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From "Bryan Pendleton (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-4204) Runtime statistics not collected on re-execution of statement
Date Thu, 07 May 2009 13:34:30 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12706888#action_12706888
] 

Bryan Pendleton commented on DERBY-4204:
----------------------------------------

In the trunk, it would be neat if we could write a test case for this using the new XPLAIN
tables feature.

I don't think we want to do that for the base patch because it would then be hard to back-port
the
patch to 10.5 and earlier.

But if you let me know when you're done with the basic patch, I'll try writing a separate
test-only
patch for the trunk which uses the XPLAIN tables feature to confirm this fix.


> Runtime statistics not collected on re-execution of statement
> -------------------------------------------------------------
>
>                 Key: DERBY-4204
>                 URL: https://issues.apache.org/jira/browse/DERBY-4204
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.3.1.4
>            Reporter: Knut Anders Hatlen
>            Assignee: Knut Anders Hatlen
>            Priority: Minor
>         Attachments: repro.sql, test.diff
>
>
> Runtime statistics are only collected the first time an insert/update/delete statement
is executed. The behaviour changed between Derby 10.2.2.0 and Derby 10.3.1.4, so this was
likely introduced by DERBY-827.
> Reported on derby-dev:
> http://mail-archives.apache.org/mod_mbox/db-derby-dev/200904.mbox/%3c8a0216de0904291334j4bc715c3s6d46fb65e5953659@mail.gmail.com%3e

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