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<td class="page-title-pattern-first-line " style="padding: 0; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://hibernate.atlassian.net/browse/HHH" style="color: #3b73af; text-decoration: none">Hibernate ORM</a> / <a href="https://hibernate.atlassian.net/browse/HHH-10932" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-66611468-1e2e-454d-964c-d8f80636f97a" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-10932" style="color: #3b73af; text-decoration: none">HHH-10932</a> </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="IgorBobko" id="email_IgorBobko" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=IgorBobko" style="color:#6c797f;; color: #3b73af; text-decoration: none">Igor Bobko</a> </td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"> <span class="diffcontext">Suppose, we have 3 entities<br><br>{code:xml}<br><hibernate-mapping><br> <class name="AEntity" table="A" abstract="true"><br> <id name="id" column="ID"/><br><br> <joined-subclass table="Aa" name="AaEntity"><br> <key column="key"/><br> <many-to-one name="b" class="BEntity" column="B_ID"/><br> </joined-subclass><br><br> <joined-subclass table="Ab" name="AbEntity"><br> <key column="key"/><br> <many-to-one name="b" class="BEntity" column="B_ID"/><br> </joined-subclass><br> </class><br></hibernate-mapping><br>{code}<br>{code:xml}<br><hibernate-mapping><br> <class name="Parent" table="parent"><br> <id name="id"</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">><br> <</span> <span class="diffcontext">column</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> name</span> <span class="diffcontext">="ID"/><br> <</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">/id><br> <</span> <span class="diffcontext">many-to-one name="a" class="AEntity"</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">><br> <</span> <span class="diffcontext">column</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> name</span> <span class="diffcontext">="a_ID" /><br> </</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">many-to-one><br> </</span> <span class="diffcontext">class><br></hibernate-mapping><br>{code}<br>{code:xml}<br><hibernate-mapping><br> <class name="BEntity" table="B"><br> <id name="id"</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">><br> <</span> <span class="diffcontext">column</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> name</span> <span class="diffcontext">="ID"/><br> </</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">id><br> </</span> <span class="diffcontext">class><br></hibernate-mapping><br>{code}<br><br>Then, we make criteria request<br>{code:java}<br>Criteria criteria = session.createCriteria(Parent.class);<br>criteria.createAlias("a","a");<br>criteria.createAlias("a.b","b");<br>criteria.list();<br>{code}<br>And get next sql<br>{code:sql}<br>select this_.ID as ID1_5_3_,<br> this_.a_ID as a2_5_3_,<br> a1_.ID as ID1_2_0_,<br> a1_.B_ID as B2_2_0_,<br> a1_1_.B_ID as B2_0_0_,<br> a1_2_.B_ID as B2_1_0_,<br> case when a1_1_.key is not null then 1 when a1_2_.key is not null then 2 when a1_.ID is not null then 0 end as clazz_0_,<br> b2_.ID as ID1_3_1_,<br> b2_.C_ID as C2_3_1_,<br> b2_.ID as ID1_3_2_,<br> b2_.C_ID as C2_3_2_<br>from parent this_<br>inner join A a1_ on this_.a_ID=a1_.ID<br>left outer join Aa a1_1_ on a1_.ID=a1_1_.key<br>left outer join Ab a1_2_ on a1_.ID=a1_2_.key<br>inner join B b2_ on a1_1_.B_ID=b2_.ID<br>inner join B b2_ on a1_2_.B_ID=b2_.ID<br>{code}<br>We can see that</span> <span class="diffaddedchars" style="background-color:#ddfade;"> "</span> <span class="diffcontext"> B</span> <span class="diffaddedchars" style="background-color:#ddfade;">"</span> <span class="diffcontext"> table joins two times and have same</span> <span class="diffaddedchars" style="background-color:#ddfade;"> alias</span> <span class="diffcontext"> name</span> <span class="diffaddedchars" style="background-color:#ddfade;"> "</span> <span class="diffcontext"> b2_</span> <span class="diffaddedchars" style="background-color:#ddfade;">"</span> <span class="diffcontext">. Is it bug? And how make two joins but with different name of B table. Okay?</span> </td>
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