BUG #1780: JDBC driver "setNull" throws for BLOB and CLOB columns

The following bug has been logged online:

Bug reference:      1780
Logged by:          Andrus Adamchik
Email address:      andrus@objectstyle.org
PostgreSQL version: 8.0.1
Operating system:   Mac OS X 10.4
Description:        JDBC driver "setNull" throws for BLOB and CLOB columns
Details:

Whenver I call PreparedStatement.setNull(int, int) on BLOB or CLOB columns,
an exception below occurs. Driver version: postgresql-8.0-310.jdbc3.jar. But
looks like latest CVS version has the same problem.

Test case:

            Driver d = new org.postgresql.Driver();

            Properties p = new Properties();
            p.put("user", "andrus");
            p.put("password", "andrus");

            Connection c =
d.connect("jdbc:postgresql://localhost:5432/cayenne", p);
            PreparedStatement st = c
                    .prepareStatement("insert into BLOB_TEST (BLOB_TEST_ID,
BLOB_COL) values (?, ?)");

            st.setInt(1, 1);

            // this is the line where it blows:
            st.setNull(2, Types.BLOB);


Stack trace:

org.postgresql.util.PSQLException: Unknown Types value.
    at
org.postgresql.jdbc2.AbstractJdbc2Statement.setNull(AbstractJdbc2Statement.j
ava:1003)
    at
org.postgresql.jdbc3.AbstractJdbc3Statement.setNull(AbstractJdbc3Statement.j
ava:1445)
    at NullBlob.main(NullBlob.java:24)