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From "Mamta A. Satoor (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-4331) Join returns results in wrong order
Date Tue, 04 Aug 2009 04:35:14 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4331?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12738814#action_12738814
] 

Mamta A. Satoor commented on DERBY-4331:
----------------------------------------

The following query also seems to give wrong results on 10.5 codeline. It has tables REPOSITORIES
and AUTHORS missing compared to the original query. I will try it without the changes for
DERBY-3926 to see if it passes there.

SELECT CS.ID
FROM --DERBY-PROPERTIES joinOrder=FIXED
    FILES F --DERBY-PROPERTIES constraint=FILES_REPOSITORY_PATH
    , FILECHANGES FC --DERBY-PROPERTIES constraint=FILECHANGES_FILE_CHANGESET
    , CHANGESETS CS --DERBY-PROPERTIES constraint=CHANGESETS_PRIMARY_ID
WHERE
 CS.ID = FC.CHANGESET AND
 F.ID = FC.FILE AND
 EXISTS (
  SELECT 1
   FROM FILES F2 --DERBY-PROPERTIES constraint=FILES_REPOSITORY_PATH
   WHERE
          F2.ID = FC.FILE)
 ORDER BY CS.ID DESC;
ID
-----------
1
2
3
2
2
3

6 rows selected


> Join returns results in wrong order
> -----------------------------------
>
>                 Key: DERBY-4331
>                 URL: https://issues.apache.org/jira/browse/DERBY-4331
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.5.2.0, 10.6.0.0
>            Reporter: Knut Anders Hatlen
>         Attachments: notorderby4331.zip, orderby4331.zip, repro.sql, repro2.sql, repro2_qryplan.txt
>
>
> In Derby 10.5.2.0, the query below started returning results in wrong order (note the
ORDER BY clause). Derby 10.5.1.1 gives the expected ordering.
> ij> SELECT CS.ID
> FROM
>     CHANGESETS CS, FILECHANGES FC, REPOSITORIES R, FILES F, AUTHORS A
> WHERE
>     R.PATH = '/var/tmp/source5923202038296723704opengrok/mercurial' AND F.REPOSITORY
= R.ID AND A.REPOSITORY = R.ID AND
>     CS.REPOSITORY = R.ID AND CS.ID = FC.CHANGESET AND F.ID = FC.FILE AND
>     A.ID = CS.AUTHOR AND
>     EXISTS (
>         SELECT 1
>         FROM FILES F2
>         WHERE
>             F2.ID = FC.FILE AND F2.REPOSITORY = R.ID AND
>             F2.PATH LIKE '/%' ESCAPE '#')
> ORDER BY CS.ID DESC;
> ID         
> -----------
> 1          
> 2          
> 3          
> 2          
> 2          
> 3          
> 6 rows selected

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