A result was returned by the statement, when none was expected.

    Hello all.

    I'm using PostgreSQL 7.2.2, with the latest JDBC driver, JDK 1.4.1, under
linux.

    In my database, I have several functions defined, and I use them to
insert & update rows in the database.  Here is an example.
create function insert_artist (varchar, int) returns bigint as '
        insert into artist (name, genre_loid)
                values ($1, $2);
        select currval(\'loid_seq\');'
        language 'sql';
create function update_artist (varchar, bigint, bigint) returns integer as
'
        update artist
                set name = $1, genre_loid = $2
                where loid = $3;
        select 1;'
        language 'sql';

    The insert_artist function returns the last value assigned by a sequence,
and update_artist simply returns the integer 1.

    When executed from psql with: select x_artist(...); all is as expected.
When I execute it from Java via:
Statement statement = connection.createStatement();
int result = statement.executeUpdate("select x_artist(...)");
the row is updated or inserted, as is the case, but I get the follwoing
exception.
A result was returned by the statement, when none was expected.
    at org.postgresql.jdbc2.Statement.executeUpdate(Statement.java:75)
    at com.silverfields.dbAccess.DBObject.save(DBObject.java:205)


    What have I done incorrectly?  Both functions are defined to return a
single value, and Statement.executeUpdate(String) returns a single value.