BUG #4617: JDBC Drivers 8.2/8.3 return no ResultSet

The following bug has been logged online:

Bug reference:      4617
Logged by:          Raymond L. Naseef
Email address:      naseef@egr.msu.edu
PostgreSQL version: 8.3 & 7.4
Operating system:   FreeBSD
Description:        JDBC Drivers 8.2/8.3 return no ResultSet
Details:

Below is query using temporary table instead of "IN" to greatly improve
performance.  This worked in older JDBC driver, but no longer does.  The
following were checked, making no difference:

1) Removed from query:
CREATE UNIQUE INDEX lookup_username_idx
 ON lookup_username
 USING btree
 (username);

2) Setting auto-commit (checked with false and true, and unset).


Servers:
    PostgreSQL 7.4.19 on amd64-portbld-freebsd7.0, compiled by GCC cc (GCC)
4.2.1.20070719 [FreeBSD]
    PostgreSQL 8.3.5 on amd64-portbld-freebsd7.0, compiled by GCC cc (GCC)
4.2.1.20070719 [FreeBSD]

JDBC Drivers:

Result    Driver
======  ===================
WORK    pg74.216.jdbc3.jar

FAIL    postgresql-8.2-506.jdbc3.jar
FAIL    postgresql-8.3-604.jdbc3.jar


This was tested using AutoCommit default and false, using EITHER A or B:
  PreparedStatement ps = connection.prepareStatement([shown_below]);
[ A ]
  ps.execute();
  ResultSet rs = ps.getResultSet();
RESULT:
    rs == null
[ B ]
  ResultSet rs = ps.executeQuery();
RESULT:
    org.postgresql.util.PSQLException: No results were returned by the query.


QUERY:
------
create temporary table lookup_username (username varchar) on commit drop;
insert into lookup_username values ('naseef');
CREATE UNIQUE INDEX lookup_username_idx
 ON lookup_username
 USING btree
 (username);

SELECT enp.username, trim(enp.full_name)
FROM egr_nis_person as enp
JOIN lookup_username as lu
 ON lu.username = enp.username
WHERE enp.start_date < now() + interval '30 seconds'
AND enp.end_date > now() + interval '30 seconds';