Thread: enum data type

can somebody point me in the direction of info on how to implement an
'enum' data type?

trav


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Hi,
you can use the check.

create table language (
         lang_id SERIAL primary key,
         shortcut char(2) not null unique check (shortcut in
('en','nl','de'))
);

CoL

travis wrote:

> can somebody point me in the direction of info on how to implement an
> 'enum' data type?
>
> trav
>
>
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>

Postgres doesn't explicitly, but you can make one yourself:

CREATE TABLE enum ( id SERIAL PRIMARY KEY, data VARCHAR(10) );

CREATE TABLE test (
field INT REFERENCES enum
);

You could have a rule or trigger for "test" that converts the textual
representation to it's numeric id on insert if you want the added
convenience.

Keary Suska
Esoteritech, Inc.
"Leveraging Open Source for a better Internet"

> From: travis  <smitht@cache.net>
> Organization: Newsfeeds.com http://www.newsfeeds.com 80,000+ UNCENSORED
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> Date: Fri, 28 Sep 2001 15:00:59 -0600
> To: pgsql-general@postgresql.org
> Subject: [GENERAL] enum data type
>
> can somebody point me in the direction of info on how to implement an
> 'enum' data type?
>
> trav
>
>
> -----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
> http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
> -----==  Over 80,000 Newsgroups - 16 Different Servers! =-----
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