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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-7707" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-bf36c8a0-8cb5-485b-9c7f-6e878f6fb93e" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /></a> <a href="https://hibernate.atlassian.net/browse/HHH-7707" style="color: #3b73af; text-decoration: none">HHH-7707</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-7707" style="color: #3b73af; text-decoration: none">Described Implicit Join generates "CROSS JOIN" instead of "INNER JOIN"</a> </span>
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Change By:
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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="emundo" id="email_emundo" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=emundo" style="color:#6c797f;; color: #3b73af; text-decoration: none">eMundo GmbH</a>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0"> <span class="diffcontext">We have the following Entities defined:<br /><br /></span> <span class="diffaddedchars" style="background-color:#ddfade;">{code}<br /></span> <span class="diffcontext">@Entity<br />@Table(name = "table1")<br />public class Table1 implements VersionSupport, Persistable<Integer><br />{<br /><br /> @Id<br /> @GeneratedValue(strategy = GenerationType.AUTO)<br /> @Basic(optional = false)<br /> @Column(name = "table1_id", nullable = false)<br /> private Integer table1Id;<br /><br /><br /> @Basic(optional = true)<br /> @ManyToOne(fetch = FetchType.EAGER)<br /> @JoinColumn(name = "table2_refid")<br /> private Table2 table2;<br />}<br /><br />@Entity<br />@Table(name = "table2")<br />@Indexed<br />public class Table2 implements Persistable<Integer>, Auditable, VersionSupport<br />{<br /> @Id<br /> @GeneratedValue<br /> @DocumentId<br /> @Column(name = "table2_id", nullable = false)<br /> private Integer table2Id;<br /><br /> @Field<br /> @Column(name = "matchcode", nullable = false)<br /> private String matchcode;<br />}<br /></span> <span class="diffaddedchars" style="background-color:#ddfade;">{code}</span> <span class="diffcontext"><br />(shortend of course)<br /><br />If I try to do a HQL-Query like the following, I get a "CROSS JOIN" instead of a "INNER JOIN":<br /><br /><br /></span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><</span> <span class="diffaddedchars" style="background-color:#ddfade;">{</span> <span class="diffcontext">code</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">></span> <span class="diffaddedchars" style="background-color:#ddfade;">}</span> <span class="diffcontext"><br />StringBuilder sb = new StringBuilder();<br /><br />sb.append("from Table1 where table2.matchcode = :refid");<br /><br />Query query = sessionFactory.getCurrentSession().createQuery(sb.toString());<br /> query.setInteger("refid", value);<br /><br /> List<Table1> table1List = (List<Table1>) query.list();<br /><br /> return table1List;<br /> }<br /></span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"></</span> <span class="diffaddedchars" style="background-color:#ddfade;">{</span> <span class="diffcontext">code</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">></span> <span class="diffaddedchars" style="background-color:#ddfade;">}</span> <span class="diffcontext"><br /><br />HQL then generates me the following sql:<br /><br /></span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><</span> <span class="diffaddedchars" style="background-color:#ddfade;">{</span> <span class="diffcontext">code</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">></span> <span class="diffaddedchars" style="background-color:#ddfade;">:sql}</span> <span class="diffcontext"><br />select ... <br />from Table1 t1 CROSS JOIN Table2 t2<br />where t1.table2_id = t2.id<br />and matchcode = ...<br /></span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"></</span> <span class="diffaddedchars" style="background-color:#ddfade;">{</span> <span class="diffcontext">code</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">></span> <span class="diffaddedchars" style="background-color:#ddfade;">}</span> <span class="diffcontext"><br /><br />instead of <br /></span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><</span> <span class="diffaddedchars" style="background-color:#ddfade;">{</span> <span class="diffcontext">code</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">></span> <span class="diffaddedchars" style="background-color:#ddfade;">:sql}</span> <span class="diffcontext"><br />select ... <br />from Table1 t1 INNER JOIN Table2 t2 on t1.table2_id = t2.id<br />where matchcode = ...<br /></span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"></</span> <span class="diffaddedchars" style="background-color:#ddfade;">{</span> <span class="diffcontext">code</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">></span> <span class="diffaddedchars" style="background-color:#ddfade;">}</span> <span class="diffcontext"><br />which I will get if I do a explicit join:<br /><br /></span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><</span> <span class="diffaddedchars" style="background-color:#ddfade;">{</span> <span class="diffcontext">code</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">></span> <span class="diffaddedchars" style="background-color:#ddfade;">}</span> <span class="diffcontext"><br />StringBuilder sb = new StringBuilder();<br /><br />sb.append("from Table1 t1 join t1.table2Id where table2.matchcode = :refid");<br /><br />Query query = sessionFactory.getCurrentSession().createQuery(sb.toString());<br /> query.setInteger("refid", value);<br /><br /> List<Table1> table1List = (List<Table1>) query.list();<br /><br /> return table1List;<br /> }<br /></span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"></</span> <span class="diffaddedchars" style="background-color:#ddfade;">{</span> <span class="diffcontext">code</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">></span> <span class="diffaddedchars" style="background-color:#ddfade;">}</span> <span class="diffcontext"><br /><br /><br />That happens although documentation tells me in different way:<br />http://docs.jboss.org/hibernate/orm/3.6/reference/en-US/html/queryhql.html#queryhql-joins-forms<br /></span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><</span> <span class="diffaddedchars" style="background-color:#ddfade;">{</span> <span class="diffcontext">code</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">></span> <span class="diffaddedchars" style="background-color:#ddfade;">}</span> <span class="diffcontext"><br />HQL supports two forms of association joining: implicit and explicit.<br /><br />The queries shown in the previous section all use the explicit form, that is, where the join keyword is explicitly used in the from clause. This is the recommended form.<br /><br />The implicit form does not use the join keyword. Instead, the associations are "dereferenced" using dot-notation. implicit joins can appear in any of the HQL clauses. implicit join result in inner joins in the resulting SQL statement.<br /><br />from Cat as cat where cat.mate.name like '%s%'</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"></</span> <span class="diffaddedchars" style="background-color:#ddfade;">{</span> <span class="diffcontext">code</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">></span> <span class="diffaddedchars" style="background-color:#ddfade;">}</span> <span class="diffcontext"><br /><br />Who can help me in this case? I don't want to get ANY CROSS JOIN in my Program. In this case I have mapped my refid as nullable as it has to be filled later on in my program. But at the time I create this object it is nullable as I do not have this Object.<br /><br />Either way -> I turned it to not null and it happened again...</span>
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