[teiid-issues] [JBoss JIRA] (TEIID-5686) NPE in MergeJoinStrategy when using joins with a particular limit value
dalex dalex (Jira)
issues at jboss.org
Tue Mar 19 06:50:00 EDT 2019
[ https://issues.jboss.org/browse/TEIID-5686?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13710119#comment-13710119 ]
dalex dalex commented on TEIID-5686:
------------------------------------
[~shawkins] thx a lot for the quick fix, I checked these changes locally, it worked!
> NPE in MergeJoinStrategy when using joins with a particular limit value
> -----------------------------------------------------------------------
>
> Key: TEIID-5686
> URL: https://issues.jboss.org/browse/TEIID-5686
> Project: Teiid
> Issue Type: Bug
> Components: Query Engine
> Affects Versions: 12.0
> Environment: teiid-12.0.0 on WildFly Full 14.0.1.Final (WildFly Core 6.0.2.Final)
> Reporter: dalex dalex
> Assignee: Steven Hawkins
> Priority: Major
> Fix For: 12.2
>
>
> When running the following query (IMPORTANT: you shouldn't use row limit):
> {code:sql}
> begin
> declare integer i=0;
> while (i < 2)
> begin
> select *
> from "test_tables_pg.test_a" t0
> JOIN "test_tables_pg.test_e" t1
> ON true
> JOIN "test_tables_pg.test_e" t2
> ON true
> JOIN views.v t3
> on true
> JOIN views.v t4
> on true
> limit 257 ;
> i=i+1;
> end
> end ;;
> {code}
> teiid throws out the following NPE:
> {code:noformat}
> 2019-03-13 13:50:28,582 ERROR [org.teiid.PROCESSOR] (Worker4_QueryProcessorQueue233) InwGU8fhfbja TEIID30019 Unexpected exception for request InwGU8fhfbja.22: java.lang.NullPointerEx
> ception
> at org.teiid.query.processor.relational.MergeJoinStrategy.compareToPrevious(MergeJoinStrategy.java:284)
> at org.teiid.query.processor.relational.MergeJoinStrategy.process(MergeJoinStrategy.java:238)
> at org.teiid.query.processor.relational.JoinNode.nextBatchDirectInternal(JoinNode.java:260)
> at org.teiid.query.processor.relational.JoinNode.nextBatchDirect(JoinNode.java:195)
> at org.teiid.query.processor.relational.RelationalNode.nextBatch(RelationalNode.java:277)
> at org.teiid.query.processor.relational.LimitNode.nextBatchDirect(LimitNode.java:98)
> at org.teiid.query.processor.relational.RelationalNode.nextBatch(RelationalNode.java:277)
> at org.teiid.query.processor.relational.ProjectNode.nextBatchDirect(ProjectNode.java:146)
> at org.teiid.query.processor.relational.RelationalNode.nextBatch(RelationalNode.java:277)
> at org.teiid.query.processor.relational.RelationalPlan.nextBatch(RelationalPlan.java:141)
> at org.teiid.query.processor.QueryProcessor.nextBatchDirect(QueryProcessor.java:148)
> at org.teiid.query.processor.QueryProcessor.nextBatch(QueryProcessor.java:111)
> at org.teiid.query.processor.BatchIterator.finalRow(BatchIterator.java:65)
> at org.teiid.common.buffer.AbstractTupleSource.getCurrentTuple(AbstractTupleSource.java:66)
> at org.teiid.query.processor.BatchIterator.getCurrentTuple(BatchIterator.java:80)
> at org.teiid.common.buffer.AbstractTupleSource.nextTuple(AbstractTupleSource.java:44)
> at org.teiid.query.processor.proc.ProcedurePlan.nextBatchDirect(ProcedurePlan.java:303)
> at org.teiid.query.processor.proc.ProcedurePlan.nextBatch(ProcedurePlan.java:269)
> at org.teiid.query.processor.QueryProcessor.nextBatchDirect(QueryProcessor.java:148)
> at org.teiid.query.processor.QueryProcessor.nextBatch(QueryProcessor.java:111)
> at org.teiid.query.processor.BatchCollector.collectTuples(BatchCollector.java:160)
> at org.teiid.query.processor.BatchCollector.collectTuples(BatchCollector.java:142)
> at org.teiid.dqp.internal.process.RequestWorkItem.processMore(RequestWorkItem.java:492)
> at org.teiid.dqp.internal.process.RequestWorkItem.process(RequestWorkItem.java:362)
> at org.teiid.dqp.internal.process.AbstractWorkItem.run(AbstractWorkItem.java:43)
> at org.teiid.dqp.internal.process.RequestWorkItem.run(RequestWorkItem.java:285)
> at org.teiid.dqp.internal.process.DQPWorkContext.runInContext(DQPWorkContext.java:281)
> at org.teiid.dqp.internal.process.ThreadReuseExecutor$RunnableWrapper.run(ThreadReuseExecutor.java:113)
> at org.teiid.dqp.internal.process.ThreadReuseExecutor$3.run(ThreadReuseExecutor.java:199)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> {code}
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