How to know number of tuples?

And, what is query plan?

I cannot test it in 8.6 because 8.6 consist of another annoying bug that I haven't reported.

Assertion failed error when joining multiple native queries. ------------------------------------------------------------ Key: TEIID-2872 URL: https://issues.jboss.org/browse/TEIID-2872 Project: Teiid Issue Type: Bug Affects Versions: 8.5 Environment: Windows 2003 server, Windows 7 Reporter: SHI HONG CHIN Assignee: Steven Hawkins Attachments: JakkerData-vdb.xml, sql4.sql If I join multiple native queries, the following error occurred: 11:24:16,553 ERROR [org.teiid.PROCESSOR] (Worker21_QueryProcessorQueue534) ePitQkul9Wn5 TEIID30019 Unexpected exception for request ePitQkul9Wn5.0: java.lang.AssertionError: ASSERTION FAILED: expected reference to be not null at org.teiid.core.util.Assertion.failed(Assertion.java:73) [teiid-common-core-8.5.0.Final.jar:8.5.0.Final] at org.teiid.core.util.Assertion.isNotNull(Assertion.java:100) [teiid-common-core-8.5.0.Final.jar:8.5.0.Final] at org.teiid.core.util.Assertion.isNotNull(Assertion.java:92) [teiid-common-core-8.5.0.Final.jar:8.5.0.Final] at org.teiid.common.buffer.TupleBuffer.getBatch(TupleBuffer.java:287) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.query.processor.BatchIterator.finalRow(BatchIterator.java:63) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.common.buffer.AbstractTupleSource.getCurrentTuple(AbstractTupleSource.java:70) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.query.processor.BatchIterator.getCurrentTuple(BatchIterator.java:84) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.common.buffer.AbstractTupleSource.nextTuple(AbstractTupleSource.java:48) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.query.processor.relational.SortUtility.initialSort(SortUtility.java:257) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.query.processor.relational.SortUtility.sort(SortUtility.java:190) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.query.processor.relational.SourceState.sort(SourceState.java:315) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.query.processor.relational.MergeJoinStrategy.loadRight(MergeJoinStrategy.java:359) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.query.processor.relational.EnhancedSortMergeJoinStrategy.loadRight(EnhancedSortMergeJoinStrategy.java:257) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.query.processor.relational.JoinNode.nextBatchDirect(JoinNode.java:208) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.query.processor.relational.RelationalNode.nextBatch(RelationalNode.java:278) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.query.processor.relational.ProjectNode.nextBatchDirect(ProjectNode.java:146) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.query.processor.relational.RelationalNode.nextBatch(RelationalNode.java:278) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.query.processor.relational.RelationalPlan.nextBatch(RelationalPlan.java:136) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.query.processor.QueryProcessor.nextBatchDirect(QueryProcessor.java:151) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.query.processor.QueryProcessor.nextBatch(QueryProcessor.java:114) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.query.processor.BatchCollector.collectTuples(BatchCollector.java:155) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.dqp.internal.process.RequestWorkItem.processMore(RequestWorkItem.java:435) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.dqp.internal.process.RequestWorkItem.process(RequestWorkItem.java:320) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.dqp.internal.process.AbstractWorkItem.run(AbstractWorkItem.java:51) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.dqp.internal.process.RequestWorkItem.run(RequestWorkItem.java:248) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.dqp.internal.process.DQPWorkContext.runInContext(DQPWorkContext.java:269) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.dqp.internal.process.ThreadReuseExecutor$RunnableWrapper.run(ThreadReuseExecutor.java:119) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at org.teiid.dqp.internal.process.ThreadReuseExecutor$3.run(ThreadReuseExecutor.java:214) [teiid-engine-8.5.0.Final.jar:8.5.0.Final] at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) [rt.jar:1.6.0_45] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) [rt.jar:1.6.0_45] at java.lang.Thread.run(Thread.java:662) [rt.jar:1.6.0_45]