[teiid-issues] [JBoss JIRA] (TEIID-5845) NullPointerException when running query

[Alexandra Gaspar (Jira)]

Alexandra Gaspar created TEIID-5845:
---------------------------------------

             Summary: NullPointerException when running query
                 Key: TEIID-5845
                 URL: https://issues.jboss.org/browse/TEIID-5845
             Project: Teiid
          Issue Type: Bug
            Reporter: Alexandra Gaspar
            Assignee: Steven Hawkins


Running a query of the following format causes a NullPointerException :
{code:java}
SELECT col1, col2, col3
FROM TeiidView1
WHERE col2 = 'value'
GROUP BY col1
ORDER BY NVL(col3, 0) DESC
{code}
 
If adding adding a limit at the end of the query, it runs successfully. Similarly, removing the `NVL` function also results in the query returning results without any errors. 

This is the stack trace:
{noformat}
TEIID30019 Unexpected exception for request b+HUTj++9EfY.0: java.lang.NullPointerException
	at org.teiid.query.optimizer.relational.rules.RulePlanSorts.checkForProjectOptimization(RulePlanSorts.java:333) [teiid-engine-9.1.5.jar:9.1.5]
	at org.teiid.query.optimizer.relational.rules.RulePlanSorts.optimizeSorts(RulePlanSorts.java:91) [teiid-engine-9.1.5.jar:9.1.5]
	at org.teiid.query.optimizer.relational.rules.RulePlanSorts.execute(RulePlanSorts.java:69) [teiid-engine-9.1.5.jar:9.1.5]
	at org.teiid.query.optimizer.relational.RelationalPlanner.executeRules(RelationalPlanner.java:1007) [teiid-engine-9.1.5.jar:9.1.5]
	at org.teiid.query.optimizer.relational.RelationalPlanner.optimize(RelationalPlanner.java:232) [teiid-engine-9.1.5.jar:9.1.5]
	at org.teiid.query.optimizer.QueryOptimizer.optimizePlan(QueryOptimizer.java:186) [teiid-engine-9.1.5.jar:9.1.5]
	at org.teiid.dqp.internal.process.Request.generatePlan(Request.java:453) [teiid-engine-9.1.5.jar:9.1.5]
	at org.teiid.dqp.internal.process.Request.processRequest(Request.java:481) [teiid-engine-9.1.5.jar:9.1.5]
	at org.teiid.dqp.internal.process.RequestWorkItem.processNew(RequestWorkItem.java:657) [teiid-engine-9.1.5.jar:9.1.5]
	at org.teiid.dqp.internal.process.RequestWorkItem.process(RequestWorkItem.java:338) [teiid-engine-9.1.5.jar:9.1.5]
	at org.teiid.dqp.internal.process.AbstractWorkItem.run(AbstractWorkItem.java:51) [teiid-engine-9.1.5.jar:9.1.5]
	at org.teiid.dqp.internal.process.RequestWorkItem.run(RequestWorkItem.java:275) [teiid-engine-9.1.5.jar:9.1.5]
	at org.teiid.dqp.internal.process.DQPWorkContext.runInContext(DQPWorkContext.java:282) [teiid-engine-9.1.5.jar:9.1.5]
	at org.teiid.dqp.internal.process.ThreadReuseExecutor$RunnableWrapper.run(ThreadReuseExecutor.java:119) [teiid-engine-9.1.5.jar:9.1.5]
	at org.teiid.dqp.internal.process.ThreadReuseExecutor$3.run(ThreadReuseExecutor.java:210) [teiid-engine-9.1.5.jar:9.1.5]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [rt.jar:1.8.0_181]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [rt.jar:1.8.0_181]
	at java.lang.Thread.run(Thread.java:748) [rt.jar:1.8.0_181]
{noformat}



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