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From "Lily Wei (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-4166) improvements to the mailjdbc test
Date Mon, 06 Jul 2009 14:38:14 GMT

     [ https://issues.apache.org/jira/browse/DERBY-4166?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lily Wei updated DERBY-4166:
----------------------------

    Attachment: Derby-4166.diff

Change the test to reflect the following points:
1. Take out attach_id column from INBOX table. Add to_delete column to ATTACH table. Change
the logic for insert into attach table. Right now, it will try to insert a attachment for
each unique id in INBOX. We will mark rows that will be deleted by  DeleteMailByUser(). After
all the mails have been deleted from one of the thread, SYSCS_UTILS.SYSCS_INPLACE_COMPRESS_TABLE
should reclaim space. 
2. Change calculation of database size.
3. Add some queries to Statements.java
4. Change log info to achieve easier to read goal
5. Use user REFRESH instead of BACKUP on backup thread to avoid Derby-4295 issue
6. line: message_id = Rn.nextInt(count - 1) had been changed.

Potential issues:
The number of blob insert does not reflect the rows had been deleted from ATTACH table. 
The log to track space has been return to O.S. is not very intuitive from the log information.


> improvements to the mailjdbc test
> ---------------------------------
>
>                 Key: DERBY-4166
>                 URL: https://issues.apache.org/jira/browse/DERBY-4166
>             Project: Derby
>          Issue Type: Improvement
>          Components: Test
>    Affects Versions: 10.6.0.0
>            Reporter: Kathey Marsden
>            Priority: Minor
>         Attachments: Derby-4166.diff
>
>
> When recently working with the mailjdbc system test org.apache.derbyTesting.system.mailjdbc
on DERBY-4152 I noticed some potential improvements that might be good for the test.  We should
probably hold off on these improvements however until the root cause of DERBY-4152 is established,
however, so we don't muddy the waters with that issue by changing the test.
> 1) DbTasks.moveToFolders may throw an IllegalArgumentException.
>   There is a line:  message_id = Rn.nextInt(count - 1);
>   if count is 1 the argument to nextInt() might be 0 which is not allowed.  I hit this
once but lost the stack trace, but it is apparent that when there is only one row in the table
this can occur.
>  
> 2) Allow/implement multiple attachments per message and cleanup DbTasks.insertMail()
logic.
>    - Remove the attach_id column from INBOX to allow multiple attachments.
>    -Make the attachment insert part of the message for loop in insertMail.
>    Use getGeneratedKeys() to get the id of the inserted message.
>    When attachments are inserted, insert (1-4) attachments and give them a corresponding
attach_id from 1-4.
> This will allow for removal of the select statements used to determine id and attach_id.
 I'll file another issue for these improvements if folks agree that they are sensible.
> A detailed description of the current implementation of insertMail is described at https://issues.apache.org/jira/secure/attachment/12405685/insertMailSummary.txt
> 3) DbTasks.databaseSize calculation is wrong. It doesn't match du -sk. The method does
not recurse into subdirectories and includes the length() on directory files which is undefined
accourding to the file.length() javadoc.

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