[DERBY-5313] Assert failure with CASE expression in GROUP BY clause

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 10.4.2.1, 10.5.3.0, 10.6.1.0, 10.6.2.1, 10.7.1.1, 10.8.1.2
• Fix Version/s: 10.10.2.1, 10.11.1.1
• Component/s: SQL
• Labels: derby_triage10_11 derby_triage10_9
• Urgency: Normal
• Issue & fix info: High Value Fix, Repro attached
• Bug behavior facts: Regression
• Assignee: Knut Anders Hatlen
• Reporter: Knut Anders Hatlen
• Created: 05/Jul/11 15:37
• Updated: 09/Sep/16 09:52
• Resolved: 03/Oct/14 15:49

Description

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'.

Issue Links

• is related to: DERBY-883 Enhance GROUP BY clause to support expressions instead of just column references.
• relates to: DERBY-6759 Derby 10.10 backport issue (fall 2014)