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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-11365" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-3797cc14-de38-478f-97b8-83fc2665e88e" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-11365" style="color: #3b73af; text-decoration: none">HHH-11365</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-11365" style="color: #3b73af; text-decoration: none">Joining unrelated class first, than assosiation</a> </span> </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">Issue Type:</th>
<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-3797cc14-de38-478f-97b8-83fc2665e88e" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"> Bug </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">Affects Versions:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 5.1.0 </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"> Unassigned </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"> hibernate-core </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"> 30/Dec/2016 00:18 AM </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-static-major-1b29da6f-439d-4d9a-b37a-97e8920fd9f3" height="16" width="16" border="0" align="absmiddle" alt="Major" style="vertical-align: text-bottom"> Major </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="novakv" id="email_novakv" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=novakv" style="color:#6c797f;; color: #3b73af; text-decoration: none">Vít Novák</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">With <span class="jira-issue-macro resolved" data-jira-key="HHH-16">
<!-- replace the span with an AUI template --> <a href="https://hibernate.atlassian.net/browse/HHH-16" class="jira-issue-macro-key issue-link" title="Explicit joins on unrelated classes" style="color: #3b73af; text-decoration: none"> <img class="icon" src="https://hibernate.atlassian.net/secure/viewavatar?size=xsmall&avatarId=12151&avatarType=issuetype"> HHH-16 </a> <span class="aui-lozenge aui-lozenge-subtle aui-lozenge-success jira-macro-single-issue-export-pdf" style="background: #cccccc; border: 1px solid #cccccc; border-radius: 3px; color: #333333; display: inline-block; font-size: 11px; font-weight: bold; line-height: 99%; margin: 0; padding: 2px 5px; text-align: center; text-decoration: none; text-transform: uppercase; background-color: #ffffff; border-color: #cccccc; color: #333333" bgcolor="#ffffff">Closed</span> </span> we can join classes that don't have any assosiation. Anyway, if the joined class further joins its assosiations, the join clause is missing in the generated SQL. For example this HQL:</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px; border-radius: 3px; margin: 9px 0">
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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">
select c.id, o.id, i.id
from Customer c
left join Order o on c.id = o.customer.id
left join o.items i
</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">generates SQL like this:</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">
select
customer0_.id as col_0_0_,
order1_.id as col_1_0_,
items2_.id as col_2_0_
from
TEST_CUSTOMER customer0_
left <span class="code-keyword" style="color: #000091">outer</span> join
TEST_ORDER order1_
on (
customer0_.id=order1_.customer
)
</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0"><tt>Order</tt> is joined, <tt>OrderItem</tt> is not. Note that the item id column alias is there. </p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0"><b>Implicit join</b> doesn't work as well (see <span class="jira-issue-macro" data-jira-key="HHH-10503">
<!-- replace the span with an AUI template --> <a href="https://hibernate.atlassian.net/browse/HHH-10503" class="jira-issue-macro-key issue-link" title="Allow entity-joins and implicit joins in same query" style="color: #3b73af; text-decoration: none"> <img class="icon" src="https://hibernate.atlassian.net/secure/viewavatar?size=xsmall&avatarId=12150&avatarType=issuetype"> HHH-10503 </a> <span class="aui-lozenge aui-lozenge-subtle aui-lozenge-complete jira-macro-single-issue-export-pdf" style="background: #cccccc; border: 1px solid #cccccc; border-radius: 3px; color: #333333; display: inline-block; font-size: 11px; font-weight: bold; line-height: 99%; margin: 0; padding: 2px 5px; text-align: center; text-decoration: none; text-transform: uppercase; background-color: #ffffff; border-color: #cccccc; color: #333333" bgcolor="#ffffff">Open</span> </span> ).</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0"><b>Workaround:</b><br> If the second join used <tt>ON</tt> clause, it works fine. This most probably applies for subsequent joins as well, thus, once the <tt>ON</tt> clause is used, we cannot go back to joining assosiations. HQL that works:</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">
select c.id, o.id, i.id
from Customer c
left join Order o on c.id = o.customer.id
left join OrderItem i on i.order.id = o.id
</pre>
</div>
</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">I am attaching few tests to check the behaviour. If I knew where to start, I might try to create a patch as well.</p> </td>
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