postgresql7.1
select user_pref_type__set_package_default(
:preference_type_id,
:package_id,
:default_value
);
select user_pref_type__set_user_pref(
:preference_type,
:package_id,
:user_id,
:value
);
select user_pref_type__get_user_pref (
:preference_type,
:package_id,
:user_id
);