BUG #2514: (jdbc driver) Multiple inlined statements with mixed updates and queries return wrong results

The following bug has been logged online:

Bug reference: 2514
Logged by: Gilles
Email address: gilles(dot)rayrat(at)continuent(dot)com
PostgreSQL version: 8.0.7
Operating system: linux
Description: (jdbc driver) Multiple inlined statements with mixed
updates and queries return wrong results
Details:

jdbc driver: 8.1.405

When issuing this:
statement.execute("SELECT 2;UPDATE foo SET d='babar' where i=1; SELECT 3");
The 2 result returned is wrong. This seems to be a ResultSet containing the
same values as the first RS (it should be an update count)

Here is code to reproduce:

stmt.executeUpdate("CREATE TABLE foo(i integer, d varchar(5))");
stmt.executeUpdate("INSERT INTO foo values(1,'bar')");
boolean isRS = stmt.execute("SELECT 2;UPDATE foo SET d='babar' where
i=1; SELECT 3");
assertTrue(isRS);
ResultSet rs = stmt.getResultSet();
assertTrue(rs.next());
assertEquals(rs.getInt(1), 2);
rs.close();
assertFalse(stmt.getMoreResults()); // <= This fails !
assertEquals(stmt.getUpdateCount(), 1);
assertTrue(stmt.getMoreResults());
rs = stmt.getResultSet();
assertTrue(rs.next());
assertEquals(rs.getInt(1), 3);
rs.close();
stmt.close();