problem with zxJDBC and clobs

I've run into a problem with zxJDBC and clobs.  The code:

from com.ziclix.python.sql import zxJDBC as DBAPI
...
 crs.execute("update session set xml=? "
                "where "
                "id=1",
                [xml_clob],
                {0:DBAPI.CLOB})


Generates the error:

   crs.execute("update session set xml=? "
   Error: ORA-01461: can bind a LONG value only for insert into a LONG
column
   [SQLCode: 1461], [SQLState: 72000]



I have to use the actual clob datatype here, as using the STRING data type
produces:

   crs.execute("update session set xml=? "
   Error: error setting index [1], type [12] [SQLCode: 0]
   setString can only process strings of less than 32766 chararacters
[SQLCode: 17157]

The problem is no longer critical to me as I've managed to work around it
by using direct JDBC calls:

   ps=db.__connection__.prepareStatement("update session set xml=? "
                                          "where "
                                          "id=1"
                                          )
    ps.setStringForClob(1,xml_clob)
    ps.executeUpdate()


However, even with that workaround, I'm a bit nervous as to if that
statement executes in the same transaction as the others.

Is the zxJDBC clob code broken, or am I somehow using it incorrectly?

FWIW, I'm running Jython 2.7.0 installed via brew on Mac OS 10.10.5.

Thanks for any help you can provide.

-Jon

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