Re: self defined data type "with limit"?

From: "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>
To: Martijn van Oosterhout <kleptog(at)svana(dot)org>
Cc: Michael Enke <michael(dot)enke(at)wincor-nixdorf(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: self defined data type "with limit"?
Date: 2007-06-27 16:50:03
Message-ID: 4682953B.7000503@commandprompt.com
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Martijn van Oosterhout wrote:
> On Wed, Jun 27, 2007 at 02:08:43PM +0200, Michael Enke wrote:
>> Hello everyone,
>> I have created a new data type "mychar". How can I specify a limit for it?
>>
>> This (unlimited version) works fine:
>> create table table_a(col_a mychar);
>
> What you want is called "user defined typmod" and I don't beleive any
> released version has it, but it will be in the next release.

I believe he could do it with a domain.

create domain myreal_char as varchar(50);
create table table_a(col_a myreal_char);

Joshua D. Drake

>
> Have a nice day,

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