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

[Steven Hawkins (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-2890?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins updated TEIID-2890:
----------------------------------

        Fix Version/s: 8.7
             Priority: Major  (was: Minor)
    Affects Version/s: 8.4
                           (was: 8.7)


This seemed to be reproducible for me back to 8.4.  Although that was using the repository versions, rather than finals so I'm not sure if there could have been a patch regression to explain why you didn't see this on 8.6.  In any case the issue is the indexing logic in the grouping node assumes that each order by expression is unique, which is something that we don't enforce.
                
> IndexOutOfBoundsException when using GROUP BY
> ---------------------------------------------
>
>                 Key: TEIID-2890
>                 URL: https://issues.jboss.org/browse/TEIID-2890
>             Project: Teiid
>          Issue Type: Bug
>          Components: Query Engine
>    Affects Versions: 8.4
>            Reporter: Tom Arnold
>            Assignee: Steven Hawkins
>              Labels: 8.7, grouping, translator
>             Fix For: 8.7
>
>
> 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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