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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-9354" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-static-bug-df9a14f8-88dc-4f73-a197-57186736a7f4" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /></a> <a href="https://hibernate.atlassian.net/browse/HHH-9354" style="color: #3b73af; text-decoration: none">HHH-9354</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-9354" style="color: #3b73af; text-decoration: none">fetching eager - result i n repeating one relation a lot of times</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-bug-df9a14f8-88dc-4f73-a197-57186736a7f4" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /> Bug
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Affects Versions:
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4.3.6
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Unassigned
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Attachments:
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hibernate-fetching-bug.zip
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Components:
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entity-manager
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Created:
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21/Aug/2014 00:17 AM
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Environment:
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Windows 8.1;Tomcat 7;Spring; Spring Data Jpa
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Labels:
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Jpa Lazy Eager ManyToMany
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Priority:
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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-major-f4449f4e-f638-46dc-ab9b-18b13af00c25" height="16" width="16" border="0" align="absmiddle" alt="Major" style="vertical-align: text-bottom" /> Major
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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="oak_tree" id="email_oak_tree" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=oak_tree" style="color:#6c797f;; color: #3b73af; text-decoration: none">oaktree</a>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">I have One Main entity called Report. I have several entities connect to Report with ManyToMany Relation. The connection is done via extra table. i.e with @JoinTable annotation. each relation is lazy.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">I have a function that fetch the report with all its relations. now, if i do fetch by accessing the property (i.e mark the function as @Transcational and access to each one of the property) everything works as expected. But, if I do</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Report r = null;<br /> CriteriaBuilder cb = em.getCriteriaBuilder();<br /> CriteriaQuery<Report> query = cb.createQuery(Report.class);<br /> Root<Report> report = query.from(Report.class);<br /> ArrayList<Predicate> preds = new ArrayList<Predicate>();<br /> DomainSpecification.<Report>eager().toPredicate(report, query, cb);<br /> preds.add(DomainSpecification.<Report>idIsEqual(id).toPredicate(report, query, cb));<br /> query.where(cb.and(preds.toArray(new Predicate<span class="error">[preds.size()]</span>)));<br /> query.select(report);<br /> List<Report> results = em.createQuery(query).setMaxResults(1).get</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">i get all the relations as well but One of the relation (that has been connected to another table NOT by primary key) is fetching 13823 times<br /> this means that the length of r.getProjects() is 13823 of the same Project.<br /> I attaching here the source of Domain Specification/Report.java/Project.java and Keyword.java (the keyword is just to show an example for an entity that works good with this kind of fetching)<br /> Maybe one can throw some light on this issues</p>
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