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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-9576" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-86e7229d-9519-4d41-ad3c-eda0b5e741e0" height="16" width="16" border="0" align="absmiddle" alt="Improvement" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-9576" style="color: #3b73af; text-decoration: none">HHH-9576</a> </td>
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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-9576" style="color: #3b73af; text-decoration: none">Use JDBC bind variables for handling JPA Criteria query numeric literals</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">Change By:</th>
<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="steve" id="email_steve" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=steve" style="color:#6c797f;; color: #3b73af; text-decoration: none">Steve Ebersole</a> </td>
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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">A predicate with a String literal {{criteriaBuilder.equal(from.get("name"), "horse");}} creates a bind parameter: {{name=:param}}. Fine!<br><br>A predicate with a numeric literal {{criteriaBuilder.equal(from.get("age"), Integer.valueOf(42));}} does *not* create a bind parameter: {{age=42}}. Not fine!<br><br></span> <span class="diffaddedchars" style="background-color:#ddfade;">The concern here is that the fact that literals are used in the JDBC query rather than bind variables (parameters) a PreparedStatement cannot be effectively cached.<br><br></span> <span class="diffcontext">I think HHH-4698 caused this issue.<br><br>*Test Case*<br>{code:title=Animal.java|borderStyle=solid}<br>@Entity<br>public class Animal {<br> @Id<br> Long id;<br> String name;<br> Integer age;<br>}<br>{code}<br><br>{code:title=CriteriaParameterTest.java|borderStyle=solid}<br>@Entity<br> @Test<br> public void testPredicateWithString() {<br> EntityManager entityManager = getEntityManager();<br><br> CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();<br> CriteriaQuery<Animal> criteriaQuery = criteriaBuilder.createQuery(Animal.class);<br> Root<Animal> from = criteriaQuery.from(Animal.class);<br><br> Predicate namePredicate = criteriaBuilder.equal(from.get("name"), "horse");<br><br> criteriaQuery.select(from).where(namePredicate);<br> TypedQuery<Animal> typedQuery = entityManager.createQuery(criteriaQuery);<br><br> Query query = typedQuery.unwrap(QueryImpl.class).getHibernateQuery();<br> System.out.println(query.getQueryString());<br> assertTrue(query.getQueryString().contains("name=:param"));<br> }<br><br> @Test<br> public void testPredicateWithInteger() {<br> EntityManager entityManager = getEntityManager();<br><br> CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();<br> CriteriaQuery<Animal> criteriaQuery = criteriaBuilder.createQuery(Animal.class);<br> Root<Animal> from = criteriaQuery.from(Animal.class);<br><br> Predicate agePredicate = criteriaBuilder.equal(from.get("age"), Integer.valueOf(42));<br><br> criteriaQuery.select(from).where(agePredicate);<br> TypedQuery<Animal> typedQuery = entityManager.createQuery(criteriaQuery);<br><br> Query query = typedQuery.unwrap(QueryImpl.class).getHibernateQuery();<br> System.out.println(query.getQueryString());<br> assertTrue(query.getQueryString().contains("age=:param"));<br> }<br>}<br>{code}<br></span> </td>
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