通過jdbc執(zhí)行postgresql的存儲的函數(shù)報錯？

通過jdbc執(zhí)行postgresql的存儲的函數(shù)報下面這個錯是什么原因？

Statement stmt = conn.createStatement();
stmt.execute("CREATE OR REPLACE FUNCTION setoffunc() RETURNS SETOF int AS "
     + "' SELECT 1 UNION SELECT 2;' LANGUAGE sql");
ResultSet rs = stmt.executeQuery("SELECT * FROM setoffunc()");
while (rs.next())
{
   // do something
}
rs.close();
stmt.close();

參考https://jdbc.postgresql.org/d...