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<p style="margin: 10px 0 0 0">I'm running into this problem when using the Criteria API. I apologize I haven't had a chance to put together a formal test case, but the following snippet may help demonstrate the NPE -</p>
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">CriteriaBuilder cb = entityManager.getCriteriaBuilder();
CriteriaQuery<Item> query = cb.createQuery(Item.class);
Root<Item> root = query.from(Item.class);
query.select(root).where(cb.equal(root.get(<span class="code-quote" style="color: #009100">"name"</span>), cb.lower(cb.literal(<span class="code-quote" style="color: #009100">"MOUSE"</span>))));
Item resultItem = entityManager.createQuery(query).getSingleResult();
assertNotNull(resultItem);
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<p style="margin: 10px 0 0 0">(Note that if <tt>cb.lower(cb.literal("MOUSE"))</tt> is replaced with the string literal "<tt>mouse</tt>", no exception is thrown.)</p>
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<td id="page-title-pattern-first-line" style="padding: 0px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 16px"> <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-8373" style="color: #3b73af; text-decoration: none"><img src="https://hibernate.atlassian.net/images/icons/issuetypes/bug.png" height="16" width="16" border="0" align="absmiddle" alt="Bug" /></a> <a href="https://hibernate.atlassian.net/browse/HHH-8373" style="color: #3b73af; text-decoration: none">HHH-8373</a>
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