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<a class="user-hover" rel="gwenael" id="email_gwenael" href="https://hibernate.onjira.com/secure/ViewProfile.jspa?name=gwenael" style="color:#6c797f;">Gueheneuc</a>
created <img src="https://hibernate.onjira.com/images/icons/bug.gif" height="16" width="16" border="0" align="absmiddle" alt="Bug"> <a style='color:#6c797f;text-decoration:none;' href='https://hibernate.onjira.com/browse/HHH-7536'>HHH-7536</a>
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<a style='color:#6c797f;text-decoration:none;' href='https://hibernate.onjira.com/browse/HHH-7536'><strong>No option to sort the delete sql commands to allow a better batch processing</strong></a>
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<strong style="font-weight:normal;color:#505050;">Issue Type:</strong>
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<img src="https://hibernate.onjira.com/images/icons/bug.gif" height="16" width="16" border="0" align="absmiddle" alt="Bug"> Bug
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<strong style="font-weight:normal;color:#505050;">Affects Versions:</strong>
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<td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
3.6.1 </td>
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<strong style="font-weight:normal;color:#505050;">Assignee:</strong>
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Unassigned </td>
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<strong style="font-weight:normal;color:#505050;">Components:</strong>
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<td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
core </td>
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<strong style="font-weight:normal;color:#505050;">Created:</strong>
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20/Aug/12 11:51 AM
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<strong style="font-weight:normal;color:#505050;">Description:</strong>
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<p style='margin-top:0;margin-bottom:10px;'>The batch processing in hibernate has little effect on the delete sql request</p>
<p style='margin-top:0;margin-bottom:10px;'>The problem is that the delete sql request are not sorted and therefore the batch processing cannot work at its best performance</p>
<p style='margin-top:0;margin-bottom:10px;'>It should be possible to specify that we want the delete commands to be sorted.<br/>
It would be like what can be done for the insert and update commands (option order_insert and order_update)<br/>
A new option should be added order_delete and if this option is activated, the delete order would be sorted.</p>
<p style='margin-top:0;margin-bottom:10px;'>For your information, we tested the sorting of delete orders by modifying the sortAction() methods of the org.hibernate.engine.ActionQueue as follo : <br/>
The overall performance of the deletions was greatly improve</p>
<p style='margin-top:0;margin-bottom:10px;'> @SuppressWarnings({ "unchecked" })<br/>
public void sortActions() {<br/>
if ( session.getFactory().getSettings().isOrderUpdatesEnabled() ) {
//sort the updates by pk
java.util.Collections.sort( updates );
}<br/>
if ( session.getFactory().getSettings().isOrderInsertsEnabled() ) {
sortInsertActions();
}<br/>
java.util.Collections.sort( deletions );<br/>
}</p>
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<strong style="font-weight:normal;color:#505050;">Environment:</strong>
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3.6.1, DB2/ZOS
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<strong style="font-weight:normal;color:#505050;">Project:</strong>
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<a style="color:#6c797f;" href="https://hibernate.onjira.com/browse/HHH">Hibernate ORM</a>
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<strong style="font-weight:normal;color:#505050;">Priority:</strong>
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<img src="https://hibernate.onjira.com/images/icons/priority_major.gif" height="16" width="16" border="0" align="absmiddle" alt="Major"> Major
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<strong style="font-weight:normal;color:#505050;">Reporter:</strong>
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<a class="user-hover" rel="gwenael" id="email_gwenael" href="https://hibernate.onjira.com/secure/ViewProfile.jspa?name=gwenael" style="color:#6c797f;">Gueheneuc</a>
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