (256) to 4000.



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