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https://issues.apache.org/jira/browse/DERBY-5313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14156754#comment-14156754
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ASF subversion and git services commented on DERBY-5313:
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Commit 1629018 from mi...@apache.org in branch 'code/branches/10.10'
[ https://svn.apache.org/r1629018 ]
DERBY-5313: Assert failure with CASE expression in GROUP BY clause
backported change #1575866 from trunk to 10.10 branch, had to do hand
merging due to jdk5 code differences in 10.11.
Remove assert that doesn't expect expressions in the GROUP BY list.
> Assert failure with CASE expression in GROUP BY clause
> ------------------------------------------------------
>
> Key: DERBY-5313
> URL: https://issues.apache.org/jira/browse/DERBY-5313
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.4.2.1, 10.5.3.0, 10.6.1.0, 10.6.2.1, 10.7.1.1,
> 10.8.1.2
> Reporter: Knut Anders Hatlen
> Assignee: Mike Matrigali
> Labels: derby_triage10_11, derby_triage10_9
> Fix For: 10.11.1.1
>
> Attachments: d5313-1a.diff
>
>
> I see the following assert failure with debug jars on 10.5.3.0 and later
> (doesn't fail on 10.5.1.1 and earlier):
> ij> create table t(x int);
> 0 rows inserted/updated/deleted
> ij> insert into t values 1;
> 1 row inserted/updated/deleted
> ij> select case when a=1 then 1 else 2 end
> from t t1(a) join t t2(b) on a=b
> group by case when a=1 then 1 else 2 end;
> ERROR XJ001: Java exception: 'ASSERT FAILED retVN expected to be instanceof
> ColumnReference, not org.apache.derby.impl.sql.compile.ConditionalNode:
> org.apache.derby.shared.common.sanity.AssertFailure'.
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