Bug #794: JDBC 7.3 PreparedStatement.setNull(..) .setObject(.., null) throws exception

Olaf Liepelt (olafl(at)comrad(dot)co(dot)nz) reports a bug with a severity of 1
The lower the number the more severe it is.

Short Description
JDBC 7.3 PreparedStatement.setNull(..) .setObject(.., null) throws exception

Long Description
I'm using your JDBC driver 7.3 beta 1 (tested the developer one as well).
Folowing steps i've done:
- Connecting to the datatbase
- Set the connection into transaction mode
- Created a PreparedStatement

Filled in the set column=? with setObject(column, Object);
when an Object is null the PreparedStatement.executeUpdate() throws an exception:
No value specified for parameter 3
at org.postgresql.core.QueryExecutor.sendQuery(QueryExecutor.java:143)
at org.postgresql.core.QueryExecutor.execute(QueryExecutor.java:65)
at org.postgresql.jdbc1.AbstractJdbc1Connection.ExecSQL(AbstractJdbc1Connection.java:468)
at org.postgresql.jdbc1.AbstractJdbc1Statement.execute(AbstractJdbc1Statement.java:320)
at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:48)
at org.postgresql.jdbc1.AbstractJdbc1Statement.executeUpdate(AbstractJdbc1Statement.java:197)
at comrad.database.sql.DatabaseAccess.doUpdate(DatabaseAccess.java:1497)
... my stuff

where parameter 3 was 'null'.

The same happens if I'm using the method setNull(column, type).

After the exception I'd like to rollback all changes. I get another exception when calling rollback():

java.sql.SQLException: ERROR: Attribute 'nullqrollback' not found

at org.postgresql.core.QueryExecutor.execute(QueryExecutor.java:126)
at org.postgresql.jdbc1.AbstractJdbc1Connection.ExecSQL(AbstractJdbc1Co
nnection.java:449)
at org.postgresql.jdbc1.AbstractJdbc1Connection.ExecSQL(AbstractJdbc1Co
nnection.java:432)
at org.postgresql.jdbc1.AbstractJdbc1Connection.rollback(AbstractJdbc1C
onnection.java:967)
at comrad.database.sql.DatabaseAccess.endTransaction(DatabaseAccess.jav
a:929)
... my stuff

Sample Code

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