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https://issues.apache.org/jira/browse/DERBY-3349?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12569881#action_12569881
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Dyre Tjeldvoll commented on DERBY-3349:
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Merged to 10.3 in revision 628704.
> 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
> Affects Versions: 10.2.2.0, 10.3.2.1
> Reporter: Thomas Nielsen
> Assignee: Thomas Nielsen
> Fix For: 10.3.2.2, 10.4.0.0
>
> Attachments: d3349-1.diff, d3349-1.stat, d3349-2.diff, d3349-3.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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