I don`t know, if there is a special feature in postgresql for this.
The standard SQL-way is to create a lookup-table and define a foreign-key to it.
create table states( state_id int primary key not null
, state_text varchar(30) not null
, constraint uk_states_state_text unique( state_text ) );
create table states( state_id int primary key not null , state_text varchar(30) not null );
alter table states add constraint uk_states_state_text unique( state_text );
create table your_table (
...
state_id int not null
, constraint fk_yt_state_id foreign key (state_id) references states
);
raptor@tvskat.net schrieb:
> hi,
>
> Is it possible in Postgre to have enum type, so that later table fileld get values from 1-6 (saving space)
>
> 1 - statex
> 2 - stateY
> 3 - stateZ
>
> something like that and then constrain on this enum type..
>
> tia
>
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