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create table gadget_user_pref
(
        gadget_user_pref_id    number(38)     not null,
	gadget_id              number(38)     not null, 
        name                   varchar2(100)  not null,
        display_name           varchar2(100)  not null,
        datatype               varchar2(10)   not null,
        required               varchar2(1)    not null,
        default_value          varchar2(4000), 
        constraint gadget_user_pref_pk 
            primary key (gadget_user_pref_id),
        constraint gadget_user_pref_name_unq
            unique (gadget_id, name),
        constraint gadget_user_pref_display_unq
            unique (gadget_id, display_name),
        constraint gadget_user_pref_required_chk
            check (required in ('Y','N'))                
);

alter table gadget_user_pref
add constraint user_pref_gadget_id_fk
foreign key (gadget_id)
references gadget (gadget_id);
