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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?atlOrigin=eyJpIjoiOGM2MWQyMzQ5ZmFjNDBhYzk4ZDk4OTcxMGYwZDY1MmMiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">Hibernate ORM</a> / <a href="https://hibernate.atlassian.net/browse/HHH-13086?atlOrigin=eyJpIjoiOGM2MWQyMzQ5ZmFjNDBhYzk4ZDk4OTcxMGYwZDY1MmMiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-fbed7e44-a0de-4d36-9fe4-b8779da2d9e2" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-13086?atlOrigin=eyJpIjoiOGM2MWQyMzQ5ZmFjNDBhYzk4ZDk4OTcxMGYwZDY1MmMiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">HHH-13086</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-13086?atlOrigin=eyJpIjoiOGM2MWQyMzQ5ZmFjNDBhYzk4ZDk4OTcxMGYwZDY1MmMiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">Inner join on a left join is not nested</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">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"> 5.3.1 </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"> MixJoinTest.zip </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"> 07/Nov/2018 05:12 AM </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: <br> -hibernate-core <br> -hibernate-entitymanager <br> <br> SGBD (any) <br> - for test : org.hsqldb/hsqldb/2.4.0 <br> </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="sbastienbouttier" id="email_sbastienbouttier" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=sbastienbouttier" style="color:#6c797f;; color: #3b73af; text-decoration: none">sébastien Bouttier</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">An inner join, next to left join, does not produce a nested join. It will end to an not intuitive result :</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">
<span class="code-comment" style="color: #808080">//I want all EntityA
</span> Root<EntityA> root = query.from(EntityA.class);
<span class="code-comment" style="color: #808080">//having <span class="code-quote" style="color: #009100; color: #808080">"eventually"</span> an EntityB (in bEntities)
</span> Join<EntityA, EntityB> aJoinB_LEFT = root.join(<span class="code-quote" style="color: #009100">"bEntities"</span>,LEFT);
<span class="code-comment" style="color: #808080">//only <span class="code-keyword" style="color: #000091; color: #808080">if</span> <span class="code-keyword" style="color: #000091; color: #808080">this</span> EntityB has an EntityC ...
</span> Join<EntityB, EntityC> bJoinC_INNER = aJoinB_LEFT.join(<span class="code-quote" style="color: #009100">"cEntities"</span>,INNER);
<span class="code-comment" style="color: #808080">//... named <span class="code-quote" style="color: #009100; color: #808080">"C1"</span>
</span> bJoinC_INNER.on(
cb.equal(
bJoinC_INNER.get(<span class="code-quote" style="color: #009100">"name"</span>),
<span class="code-quote" style="color: #009100">"C1"</span>));
</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">It produces :</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
entitya0_.name as col_0_0_,
bentities1_.name as col_1_0_,
centities2_.name as col_2_0_
from
EntityA entitya0_
left <span class="code-keyword" style="color: #000091">outer</span> join
EntityB bentities1_
on entitya0_.id=bentities1_.a_id
<span class="code-keyword" style="color: #000091">inner</span> join
EntityC centities2_
on bentities1_.id=centities2_.b_id
and (
centities2_.name=?
)
</pre>
</div>
</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">and abort the "optionnal effect" of the left join. It returns only entries responding to the left + the inner predicates, and excludes entities not responding to the left join at all (the purpose of left join).</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">A nested join would produce a more intuitive result :</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">
<div class="codeContent panelContent" style="padding: 9px 12px">
<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
entitya0_.name as col_0_0_,
bentities1_.name as col_1_0_,
centities2_.name as col_2_0_
from
EntityA entitya0_
left <span class="code-keyword" style="color: #000091">outer</span> join
EntityB bentities1_
<span class="code-keyword" style="color: #000091">inner</span> join
EntityC centities2_
on bentities1_.id=centities2_.b_id
and (
centities2_.name=?
)
on entitya0_.id=bentities1_.a_id
</pre>
</div>
</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">I understand that "intuitive" is subjective, and that i probably don't know the way to produce a nested join.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">I joined a some code to illustrate</p> </td>
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