[teiid-issues] [JBoss JIRA] (TEIID-2890) IndexOutOfBoundsException when using GROUP BY

[Tom Arnold (JIRA)]

Tom Arnold created TEIID-2890:
---------------------------------

             Summary: IndexOutOfBoundsException when using GROUP BY
                 Key: TEIID-2890
                 URL: https://issues.jboss.org/browse/TEIID-2890
             Project: Teiid
          Issue Type: Bug
          Components: Query Engine
            Reporter: Tom Arnold
            Assignee: Steven Hawkins
            Priority: Minor


I have a translator that does not support aggregates or grouping. I am using a view to try to normalize data from several sources. I am duplicating some of the fields as an approximation. I have existing software that is querying with GROUP BY, and sometimes this happens.

This query works fine in 8.6:
{code:sql}
select identifier
from foo.items
group by identifier, identifier;
{code}

In 8.7 this happens:
{code}
10:15:24,280 ERROR [org.teiid.PROCESSOR] (Worker2_QueryProcessorQueue39) njknuxobPkVY TEIID30019 Unexpected exception for request njknuxobPkVY.3: java.lang.IndexOutOfBoundsException: Index: 1, Size: 1
    at java.util.ArrayList.rangeCheck(ArrayList.java:604) [rt.jar:1.7.0_02]
    at java.util.ArrayList.get(ArrayList.java:382) [rt.jar:1.7.0_02]
    at org.teiid.query.processor.relational.MergeJoinStrategy.compareTuples(MergeJoinStrategy.java:313) [teiid-engine-8.7.0.Beta2-SNAPSHOT.jar:8.7.0.Beta2-SNAPSHOT]
    at org.teiid.query.processor.relational.GroupingNode.sameGroup(GroupingNode.java:488) [teiid-engine-8.7.0.Beta2-SNAPSHOT.jar:8.7.0.Beta2-SNAPSHOT]
    at org.teiid.query.processor.relational.GroupingNode.groupPhase(GroupingNode.java:414) [teiid-engine-8.7.0.Beta2-SNAPSHOT.jar:8.7.0.Beta2-SNAPSHOT]
    at org.teiid.query.processor.relational.GroupingNode.nextBatchDirect(GroupingNode.java:336) [teiid-engine-8.7.0.Beta2-SNAPSHOT.jar:8.7.0.Beta2-SNAPSHOT]
    at org.teiid.query.processor.relational.RelationalNode.nextBatch(RelationalNode.java:278) [teiid-engine-8.7.0.Beta2-SNAPSHOT.jar:8.7.0.Beta2-SNAPSHOT]
    at org.teiid.query.processor.relational.ProjectNode.nextBatchDirect(ProjectNode.java:146) [teiid-engine-8.7.0.Beta2-SNAPSHOT.jar:8.7.0.Beta2-SNAPSHOT]
    at org.teiid.query.processor.relational.RelationalNode.nextBatch(RelationalNode.java:278) [teiid-engine-8.7.0.Beta2-SNAPSHOT.jar:8.7.0.Beta2-SNAPSHOT]
    at org.teiid.query.processor.relational.RelationalPlan.nextBatch(RelationalPlan.java:136) [teiid-engine-8.7.0.Beta2-SNAPSHOT.jar:8.7.0.Beta2-SNAPSHOT]
    at org.teiid.query.processor.QueryProcessor.nextBatchDirect(QueryProcessor.java:151) [teiid-engine-8.7.0.Beta2-SNAPSHOT.jar:8.7.0.Beta2-SNAPSHOT]
    at org.teiid.query.processor.QueryProcessor.nextBatch(QueryProcessor.java:114) [teiid-engine-8.7.0.Beta2-SNAPSHOT.jar:8.7.0.Beta2-SNAPSHOT]
    at org.teiid.query.processor.BatchCollector.collectTuples(BatchCollector.java:159) [teiid-engine-8.7.0.Beta2-SNAPSHOT.jar:8.7.0.Beta2-SNAPSHOT]
    at org.teiid.query.processor.BatchCollector.collectTuples(BatchCollector.java:141) [teiid-engine-8.7.0.Beta2-SNAPSHOT.jar:8.7.0.Beta2-SNAPSHOT]
    at org.teiid.dqp.internal.process.RequestWorkItem.processMore(RequestWorkItem.java:435) [teiid-engine-8.7.0.Beta2-SNAPSHOT.jar:8.7.0.Beta2-SNAPSHOT]
    at org.teiid.dqp.internal.process.RequestWorkItem.process(RequestWorkItem.java:320) [teiid-engine-8.7.0.Beta2-SNAPSHOT.jar:8.7.0.Beta2-SNAPSHOT]
    at org.teiid.dqp.internal.process.AbstractWorkItem.run(AbstractWorkItem.java:51) [teiid-engine-8.7.0.Beta2-SNAPSHOT.jar:8.7.0.Beta2-SNAPSHOT]
    at org.teiid.dqp.internal.process.RequestWorkItem.run(RequestWorkItem.java:248) [teiid-engine-8.7.0.Beta2-SNAPSHOT.jar:8.7.0.Beta2-SNAPSHOT]
    at org.teiid.dqp.internal.process.DQPWorkContext.runInContext(DQPWorkContext.java:273) [teiid-engine-8.7.0.Beta2-SNAPSHOT.jar:8.7.0.Beta2-SNAPSHOT]
    at org.teiid.dqp.internal.process.ThreadReuseExecutor$RunnableWrapper.run(ThreadReuseExecutor.java:119) [teiid-engine-8.7.0.Beta2-SNAPSHOT.jar:8.7.0.Beta2-SNAPSHOT]
    at org.teiid.dqp.internal.process.ThreadReuseExecutor$3.run(ThreadReuseExecutor.java:214) [teiid-engine-8.7.0.Beta2-SNAPSHOT.jar:8.7.0.Beta2-SNAPSHOT]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [rt.jar:1.7.0_02]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [rt.jar:1.7.0_02]
    at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_02]
{code}



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