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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-10161" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-2a6f5782-0e14-4a0e-8f80-881e0186f9eb" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /></a> <a href="https://hibernate.atlassian.net/browse/HHH-10161" style="color: #3b73af; text-decoration: none">HHH-10161</a>
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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-10161" style="color: #3b73af; text-decoration: none">Hibernate ignores return value from javax.persistence.Parameter#getParameterType()</a> </span>
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Change By:
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<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="gbadner" id="email_gbadner" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=gbadner" style="color:#6c797f;; color: #3b73af; text-decoration: none">Gail Badner</a>
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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">Hibernate ignores the return value for</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> <br /></span> <span class="diffaddedchars" style="background-color:#ddfade;"> {{javax.persistence.Parameter#getParameterType()}} when provided to {{javax.persistence.Query#setParameter(Parameter<T> param, T value)}}.</span> <span class="diffcontext"><br /></span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">The</span> <span class="diffaddedchars" style="background-color:#ddfade;"><br />This can cause problems for Oracle when a null value is bound for a parameter (assumed to be BINARY) that is compared with a NUMBER column, because Oracle does not allow conversion from BINARY to NUMBER. Oracle requires that the null value be bound as a type that is compatible with NUMBER. JPA provides a way to specify the type using javax.persistence.Parameter, but since Hibernate ignores the return value from {{javax.persistence.Parameter#getParameterType()}}, the query will fail because the value continues to be bound as a BINARY value.<br /><br />For example, the</span> <span class="diffcontext"> following</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> should</span> <span class="diffaddedchars" style="background-color:#ddfade;"> native query</span> <span class="diffcontext"> work</span> <span class="diffaddedchars" style="background-color:#ddfade;"> on Oracle</span> <span class="diffcontext">, but it is apparently broken:<br /><br />String sql = "SELECT * FROM schema.Tabela WHERE integerColumn = ?</span> <span class="diffaddedchars" style="background-color:#ddfade;"> OR integerColumn is null</span> <span class="diffcontext">"<br />Query query = getEntityManager().createNativeQuery(sql, classe);<br />Parameter p = new Parameter() {<br /> @Override<br /> public String getName() {<br /> return null;<br /> }<br /> @Override<br /> public Integer getPosition() {<br /> return 1;<br /> }<br /> @Override<br /> public Class getParameterType() {<br /> return Integer.TYPE;<br /> }<br />};<br />query.setParameter( p, null );<br />query.getResultList(); //</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> also</span> <span class="diffcontext"> fails</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">!!!</span> <span class="diffcontext"><br /><br />A workaround is to get the get underlying org.hibernate.Query and use its API:<br /><br />String sql = "SELECT * FROM schema.Tabela WHERE integerColumn = ?"<br />Query query = getEntityManager().createNativeQuery(sql, classe);<br />q.unwrap( HibernateQuery.class ).getHibernateQuery() // gets org.hibernate.Query<br /> .setParameter( <br /> 0, // org.hibernate.Query parameters start at 0<br /> null, // the null value<br /> StandardBasicTypes.INTEGER // the parameter type<br /> );<br />query.getResultList();</span> <span class="diffaddedchars" style="background-color:#ddfade;"> // succeeds</span> <span class="diffcontext"><br /></span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br />Note that the condition "integerColumn = ?" will always be false if null is bound (because a null value is considered "unknown"; an null (unknown) value will never equal another null (unknown) value. If the intention is for also check for a null value then the query should be:<br /><br />"SELECT * FROM schema.Tabela WHERE integerColumn = ? OR integerColumn is null"</span>
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