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https://issues.apache.org/jira/browse/DERBY-5313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13451654#comment-13451654
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Mamta A. Satoor commented on DERBY-5313:
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I downloaded db-derby-10.4.2.0-lib-debug.zip from
http://db.apache.org/derby/releases/release-10.4.2.0.html and see the stack
trace. Knut, I wonder why we are seeing different results. Following is the
query I tried.
java -Dij.exceptionTrace=true org.apache.derby.tools.ij
connect 'jdbc:derby:db1;create=true';
create table t(x int);
insert into t values 1;
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;
> 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: 10.5.3.0, 10.6.1.0, 10.6.2.1, 10.7.1.1, 10.8.1.2
> Reporter: Knut Anders Hatlen
> Labels: derby_triage10_9
>
> 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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