function getRole($rolename)
{
$this->clean($rolename);
$sql = "\n\t\t\tSELECT rolname, rolsuper, rolcreatedb, rolcreaterole, rolinherit,\n\t\t\t\trolcanlogin, rolconnlimit, rolvaliduntil, rolconfig\n\t\t\tFROM pg_catalog.pg_roles WHERE rolname='{$rolename}'";
return $this->selectSet($sql);
}