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From "Mamta A. Satoor (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-4115) Provide a way to drop statistics information
Date Wed, 09 May 2012 04:03:06 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4115?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13271057#comment-13271057
] 

Mamta A. Satoor commented on DERBY-4115:
----------------------------------------

Created following jira for exception thrown when empty string is passed for index name to
update/drop statistics procedures
DERBY-5750 Sending an empty string as table name to compress table procedure or empty string
as index name to update statistics procedure makes the parser throw an exception.
                
> Provide a way to drop statistics information
> --------------------------------------------
>
>                 Key: DERBY-4115
>                 URL: https://issues.apache.org/jira/browse/DERBY-4115
>             Project: Derby
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 10.6.1.0
>            Reporter: Kathey Marsden
>            Assignee: Mamta A. Satoor
>         Attachments: DERBY4115_patch1_diff.txt, DERBY4115_patch2_diff.txt, DERBY4115_patch3_diff.txt,
DERBY4115_patch4_diff.txt, DERBY4115_patch5_diff.txt
>
>
> Now that DERBY-269 has been resolved,  users can update statistics, but once they do,
they are committed to using and maintaining the statistics, even if it doesn't improve performance
or they have difficulty maintaining the statistics on a regular basis.  It would be good to
have a way to drop statistics information so that users could revert to the prior behavior
if needed.

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