9:21 a.m.
[
http://opensource.atlassian.com/projects/hibernate/browse/HHH-817?page=co...
]
Bryan Stopp commented on HHH-817:
---------------------------------
I would like to add that DB2 doesn't support it either.
Also, a note on the workaround. You should only prefix the alias for those columns that
are associated with the main table in the query. I found that when adding a prefix to a
child table along an association path, an exception was thrown stating that it could not
find the associated property.
Removing the alias on child table elements allowed me to prevent the use of the alias in
the WHERE clause, as well as properly utilize a ResultTransformer.
My 2 cents.
-B
using projections is causing SQL query error on oracle (ORA-00904
error)
------------------------------------------------------------------------
Key: HHH-817
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-817
Project: Hibernate3
Issue Type: Bug
Affects Versions: 3.0.5
Environment: Oracle 9.2.0.6, Hibernate 3.0.5, Spring Framework 1.2.2 based
application working on Jakarta Tomcat 5.0.28
Reporter: Michal Jastak
Priority: Minor
Attachments: HHH-817.patch
following java code:
protected Entity loadEntityLightweight(Serializable entityId) throws DataAccessException
{
Criteria criteria = getSession().createCriteria(Entity.class);
ProjectionList projectionList = Projections.projectionList();
projectionList.add(Property.forName(BaseEntity.PROP_ID), BaseEntity.PROP_ID);
projectionList.add(Property.forName(BaseEntity.PROP_TYPE), BaseEntity.PROP_TYPE);
criteria.setProjection(projectionList);
criteria.add(Restrictions.eq(BaseEntity.PROP_ID, entityId));
criteria.setResultTransformer(new AliasToBeanResultTransformer(Entity.class));
return (Entity) criteria.uniqueResult();
}
generates following SQL query:
select this_.id as y0_, this_.type as y1_ from entities this_ left outer join facilities
this_1_ on this_.id=this_1_.id left outer join users this_2_ on this_.id=this_2_.id left
outer join addresses address2_ on this_.address_id=address2_.id left outer join entities
entity3_ on this_2_.employer_id=entity3_.id left outer join facilities entity3_1_ on
entity3_.id=entity3_1_.id left outer join users entity3_2_ on entity3_.id=entity3_2_.id
where y0_=?
y0_ = ? expression in where clause is causing a 904 error on Oracle 9:
ORA-00904: "Y0_": invalid identifier
hibernate dialect: org.hibernate.dialect.Oracle9Dialect
mapping for Entity class:
<?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 default-lazy="false"
default-cascade="save-update">
<class name="Entity" table="entities"
mutable="true">
<id name="id" type="java.lang.Long"
unsaved-value="null">
<generator class="sequence">
<param name="sequence">entities_id_seq</param>
</generator>
</id>
<many-to-one name="address" class="Address"
column="address_id" />
...
<!--
- Facilities
-->
<joined-subclass name="Facility" table="facilities">
<key column="id" />
...
<set name="users" inverse="true" lazy="true">
<key column="facility_id" />
<one-to-many class="User" />
</set>
</joined-subclass>
<!--
- Users
-->
<joined-subclass name="User" table="users"
dynamic-insert="true" dynamic-update="true">
<key column="id" />
<many-to-one name="employer" class="Entity"
column="employer_id" cascade="none" />
...
<set name="userAuthorities" inverse="true"
cascade="all-delete-orphan">
<key column="user_id" />
<one-to-many class="Authority" />
</set>
</joined-subclass>
</class>
</hibernate-mapping>
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