[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-951) setMaxResults causes "ORA-00918: column ambiguously defined" exception

[Andy Xie (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_29221 ] 

Andy Xie commented on HHH-951:
------------------------------

I meet this problem and solve it.
In my case, It happened if more many-to-one relation in the hbm file.
For example:
...
<class name=... />
   ...
   <subclass name="AClass" discriminator-value="8">
      ...
      <many-to-one name="column" column="columnId" class="CTable"/>
      ...
    </subclass>

   <subclass name="BClass" discriminator-value="8">
      ...
      <many-to-one name="column" column="columnid" class="CTable"/>
      ...
    </subclass>
   ...
</class>
...

Please notice the many-to-one section of the two subclass, the column of AClass is "columnId", it's uppercase, but the second is lowercase(columnid). Please modify the second to "columnId", hibernate will generate correct SQL that do not include duplicate column.

My environment is Hibernate 3.1 and Oracle 10g. 

> setMaxResults causes "ORA-00918: column ambiguously defined" exception 
> -----------------------------------------------------------------------
>
>                 Key: HHH-951
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-951
>             Project: Hibernate3
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 3.0.5, 3.1 beta 2
>         Environment: hibernate3.0.5, hibernate3.1b2, Oracle 9
>            Reporter: Karel Sommer
>
> when create criteria with associations, i get this error:
> ORA-00918: column ambiguously defined
> mapping:
>     <class name="User" table="FRAME_USER" dynamic-update="true" dynamic-insert="true">
>         <id name="id" type="long" unsaved-value="null">
>             <column name="ID" not-null="true"/>
>             <generator class="sequence">
>                 <param name="sequence">frame_user_seq</param>
>             </generator>
>         </id>
>         <version type="timestamp" column="stamp" name="timestamp" unsaved-value="null"/>
>         <property name="user_name" type="string" not-null="true"/>
>         <property name="blocked" type="yes_no" not-null="true"/>
>         <property name="access_logon" type="timestamp"/>
>         <property name="denied_logon" type="timestamp"/>
>         <property name="inactivity_time" type="long"/>
>         <property name="session_count" type="long"/>
>         <idbag name="terminalGroups" table="FRAME_USER_TERMINAL" fetch="join" outer-join="true">
>             <collection-id column="ID" type="long">
>                 <generator class="sequence">
>                     <param name="sequence">frame_user_terminal_seq</param>
>                 </generator>
>             </collection-id>
>             <key column="id_user"/>
>             <many-to-many column="id_terminal_groups" class="TerminalGroup" fetch="join" outer-join="true"/>
>         </idbag>
>     </class>
>     <class name="TerminalGroup" table="FRAME_TERMINAL_GROUPS" dynamic-update="true" dynamic-insert="true">
>         <id name="id" type="long" unsaved-value="null">
>             <column name="ID" not-null="true"/>
>             <generator class="sequence">
>                 <param name="sequence">frame_terminal_groups_seq</param>
>             </generator>
>         </id>
>         <version type="timestamp" column="stamp" name="timestamp" unsaved-value="null"/>
>         <property name="name" column="group_name" type="string" not-null="true"/>
>         <idbag name="terminals" table="FRAME_TERMINAL_REL" fetch="join" outer-join="true">
>             <collection-id column="ID" type="long" >
>                 <generator class="sequence">
>                     <param name="sequence">frame_terminal_rel_seq</param>
>                 </generator>
>             </collection-id>
>             <key column="id_term_group"/>
>             <many-to-many column="id_term" class="Terminal" fetch="join" outer-join="true"/>
>         </idbag>
>     </class>
>     <class name="Terminal" table="FRAME_TERMINAL" where="status != 'D'" dynamic-update="true" dynamic-insert="true">
>         <id name="id" type="long" unsaved-value="null">
>             <column name="ID" not-null="true"/>
>             <generator class="sequence">
>                 <param name="sequence">frame_terminal_seq</param>
>             </generator>
>         </id>
>         <version type="timestamp" column="stamp" name="timestamp" unsaved-value="null"/>
>         <property name="status" type="char" not-null="true"/>
>         <property name="mac" type="string" not-null="true"/>
>         <property name="name" column="ident" type="string" not-null="true"/>
>         <property name="description" type="string"/>
> code:
> session.createCriteria(User.class)
> 	.add(Restrictions.like("user_name", "%")
> 	.createCriteria("terminalGroups")
> 	        .add( Restrictions.like("group_name", "%").
> 	.setProjection(Projections.rowCount())
> .uniqueResult();

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