[teiid-issues] [JBoss JIRA] (TEIID-2525) Prefetch doesn't work when clause contains LIMIT keyword

[Filip Nguyen (JIRA)]

Filip Nguyen created TEIID-2525:
-----------------------------------

             Summary: Prefetch doesn't work when clause contains LIMIT keyword
                 Key: TEIID-2525
                 URL: https://issues.jboss.org/browse/TEIID-2525
             Project: Teiid
          Issue Type: Bug
    Affects Versions: 8.4, 7.7.7
            Reporter: Filip Nguyen
            Assignee: Steven Hawkins
            Priority: Critical


Doesn't work both in the newest Teiid and the 7.x version.

Not sure how critical this is. When setting the prefetch via JDBC and using FORWARD_ONLY result set [1] I am getting exceptions [2] when using LIMIT clause in the SQL. 

{code:java} 
		TeiidDataSource ds = new TeiidDataSource();
		ds.setDatabaseName(vdb);
		ds.setUser("user");
		ds.setPassword("user");
		ds.setServerName(host);
		ds.setPortNumber(Integer.valueOf(port));
		ds.setFetchSize(10);
 ....
Statement statement = connection.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY);
{code} 

[2] 
{code:java} 
Eorg.teiid.jdbc.TeiidSQLException: ASSERTION FAILED: expected reference to be not null
	at org.teiid.jdbc.TeiidSQLException.create(TeiidSQLException.java:113)
	at org.teiid.jdbc.TeiidSQLException.create(TeiidSQLException.java:70)
	at org.teiid.jdbc.ResultSetImpl.processBatch(ResultSetImpl.java:402)
	at org.teiid.jdbc.ResultSetImpl.requestBatch(ResultSetImpl.java:375)
	at org.teiid.jdbc.BatchResults.requestBatchAndWait(BatchResults.java:226)
	at org.teiid.jdbc.BatchResults.requestNextBatch(BatchResults.java:141)
	at org.teiid.jdbc.BatchResults.hasNext(BatchResults.java:252)
	at org.teiid.jdbc.ResultSetImpl.hasNext(ResultSetImpl.java:439)
	at org.teiid.jdbc.ResultSetImpl.next(ResultSetImpl.java:251)
	at JDBCClient.execute(JDBCClient.java:90)
	at JDBCClient.main(JDBCClient.java:45)
Caused by: org.teiid.core.TeiidException: ASSERTION FAILED: expected reference to be not null
	at org.teiid.client.ResultsMessage.setException(ResultsMessage.java:202)
	at org.teiid.dqp.internal.process.RequestWorkItem.sendError(RequestWorkItem.java:955)
	at org.teiid.dqp.internal.process.RequestWorkItem.close(RequestWorkItem.java:543)
	at org.teiid.dqp.internal.process.RequestWorkItem.process(RequestWorkItem.java:346)
	at org.teiid.dqp.internal.process.AbstractWorkItem.run(AbstractWorkItem.java:51)
	at org.teiid.dqp.internal.process.RequestWorkItem.run(RequestWorkItem.java:248)
	at org.teiid.dqp.internal.process.DQPWorkContext.runInContext(DQPWorkContext.java:269)
	at org.teiid.dqp.internal.process.ThreadReuseExecutor$RunnableWrapper.run(ThreadReuseExecutor.java:119)
	at org.teiid.dqp.internal.process.ThreadReuseExecutor$3.run(ThreadReuseExecutor.java:214)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
	at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.AssertionError: ASSERTION FAILED: expected reference to be not null
	at org.teiid.core.util.Assertion.failed(Assertion.java:73)
	at org.teiid.core.util.Assertion.isNotNull(Assertion.java:100)
	at org.teiid.core.util.Assertion.isNotNull(Assertion.java:92)
	at org.teiid.common.buffer.TupleBuffer.getBatch(TupleBuffer.java:305)
	at org.teiid.dqp.internal.process.RequestWorkItem.sendResultsIfNeeded(RequestWorkItem.java:782)
	at org.teiid.dqp.internal.process.RequestWorkItem.processMore(RequestWorkItem.java:462)
	at org.teiid.dqp.internal.process.RequestWorkItem.process(RequestWorkItem.java:320)
{code}


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