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<td class="page-title-pattern-first-line " style="padding: 0px; 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-9155" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-static-improvement-c47b794b-bcec-4249-87cd-221a24a4076f" height="16" width="16" border="0" align="absmiddle" alt="Improvement" style="vertical-align: text-bottom" /></a> <a href="https://hibernate.atlassian.net/browse/HHH-9155" style="color: #3b73af; text-decoration: none">HHH-9155</a>
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<td style="vertical-align: top;; padding: 0px; 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-9155" style="color: #3b73af; text-decoration: none">Implementing "alias"-projections and Transformers.aliasToBean()</a> </span>
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Issue Type:
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<td class="has-icon" style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-static-improvement-c47b794b-bcec-4249-87cd-221a24a4076f" height="16" width="16" border="0" align="absmiddle" alt="Improvement" style="vertical-align: text-bottom" /> Improvement
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Affects Versions:
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3.6.10
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Unassigned
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Components:
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envers
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Created:
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02/May/14 7:11 AM
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Environment:
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all
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Labels:
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performance envers projections
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Priority:
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Reporter:
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<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="zamrokk" id="email_zamrokk" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=zamrokk" style="color:#6c797f;; color: #3b73af; text-decoration: none">benjamin fuentes</a>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Here below is a short example of an extract for Excel report i can do with Hibernate Criteria API. It runs fast even for large volume.<br /> I would like to have same functionalities on AuditReader/AuditQuery.<br /> > create projections on alias tables (not only the current entity)<br /> > use Transformers.aliasToBean() to map directly to DTO bean</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Actually i am using getters to load lazy dependencies and it takes a while, For large volume it reaches server session timeout.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">---------------------------------------------------------------------------<br /> CODE :</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"> Session session = ((org.hibernate.ejb.EntityManagerImpl) entityManager.getDelegate()).getSession();</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"> Criteria criteria = session.createCriteria(Bill.class);</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"> //where<br /> criteria.add(Restrictions.in("id",idList));</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"> // order<br /> criteria.addOrder(Order.desc("creationDate"));</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"> //alias<br /> criteria.createAlias("chrono", "chrono", CriteriaSpecification.LEFT_JOIN);<br /> criteria.createAlias("company", "company", CriteriaSpecification.LEFT_JOIN);</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"> //projection here<br /> criteria.setProjection(Projections.projectionList()<br /> .add(Projections.property("id"),"id")<br /> .add(Projections.property("chrono.value"),"chronoValue")<br /> .add(Projections.property("creationDate"),"creationDate")<br /> .add(Projections.property("company.name"),"companyName")<br /> .add(Projections.property("company.companyNumber"),"companyNumber")<br /> .add(Projections.property("amountExcludingTaxes"),"amountExcludingTaxes")<br /> .add(Projections.property("discountAmount"),"discountAmount")<br /> );</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"> //to DTO<br /> criteria.setResultTransformer(Transformers.aliasToBean(BillFullExcelDto.class));</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"> List<BillFullExcelDto> billFullExcelDtos = criteria.list();</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">-------------------------------------------------------</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Thank you.</p>
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