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POWhy is a Hibernate JPQL Type Cast necessary for String
 

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    <p>I am using the Play! Framework for a small application. In a Model I have the following Query:</p> <pre><code>public static ApplicationUser getByUserName(String userName) { return ApplicationUser.find("SELECT u FROM ApplicationUser u WHERE u.userName = ?", userName).first(); } </code></pre> <p>This works perfectly with the in memory DB H2 but when I use Postgres I get the following error:</p> <pre><code>22:57:10,371 WARN ~ SQL Error: 0, SQLState: 42883 22:57:10,371 ERROR ~ ERROR: operator does not exist: character varying = bytea Hint: No operator matches the given name and argument type(s). You might need to add explicit type casts. Position: 167 </code></pre> <p>When I cast the parameter like:</p> <pre><code>ApplicationUser.find("SELECT u FROM ApplicationUser u WHERE u.userName = CAST(? AS string)", userName).first() </code></pre> <p>Then it works. But why is this necessary. Could that be a Hibernate bug?</p> <p><strong>Update:</strong> I downgraded the play Version from 1.2.4 to 1.2.3 and now it works. I think the problem lies in the shipped postgres jdbc driver probably.</p> <p><strong>Update II</strong>: The problem is still not solved. I get the same error again for the query:</p> <pre><code>ApplicationRole.find("byName", name).first(); </code></pre> <p>The error:</p> <pre><code>JPAQueryException occured : Error while executing query SELECT u FROM ApplicationUser u WHERE u.userName = ?: ERROR: operator does not exist: character varying = bytea Hint: No operator matches the given name and argument type(s). You might need to add explicit type casts. </code></pre> <p>In <code>application.conf</code> I have:</p> <blockquote> <p>jpa.dialect=org.hibernate.dialect.PostgreSQLDialect</p> </blockquote> <p>Nobody having this error?</p>
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