[hibernate-issues] [Hibernate-JIRA] Created: (HHH-4700) ClassCastException with parameter in CaseNode.getFirstThenNode()

[Jean-Baptiste Mille (JIRA)]

ClassCastException with parameter in CaseNode.getFirstThenNode()
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                 Key: HHH-4700
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-4700
             Project: Hibernate Core
          Issue Type: Bug
          Components: query-hql
    Affects Versions: 3.3.2, 3.3.1, 3.3.0.SP1, 3.3.0.GA, 3.3.0.CR2, 3.3.0.CR1, 3.2.7, 3.2.6, 3.2.5, 3.2.4.sp1, 3.2.4, 3.2.3, 3.2.2, 3.2.1, 3.2.0.ga, 3.2.0.cr5, 3.2.0.cr4, 3.2.0.cr3, 3.2.0.cr2, 3.2.0 cr1
         Environment: Hibernate 3.3.2.ga
            Reporter: Jean-Baptiste Mille
            Priority: Minor
         Attachments: testcase.zip

Hql query with CASE .. WHEN and parameter in THEN clause throws a classCastException.
Example :

{code}
UPDATE MyObject SET myProperty = CASE WHEN myFilterProperty like 'L%' THEN :new_value END
{code}

Exception
java.lang.ClassCastException: org.hibernate.hql.ast.tree.ParameterNode cannot be cast to org.hibernate.hql.ast.tree.SelectExpression
	at org.hibernate.hql.ast.tree.CaseNode.getFirstThenNode(CaseNode.java:44)
	at org.hibernate.hql.ast.tree.CaseNode.getDataType(CaseNode.java:40)
	at org.hibernate.hql.ast.tree.BinaryLogicOperatorNode.extractDataType(BinaryLogicOperatorNode.java:210)
	at org.hibernate.hql.ast.tree.BinaryLogicOperatorNode.initialize(BinaryLogicOperatorNode.java:58)
	at org.hibernate.hql.ast.HqlSqlWalker.prepareLogicOperator(HqlSqlWalker.java:1133)
	at org.hibernate.hql.ast.HqlSqlWalker.evaluateAssignment(HqlSqlWalker.java:1043)
	at org.hibernate.hql.antlr.HqlSqlBaseWalker.assignment(HqlSqlBaseWalker.java:1086)
	at org.hibernate.hql.antlr.HqlSqlBaseWalker.setClause(HqlSqlBaseWalker.java:766)
	at org.hibernate.hql.antlr.HqlSqlBaseWalker.updateStatement(HqlSqlBaseWalker.java:361)
	at org.hibernate.hql.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:239)
	at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:254)
	at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:185)
	at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:136)
	at com.bnpparibas.eqd.DMLCaseTest.runQuery(DMLCaseTest.java:67)
	at com.bnpparibas.eqd.DMLCaseTest.doesntWork(DMLCaseTest.java:35)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:59)
	at org.junit.internal.runners.MethodRoadie.runTestMethod(MethodRoadie.java:98)
	at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:79)
	at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:87)
	at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:77)
	at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:42)
	at org.junit.internal.runners.JUnit4ClassRunner.invokeTestMethod(JUnit4ClassRunner.java:88)
	at org.junit.internal.runners.JUnit4ClassRunner.runMethods(JUnit4ClassRunner.java:51)
	at org.junit.internal.runners.JUnit4ClassRunner$1.run(JUnit4ClassRunner.java:44)
	at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:27)
	at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:37)
	at org.junit.internal.runners.JUnit4ClassRunner.run(JUnit4ClassRunner.java:42)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:46)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

This issue have been [posted in user forum|https://forum.hibernate.org/viewtopic.php?f=1&t=981196&p=2369061&hilit=classcastexception+getFirstThenNode#p2369061].

It works with Hibernate 3.1.3.

A test case (designed for Hibernate 3.3.2.ga) which illustrate this issue is attached. 


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