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mjdalangin
 Post subject: How to project specific columns using Native SQL
PostPosted: Fri Jul 13, 2007 1:47 am 
Newbie

Joined: Fri Jul 13, 2007 1:20 am
Posts: 2
Location: Makati City, Philippines
Need help with Hibernate? Read this first:
http://www.hibernate.org/ForumMailingli ... AskForHelp

Hibernate version:
version 3
Mapping documents:
xdoclet
Code between sessionFactory.openSession() and session.close():

Query query =sess.createSQLQuery("SELECT msg.id, msg.message, msg.receiverUserId FROM Messages msg, Users u WHERE receiverUserId = :receiverUserId").addEntity(Message.class).addEntity(User.class);
query.setString("receiverUserId", _userId.toString());
log.debug("*********the query********"+query.getQueryString());
for (Iterator i = query.list().iterator(); i.hasNext(); ) {
log.debug("****"+(Message)i.next());

}

Full stack trace of any exception that occurs:

2007-07-13 13:28:21,509 (org.hibernate.type.NullableType:132) 87004 INFO - could not read column value from result set: dateSent; The column name dateSent was not found in this ResultSet.
2007-07-13 13:28:21,537 (org.hibernate.util.JDBCExceptionReporter:71) 87032 WARN - SQL Error: 0, SQLState: 42703
2007-07-13 13:28:21,538 (org.hibernate.util.JDBCExceptionReporter:72) 87033 ERROR - The column name dateSent was not found in this ResultSet.
[13:28:21.579] org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.hibernate.exception.SQLGrammarException: could not execute query
[13:28:21.579] Caused by: org.hibernate.exception.SQLGrammarException: could not execute query
[13:28:21.579] at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:67)
[13:28:21.579] at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
[13:28:21.579] at org.hibernate.loader.Loader.doList(Loader.java:2148)
[13:28:21.579] at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029)
[13:28:21.579] at org.hibernate.loader.Loader.list(Loader.java:2024)
[13:28:21.579] at org.hibernate.loader.custom.CustomLoader.list(CustomLoader.java:111)
[13:28:21.579] at org.hibernate.impl.SessionImpl.listCustomQuery(SessionImpl.java:1655)
[13:28:21.579] at org.hibernate.impl.AbstractSessionImpl.list(AbstractSessionImpl.java:142)
[13:28:21.579] at org.hibernate.impl.SQLQueryImpl.list(SQLQueryImpl.java:164)
[13:28:21.579] at net.hoparound.repository.messages.hibernate.MessageDAOImpl.getAllMessagesReceivedByUserId(MessageDAOImpl.java:49)
[13:28:21.579] at net.hoparound.manager.messages.MessageManagerImpl.getAllMessagesReceivedByUserId(MessageManagerImpl.java:40)
[13:28:21.579] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[13:28:21.579] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
[13:28:21.579] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
[13:28:21.579] at java.lang.reflect.Method.invoke(Method.java:585)
[13:28:21.579] at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:318)
[13:28:21.579] at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:198)
[13:28:21.579] at $Proxy17.getAllMessagesReceivedByUserId(Unknown Source)
[13:28:21.579] at net.hoparound.facade.messages.MessageFacade.getAllMessagesReceivedByUserId(MessageFacade.java:59)
[13:28:21.579] at net.hoparound.web.message.InboxController.referenceData(InboxController.java:62)
[13:28:21.579] at org.springframework.web.servlet.mvc.AbstractFormController.showForm(AbstractFormController.java:557)
[13:28:21.579] at org.springframework.web.servlet.mvc.SimpleFormController.showForm(SimpleFormController.java:193)
[13:28:21.579] at org.springframework.web.servlet.mvc.SimpleFormController.showForm(SimpleFormController.java:172)
[13:28:21.579] at org.springframework.web.servlet.mvc.AbstractFormController.showNewForm(AbstractFormController.java:323)
[13:28:21.579] at org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInternal(AbstractFormController.java:263)
[13:28:21.579] at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
[13:28:21.579] at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:45)
[13:28:21.579] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:806)
[13:28:21.579] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:736)
[13:28:21.579] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:396)
[13:28:21.579] at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:350)
[13:28:21.579] at javax.servlet.http.HttpServlet.service(HttpServlet.java:115)
[13:28:21.579] at javax.servlet.http.HttpServlet.service(HttpServlet.java:92)
[13:28:21.579] at com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:103)
[13:28:21.579] at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:264)
[13:28:21.579] at org.acegisecurity.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:107)
[13:28:21.579] at org.acegisecurity.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:72)
[13:28:21.579] at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)
[13:28:21.579] at org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:110)
[13:28:21.579] at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)
[13:28:21.579] at org.acegisecurity.wrapper.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:81)
[13:28:21.579] at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)
[13:28:21.579] at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:217)
[13:28:21.579] at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)
[13:28:21.579] at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:193)
[13:28:21.579] at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)
[13:28:21.579] at org.acegisecurity.util.FilterChainProxy.doFilter(FilterChainProxy.java:148)
[13:28:21.579] at org.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:98)
[13:28:21.579] at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:73)
[13:28:21.579] at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:167)
[13:28:21.579] at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:226)
[13:28:21.579] at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:263)
[13:28:21.579] at com.caucho.server.port.TcpConnection.run(TcpConnection.java:477)
[13:28:21.579] at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:591)
[13:28:21.579] at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:513)
[13:28:21.579] at java.lang.Thread.run(Thread.java:595)
[13:28:21.579] Caused by: org.postgresql.util.PSQLException: The column name dateSent was not found in this ResultSet.
[13:28:21.579] at org.postgresql.jdbc2.AbstractJdbc2ResultSet.findColumn(AbstractJdbc2ResultSet.java:2365)
[13:28:21.579] at org.postgresql.jdbc2.AbstractJdbc2ResultSet.getTimestamp(AbstractJdbc2ResultSet.java:2248)
[13:28:21.579] at org.hibernate.type.TimestampType.get(TimestampType.java:30)
[13:28:21.579] at org.hibernate.type.NullableType.nullSafeGet(NullableType.java:113)
[13:28:21.579] at org.hibernate.type.NullableType.nullSafeGet(NullableType.java:102)
[13:28:21.579] at org.hibernate.type.AbstractType.hydrate(AbstractType.java:81)
[13:28:21.579] at org.hibernate.persister.entity.AbstractEntityPersister.hydrate(AbstractEntityPersister.java:1899)
[13:28:21.579] at org.hibernate.loader.Loader.loadFromResultSet(Loader.java:1372)
[13:28:21.579] at org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1300)
[13:28:21.579] at org.hibernate.loader.Loader.getRow(Loader.java:1197)
[13:28:21.579] at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:569)
[13:28:21.579] at org.hibernate.loader.Loader.doQuery(Loader.java:689)
[13:28:21.579] at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
[13:28:21.579] at org.hibernate.loader.Loader.doList(Loader.java:2145)
[13:28:21.579] ... 53 more
[13:28:22.203] Closing dangling connections. All connections must have a close() in a finally block.
[13:28:22.204] java.lang.IllegalStateException: Connection UserConnection[com.caucho.sql.ManagedConnectionImpl@6e1f8f] was not closed. Connections must have a close() in a finally block.
[13:28:22.204] at com.caucho.jca.UserTransactionImpl.abortTransaction(UserTransactionImpl.java:490)
[13:28:22.204] at com.caucho.jca.UserTransactionProxy.abortTransaction(UserTransactionProxy.java:182)
[13:28:22.204] at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:187)
[13:28:22.204] at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:226)
[13:28:22.204] at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:263)
[13:28:22.204] at com.caucho.server.port.TcpConnection.run(TcpConnection.java:477)
[13:28:22.204] at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:591)
[13:28:22.204] at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:513)
[13:28:22.204] at java.lang.Thread.run(Thread.java:595)


Name and version of the database you are using:
PostgreSQL 8.1.8
The generated SQL (show_sql=true):

SELECT msg.id, msg.message, msg.receiverUserId FROM Messages msg, Users u WHERE receiverUserId = :receiverUserId

Debug level Hibernate log excerpt:


Problems with Session and transaction handling?

I have a Messages table on which i would only like to query specific fields.
Whenever I use addScalar to filter the projection the result will just be plain array of Objects not an Object of my domain which is 'Message'. So I tried extracting the columns by specifying them on my query [msg.id, msg.receiverUserId .. .] but every time i run the code it keeps on finding the next column and the error won't end unless i use * to retrieve all columns.which i dont like doing since loading time will suffer if i do that.

i also tried using the Projection interface but it returns the exact records in the database not the Object of my Message domain.
Pls help me....


Read this: http://hibernate.org/42.html
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 Profile  
 
amila733
 Post subject:
PostPosted: Fri Jul 13, 2007 2:46 am 
Senior
Senior

Joined: Thu May 17, 2007 2:31 am
Posts: 194
Location: Sri Lanka
Hi

use createCriteria()

and

setResultTransformer()

I don't see anything related to Users u in your sql query.
if you send correct querry i can code it.

for given query try this.

Code:
List list=session.createCriteria(Messages.class,"msg")
             .setProjection(Projections.projectionList()
                   .add(Projections.property("msg.id"),"id")
                   .add(Projections.property("msg.message"),"message")
                   .add(Projections.property("msg.receiverUserId"),"receiverUserId")
              )
              .add(Restrictions.eq("msg.receiverUserId",_userId.toString()))
              .setResultTransformer(new AliasToBeanResultTransformer(Messages.class))
.list();



Amila

(Don't forget to rate if helps)
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 Profile  
 
mjdalangin
 Post subject:
PostPosted: Fri Jul 13, 2007 3:47 am 
Newbie

Joined: Fri Jul 13, 2007 1:20 am
Posts: 2
Location: Makati City, Philippines
That's great! Thanks so much!
By the way I just experimented with my query that's why User was there.
I also experimented with setCriteria and Projection but i use the wrong transformer (.setResultTransformer(Criteria.ALIAS_TO_ENTITY_MAP)) :(
AliasToBeanResultTransformer solves it.

Thanks! alot for helping me out :)
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