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From "Thomas Nielsen (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-3349) Nested WHERE EXISTS queries need improved testing
Date Thu, 07 Feb 2008 16:14:08 GMT

     [ https://issues.apache.org/jira/browse/DERBY-3349?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Thomas Nielsen updated DERBY-3349:
----------------------------------

    Attachment: d3349-2.diff

Army had added the WHERE IN ... WHERE IN variant earlier in 3301.

With the 2 patch applied we currently test these combinations:
WHERE EXISTS ... WHERE EXISTS
WHERE EXISTS ... WHERE IN
WHERE EXISTS ... WHERE EXISTS ... WHERE 
WHERE EXISTS ... WHERE 1=1 AND EXISTS
WHERE IN ... WHERE IN

Still left to do:
WHERE EXISTS ... WHERE ANY
WHERE ANY ... WHERE ANY

> Nested WHERE EXISTS queries need improved testing
> -------------------------------------------------
>
>                 Key: DERBY-3349
>                 URL: https://issues.apache.org/jira/browse/DERBY-3349
>             Project: Derby
>          Issue Type: Improvement
>          Components: Test
>            Reporter: Thomas Nielsen
>         Attachments: d3349-1.diff, d3349-1.stat, d3349-2.diff
>
>
> DERBY-3301 reported an error in subquery flattening of nested WHERE EXISTS clauses, or
WHERE EXISTS subqueries. The query returned the wrong number of rows. 
> There is currently some tests for WHERE EXISTS, but none for nested WHERE EXISTS clauses.
> See DERBY-3301 for a full sql repro.

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