ClassCastException from Query to JDBCQuery

Section 4.6 of the 3.0b2 documentation states, "You can safely cast any
query instance returned by a Kodo JDO persistence manager to a JDBCQuery."
I get the following stack trace when I attempt to do so:
java.lang.ClassCastException
at kodopt.UserManagerServlet.doGet(UserManagerServlet.java:1060)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:126)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:103)
at
com.caucho.server.http.FilterChainServlet.doFilter(FilterChainServlet.java:96)
at com.caucho.server.http.Invocation.service(Invocation.java:315)
at
com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
at
com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:246)
at
com.caucho.server.http.HttpRequest.handleConnection(HttpRequest.java:163)
at com.caucho.server.TcpConnection.run(TcpConnection.java:139)
at java.lang.Thread.run(Thread.java:536)
I set javax.jdo.PersistenceManagerFactoryClass to
kodo.jdbc.runtime.JDBCPersistenceManagerFatory. The object type returned
by PersistenceManager.newQuery() is kodo.datacache.CacheAwareQuery. Is
this a bug, or am I doing something wrong?

Abe White wrote:
The object type returned
by PersistenceManager.newQuery() is kodo.datacache.CacheAwareQuery. Is
this a bug, or am I doing something wrong?
Argh; it's a bug. It'll only happen when the data cache is enabled, by
the way. Darn... you'll have to make due with casting to
kodo.query.KodoQuery.
Was there a specific JDBCQuery method you needed to invoke?Yes... setJoinSyntax().

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