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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: 10px 0 0; margin-top: 0">The only way you can do this with plain Hibernate is via HQL. Something like the following would do</p>
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<pre class="code-sql" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-keyword" style="color: #000091">SELECT</span> <span class="code-keyword" style="color: #000091">a</span>.<span class="code-keyword" style="color: #000091">value</span>, b.<span class="code-keyword" style="color: #000091">value</span>, <span class="code-keyword" style="color: #000091">c</span>.<span class="code-keyword" style="color: #000091">value</span>
<span class="code-keyword" style="color: #000091">FROM</span> <span class="code-keyword" style="color: #000091">A</span> <span class="code-keyword" style="color: #000091">a</span>
<span class="code-keyword" style="color: #000091">LEFT</span> <span class="code-keyword" style="color: #000091">JOIN</span> <span class="code-keyword" style="color: #000091">C</span> <span class="code-keyword" style="color: #000091">c</span> <span class="code-keyword" style="color: #000091">ON</span> <span class="code-keyword" style="color: #000091">c</span>.<span class="code-keyword" style="color: #000091">value</span> = <span class="code-quote" style="color: #009100">'a_1'</span> <span class="code-keyword" style="color: #000091">AND</span> <span class="code-keyword" style="color: #000091">EXISTS</span>(<span class="code-keyword" style="color: #000091">SELECT</span> 1 <span class="code-keyword" style="color: #000091">FROM</span> B b <span class="code-keyword" style="color: #000091">WHERE</span> <span class="code-keyword" style="color: #000091">c</span>.b = b <span class="code-keyword" style="color: #000091">AND</span> b.<span class="code-keyword" style="color: #000091">a</span> = <span class="code-keyword" style="color: #000091">a</span>)
<span class="code-keyword" style="color: #000091">LEFT</span> <span class="code-keyword" style="color: #000091">JOIN</span> B b <span class="code-keyword" style="color: #000091">ON</span> <span class="code-keyword" style="color: #000091">c</span>.b = b <span class="code-keyword" style="color: #000091">AND</span> b.<span class="code-keyword" style="color: #000091">a</span> = <span class="code-keyword" style="color: #000091">a</span>
</pre>
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</div> <p style="margin: 10px 0 0">If you are willing to try out something you could also give the JPA Criteria implementation of <a href="https://github.com/Blazebit/blaze-persistence/#manual-setup" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">Blaze-Persistence</a> a shot which provides support for entity joins.<br> It's a different implementation of the JPA Criteria API that in the end translates to JPQL/HQL that runs on an existing JPA provider. It also adds support for CTEs which would probably also solve your problem.</p> </td>
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