[
https://issues.apache.org/jira/browse/DERBY-2526?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
A B updated DERBY-2526:
-----------------------
Attachment: d2526_v2.stat
d2526_v2.patch
Thank you for reading the write-up and verifying the fix, Bryan. I'm attaching
a second version of the patch, d2526_v2.patch, which adds some relevant test
cases to the lang/joins.sql test. That test is already run as part of JUnit
via the lang.LangScripts class, so no additional JUnit work is required (I
don't think).
I re-ran derbyall and suites.All on SUSE Linux with ibm142 as a sanity check,
and everything passed. I also verified that if the engine change is backed
out, lang/joins.sql will now fail due to incorrect results.
Thanks again to Bryan for his extensive analysis of the problem. The _v2 patch
is, I think, ready for commit.
> Wrong query results due to column ordering in UNION view
> --------------------------------------------------------
>
> Key: DERBY-2526
> URL: https://issues.apache.org/jira/browse/DERBY-2526
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.0.2.1, 10.1.3.1, 10.2.2.0, 10.3.0.0
> Reporter: Bryan Pendleton
> Assignee: A B
> Attachments: badQuery.log, d2526_v1.html, d2526_v1.patch,
> d2526_v2.patch, d2526_v2.stat, derby-2526.sql, DistinctTestNotes.txt,
> firstTryPatch.diff, goodQuery.log
>
>
> I think both select statements in the attached repro script should return 1
> row, but in fact the first statement returns 1 row and the second returns
> zero rows.
> The only difference between the two statements is that the columns in the
> UNION view are listed in a different order (bvw vs. bvw2).
> This seems like a bug to me; the order of the columns in the view definition
> shouldn't matter, should it?
> As Army noted on the derby-dev list, the fact that this reproduces with 10.0
> means that it is not caused by some of the 10.2 optimizer changes. Something
> else is going wrong.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
