[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-817) Aggregate projection aliases should not be applied to where-clause

[Ittai Zeidman (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-817?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_28925 ] 

Ittai Zeidman commented on HHH-817:
-----------------------------------

Hi,
this bug needs to be changed to 'Critical' as when using mapped entities you need to use the criteria.setResultTransformer(CriteriaSpecification.ALIAS_TO_ENTITY_MAP) method to recieve the pojo's data back in a hashmap. the 'CriteriaSpecification.ALIAS_TO_ENTITY_MAP' implementation only converts the properties with aliases to the hashmap, a behavior i think is a different bug. Seeing as this is the only way to get into the hash the required property you have to 'choose' between using the property in the select clause or in the where clause. this is definitely a critical problem.
Thanks

> Aggregate projection aliases should not be applied to where-clause
> ------------------------------------------------------------------
>
>                 Key: HHH-817
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-817
>             Project: Hibernate3
>          Issue Type: Bug
>          Components: core
>    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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