Exception when having different class and table name

[Gurpreet Singh]

Hi,

I am getting an exception when I try to map a class name with different table name in hibernate .hbm.xml mapping file. However I don't get the exception when the class name and table name are same.

I am calling the following method in DAO Implementation :

myClassObject=(MyClass)getHibernateTemplate().get(MyClass.class,Integer.valueOf(id));

and getting the following exception :

Please help.


12:22:12,250 INFO [DefaultLoadEventListener] Error performing load command
org.hibernate.exception.SQLGrammarException: could not load an entity: [com.abc.common.model.valueobject.MyClass#1001]
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:67)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.loader.Loader.loadEntity(Loader.java:1799)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:48)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:42)
at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:2821)
at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:370)
at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:351)
at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:122)
at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:178)
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:86)
at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:871)
at org.hibernate.impl.SessionImpl.get(SessionImpl.java:808)
at org.hibernate.impl.SessionImpl.get(SessionImpl.java:801)
at org.springframework.orm.hibernate3.HibernateTemplate$1.doInHibernate(HibernateTemplate.java:458)
at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366)
at org.springframework.orm.hibernate3.HibernateTemplate.get(HibernateTemplate.java:452)
at org.springframework.orm.hibernate3.HibernateTemplate.get(HibernateTemplate.java:446)
at com.abc.common.persistance.dao.hibernate.impl.MyClassDAOImpl.getMyClassData(MyClassDAOImpl.java:31)
at com.abc.common.service.impl.MyClassServiceImpl.getMyClassData(MyClassServiceImpl.java:24)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:266)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:181)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:148)
at org.springframework.aop.aspectj.AspectJAfterThrowingAdvice.invoke(AspectJAfterThrowingAdvice.java:51)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:170)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:95)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:170)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:176)
at $Proxy9.getMyClassData(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:266)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:165)
at $Proxy20.getMyClassData(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:266)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:181)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:148)
at org.springframework.aop.aspectj.AspectJAfterThrowingAdvice.invoke(AspectJAfterThrowingAdvice.java:51)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:170)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:95)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:170)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:176)
at $Proxy20.getMyClassData(Unknown Source)
at com.abc.common.service.impl.MyClassServiceTest.testGetMyClass(MyClassServiceTest.java:73)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at junit.framework.TestCase.runTest(TestCase.java:154)
at junit.framework.TestCase.runBare(TestCase.java:127)
at org.springframework.test.ConditionalTestCase.runBare(ConditionalTestCase.java:69)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:118)
at junit.framework.TestSuite.runTest(TestSuite.java:208)
at junit.framework.TestSuite.run(TestSuite.java:203)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:478)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:344)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.sql.SQLException: ORA-00942: table or view does not exist

at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:331)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:288)
at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:743)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:213)
at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:796)
at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:1031)
at oracle.jdbc.driver.T4CPreparedStatement.executeMaybeDescribe(T4CPreparedStatement.java:836)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1124)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3285)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3329)
at org.apache.commons.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:92)
at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:186)
at org.hibernate.loader.Loader.getResultSet(Loader.java:1669)
at org.hibernate.loader.Loader.doQuery(Loader.java:662)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
at org.hibernate.loader.Loader.loadEntity(Loader.java:1785)

[Paul Sturrock]

Caused by: java.sql.SQLException: ORA-00942: table or view does not exist

According to Oracle, you are mapping a table that does not exist. Does it exist?

[Gurpreet Singh]

Yup, the table DOES exists in the database.

[Paul Sturrock]

Ok... Can you post your MyClass mapping file?
[ January 11, 2007: Message edited by: Paul Sturrock ]

[Gurpreet Singh]

The two .hbm files, MyClass.hbm.xml and MyClassDetails.hbm.xml are given below. When I change the table name to MYCLASS instead of CONFLOOKUP and MYCLASSDETAILS instead of CONFLOOKUPDETAIL, everything works fine.

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.abc.common.model.valueobject.MyClass" table="CONFLOOKUP">
<id name="id" type="int" column="ID" length="10">
<generator class="assigned" />
</id>
<property name="lookupType" type="java.lang.String" column="LOOKUPTYPE" length="200" />
 
<set name="lookupDetails" lazy="false">
<key>
<column name="LOOKUPID"/>
</key>
<one-to-many class="com.abc.common.model.valueobject.MyClassDetails"/>
</set>
</class>
</hibernate-mapping>
 
 

 
 
 
 
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.abc.common.model.valueobject.MyClassDeta ils" table="CONFLOOKUPDETAIL">
<id name="id" type="int" column="ID" length="10">
<generator class="assigned" />
</id>
<property name="lookupId" type="int" column="LOOKUPID" length="10" />
<property name="key" type="java.lang.String" column="KEY" length="200" />
<property name="value" type="java.lang.String" column="VALUE" length="200" />
<many-to-one name="lookUpData" class="com.abc.common.model.valueobject.MyClass" insert="false" update="false">
<column name="LOOKUPID"/>
</many-to-one>
</class>
</hibernate-mapping>
 

Reply With Quote

[ Edited to use code tags - Paul Sturrock ]
[ January 11, 2007: Message edited by: Paul Sturrock ]

[Paul Sturrock]

Hmm. Those are fairly uncontroversial mapping files. My guess would be it's not necessarily a Hibernate configuration issue but perhaps an Oracle one. When you say the table exists in Oracle does it exist in a way that the user your application connects with has access to? Is it part of the same schema as your MYCLASS table for instance?

[Gurpreet Singh]

Thankx Paul Sturrock. The problem is solved.

Actually, the database at my end, i.e. my local database was somehow corrupt. I tried the same thing on another machine and everything worked perfectly. Then I dropped all tables in my database and created fresh tables and everything was working fine, I was able to get the values in DAO without any exception.

Thank you again for the quick replies and help.