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From "Lily Wei (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-4771) Continue investigation of automatic creation/update of index statistics
Date Mon, 13 Sep 2010 06:03:32 GMT

     [ https://issues.apache.org/jira/browse/DERBY-4771?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lily Wei updated DERBY-4771:
----------------------------

    Attachment: rjall.out

Hi Kristian:
     Thank you for doing such a great work. I am very interested of this feature and would
love to keep learning about this feature. The check for container opened in read-only mode
error behaves much better. I was wondering, is it a good idea to check set a flag on PrepareStatement
that possible allow check about database status somewhere between generating PreparedStatement
and the time we check for exception in  GenericStatement.java for store, lcc, tx or something
else? Could it help the situation we are in? 

     I did run the Suites.all test suits. This is for reference point only. I got 6 failures.
Four of them are all for lang.OrderByAndSortAvoidance except testOSReadOnly is having permission
problem when it try to remove directory: c:\derby2\trunk\testallpackages\system\singleUse\readOnly
or copy directory from c:\derby2\trunk\testallpackages\system\singleUse\oneuse4e to c:\derby2\trunk\testallpackages\system\singleUse\readOnly
  Hope this help!


> Continue investigation of automatic creation/update of index statistics
> -----------------------------------------------------------------------
>
>                 Key: DERBY-4771
>                 URL: https://issues.apache.org/jira/browse/DERBY-4771
>             Project: Derby
>          Issue Type: Task
>            Reporter: Kristian Waagan
>         Attachments: derby-4771-1a-prototype_code_dump.diff, derby-4771-1a-prototype_code_dump.stat,
derby-4771-1b-prototype_code_dump.diff, rjall.out, rjall.out
>
>
> Work was started to improve Derby's handling of index statistics. This issue tracks further
discussion and work for this task.

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