[
https://issues.apache.org/jira/browse/DERBY-6563?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Knut Anders Hatlen resolved DERBY-6563.
---------------------------------------
Resolution: Fixed
Fix Version/s: 10.11.0.0
Issue & fix info: Repro attached (was: Patch Available,Repro attached)
Thanks for reviewing the patch, Dag!
> NOT elimination for CASE expressions is broken
> ----------------------------------------------
>
> Key: DERBY-6563
> URL: https://issues.apache.org/jira/browse/DERBY-6563
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.10.2.0
> Reporter: Knut Anders Hatlen
> Assignee: Knut Anders Hatlen
> Fix For: 10.11.0.0
>
> Attachments: d6563-1a.diff
>
>
> NOT elimination for CASE expressions seems to be broken. Take this example:
> {noformat}
> ij> select * from sysibm.sysdummy1 where not ( case when ibmreqd = 'Y' then
> true else true end );
> IBM&
> ----
> Y
> 1 row selected
> {noformat}
> Both branches of the CASE expression evaluate to TRUE, so one would expect
> the predicate "not ( case ... )" to evaluate to FALSE, and the query should
> return an empty result.
--
This message was sent by Atlassian JIRA
(v6.2#6252)
