[hibernate-issues] [Hibernate-JIRA] Created: (HHH-5074) Criteria query using AliasToBeanResultTransformer fails with 3.5-Final

[Florian Grote (JIRA)]

Criteria query using AliasToBeanResultTransformer fails with 3.5-Final
----------------------------------------------------------------------

                 Key: HHH-5074
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5074
             Project: Hibernate Core
          Issue Type: Bug
          Components: core, query-criteria, query-sql
    Affects Versions: 3.5.0-Final
         Environment: Hibernate 3.5-Final,
Database: MySQL 5.1.45 GA,
JDBC: mysql-connector-java-5.1.12

            Reporter: Florian Grote


I use the following Criteria query to receive the top ten users for an attribute "scoreSum". Attribute "statistic" is an embedded child (@Embeddable) of "User" entity.
The result is written directly into a value object using AliasToBeanResultTransformer.

{code:title=Criteria query|borderStyle=solid}
@SuppressWarnings("unchecked")
@Override
public List<TopUserVO> getTopUsersAsVO(int max) {
  return getCurrentSession().createCriteria(User.class)
    .setProjection(Projections.projectionList()
      .add( Projections.property("username"), "username" )
      .add( Projections.property("statistic.scoreSum"), "scores" )
  )
  .addOrder(Property.forName("statistic.scoreSum").desc())
  .setMaxResults(max)
  .setResultTransformer( new AliasToBeanResultTransformer(TopUserVO.class) )
  .list();
}
{code}

Until inclusive Hibernate version 3.5-CR2 this runs fine and results in the valid (My-)SQL query:
{quote}
select 
this_.USERNAME as y0_, 
this_.SCORE_SUM as y1_ 
from USER this_ 
order by this_.SCORE_SUM desc limit ?
{quote} 

After upgrading to Hibernate version 3.5-final the same query fails because SQL query is not created correctly anymore. Corrupted SQL:
{quote} 
select 
{color:red}*y0_ as y0_,*{color} 
this_.SCORE_SUM as y1_
from USER this_
order by this_.SCORE_SUM desc
{quote} 

Problem is that "y0_" is used twice, instead of using it only as alias: "this_.USERNAME as y0_".
Here is the relevant part of the root stacktrace:

{code:title=Root Exception}
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'y0_' in 'field list'
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
	at com.mysql.jdbc.Util.handleNewInstance(Util.java:409)
	at com.mysql.jdbc.Util.getInstance(Util.java:384)
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1054)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3562)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3494)
	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1960)
	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2114)
	at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2696)
	at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2105)
	at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2264)
	at org.jboss.resource.adapter.jdbc.WrappedPreparedStatement.executeQuery(WrappedPreparedStatement.java:342)
	at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:208)
	at org.hibernate.loader.Loader.getResultSet(Loader.java:1849)
	at org.hibernate.loader.Loader.doQuery(Loader.java:718)
	at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:270)
	at org.hibernate.loader.Loader.doList(Loader.java:2294)
	at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2172)
	at org.hibernate.loader.Loader.list(Loader.java:2167)
	at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:119)
	at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1706)
	at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:347)
	at xyz.dao.UserDaoImpl.getTopUsersAsVO(UserDaoImpl.java:95)
{code}

I will try to research the new Hibernate code and the difference to the old one and try to provide a patch.



-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: http://opensource.atlassian.com/projects/hibernate/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira