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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-12492" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-db5d4e86-c1e5-47a7-b8de-19efd3a6669b" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-12492" style="color: #3b73af; text-decoration: none">HHH-12492</a> </td>
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<td style="vertical-align: top;; padding: 0; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://hibernate.atlassian.net/browse/HHH-12492" style="color: #3b73af; text-decoration: none">Jpa DELETE Query generated has missing table alias and thus incorrect semantics </a> </span> </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="romanstumm" id="email_romanstumm" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=romanstumm" style="color:#6c797f;; color: #3b73af; text-decoration: none">Roman Stumm</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">2 Entities, both with a primary key named id as <br><br>{{<br>class Key implements Serializable {<br> String pre<br> long id<br>}<br><br>Entity 1: IT<br><br>class IT extends AbstractPersistable<Key> {<br> // etc.<br>}<br><br>Entity 2: PT with ManyToOne ForeignKey To IT<br>class PT extends AbstractPersistable<Key> {<br> @ManyToOne(optional = false)<br> IT it<br>}<br>}}<br><br>The DAO method with a @Query for deletion generates the wrong SQL because the join at the end of the statement does not contain the alias or table name of the target table.<br><br>Example:<br><br>{</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">{</span> <span class="diffaddedchars" style="background-color:#ddfade;">noformat}</span> <span class="diffcontext"><br>interface ITDao extends JpaRepository<IT, Key> {<br> @Modifying<br> @Query("delete from IT i where not exists (select p from PT p where p.it = i)")<br> int deleteUnreferenced()<br>}<br></span> <span class="diffaddedchars" style="background-color:#ddfade;">{noformat</span> <span class="diffcontext">}</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">}</span> <span class="diffcontext"><br><br></span> <span class="diffaddedchars" style="background-color:#ddfade;"><br></span> <span class="diffcontext">SQL generated by Hibernate is: <br>delete from IT where not (exists (select (pt1_.id, pt1_.pre) from PT pt1_ where (pt1_.it_id, pt1_.it_pre)=(id, pre))<br><br>because "(id, pre)" does not have any alias or table name, the statement does not join wiht IT but with PT which is wrong.<br><br>SQL generated should be:<br>delete from IT where not (exists (select (pt1_.id, pt1_.pre) from PT pt1_ where (pt1_.it_id, pt1_.it_pre)=(IT.id, IT.pre))<br><br>or it could be:<br>delete from IT i where not (exists (select (pt1_.id, pt1_.pre) from PT pt1_ where (pt1_.it_id, pt1_.it_pre)=(i.id, i.pre))<br><br>Or am I missing something?<br><br><br><br><br></span> </td>
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