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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-11979" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-9e3a9574-1d3d-4a04-a3b3-42c14420a22a" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-11979" style="color: #3b73af; text-decoration: none">HHH-11979</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-11979" style="color: #3b73af; text-decoration: none">Invalid SQL when force increment version of inherited entity</a> </span> </td>
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<td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-avatar-9e3a9574-1d3d-4a04-a3b3-42c14420a22a" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"> Bug </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"> 5.2.10 </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Created:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 10/Sep/2017 01:22 AM </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"> inheritance locks sql </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="stiekemaj" id="email_stiekemaj" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=stiekemaj" style="color:#6c797f;; color: #3b73af; text-decoration: none">Jeroen Stiekema</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"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0; margin-top: 0">Situation: I have an entity class Employee which is a subclass of the abstract entity class Person. The inheritance strategy is of type <em>joined</em>. In our project we use the convention that the primary key column name of each database table is $</p> {entityName} <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">_ID. </p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">To do some calculations on employee related details, I need to put a read/write lock on the employee entity, te ensure that the calculation is not executed based on stale data.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">So, when I try to put a lock on the employee entity instance by calling entityManager.lock(employee, LockModeType.OPTIMISTIC_FORCE_INCREMENT), I get a JdbcSQLException when the entityManager is flushing it's state to the database:</p>
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<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
javax.persistence.RollbackException: Error <span class="code-keyword" style="color: #000091">while</span> committing the transaction
...
...
Caused by: org.h2.jdbc.JdbcSQLException: Column <span class="code-quote" style="color: #009100">"EMPLOYEE_ID"</span> not found; SQL statement:
update Person set version=? where EMPLOYEE_ID=? and version=? [42122-176]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:344)
...
</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">As you can see in the exception details, the wrong id column is used in the update predicate. Instead, it should generate the following query:</p>
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<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
UPDATE PERSON SET VERSION = ? WHERE PERSON_ID = ? AND VERSION = ?
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">I've managed to reproduce the bug in a hibernate test case. I will update this issue with additional details after I've pushed the test case.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">I think I've found the cause of this bug in the hibernate sources. It seems like the generateVersionIncrementUpdateString() method in org.hibernate.persister.entity.AbstractEntityPersister generates invalid update statements when a version increment is applied to an @Inheritance annotated entity. In that case, an instance of JoinedSubclassEntityPersister is used to generate this update statement. The table name of the table which holds the version column is retrieved by invoking getTableName(0), which returns the first table name of the inheritance natural order list. On the other hand, the identifier column names are retrieved by invoking getIdentifierColumnNames(), which returns the first key columns entry of the array holding the inheritance <em>reversed</em> order list. </p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">My assumption is that the identifier column names (name*s*, because the identifier of the table can be composite key) should be retrieved by invoking getKeyColumns(0), which returns the first entry of the naturalOrderTableKeyColumns array.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">I'm also a bit in doubt if I haven't done something wrong, because it's very strange there is no other report of this issue. Maybe it's because the combination of joined inheritance, primary key column names which deviates from the main id name convention (which is 'id') and explicit locking isn't used that much?</p> </td>
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