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From "Prasad Chakka (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-571) add ability to rename a column.
Date Tue, 22 Dec 2009 21:10:29 GMT

    [ https://issues.apache.org/jira/browse/HIVE-571?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12793790#action_12793790
] 

Prasad Chakka commented on HIVE-571:
------------------------------------

if we can support changing of the column type in other alter table statements (REPLACE COLUMNS),
why not support it here? also why not exactly support the mysql syntax

{code}
CHANGE [COLUMN] old_col_name new_col_name column_definition
        [FIRST|AFTER col_name]
{code}

atleast we should support changing the comment.


> add ability to rename a column.
> -------------------------------
>
>                 Key: HIVE-571
>                 URL: https://issues.apache.org/jira/browse/HIVE-571
>             Project: Hadoop Hive
>          Issue Type: Improvement
>          Components: Metastore
>    Affects Versions: 0.4.0
>            Reporter: Prasad Chakka
>            Assignee: He Yongqiang
>             Fix For: 0.5.0
>
>         Attachments: hive-571-2009-12-22.patch
>
>
> currently only way to rename a column is to use 'REPLACE COLUMNS' which can be cumbersome
if the table has lots of columns.

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