Re: auto-increment field : in a simple way - Mailing list pgsql-general

From JC de Villa
Subject Re: auto-increment field : in a simple way
Date
Msg-id CAOvw+Nb89kY0saNH8EUv6ZEay6e7Q0bg7_OdKz7WYqqaVeiK7w@mail.gmail.com
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In response to Re: auto-increment field : in a simple way  (Vineet Deodhar <vineet.deodhar@gmail.com>)
List pgsql-general


On Thu, Oct 11, 2012 at 5:11 PM, Vineet Deodhar <vineet.deodhar@gmail.com> wrote:
On Thu, Oct 11, 2012 at 12:56 PM, Scott Marlowe <scott.marlowe@gmail.com> wrote:

Can't you just add this to your create table:


CREATE TABLE tablename (
   colname SERIAL
, check (colname>0 and colname < 32768));
);



With this constraint, whether the storage space requirement would reduce?
OR
Is it just for validation of data?

--- Vineet

Well, there's smallserial when creating tables...

create table test(a smallserial);
NOTICE:  CREATE TABLE will create implicit sequence "test_a_seq" for serial column "test.a"
CREATE TABLE

                         Table "public.test"
 Column |   Type   |                    Modifiers                     
--------+----------+--------------------------------------------------
 a      | smallint | not null default nextval('test_a_seq'::regclass)

--
JC de Villa

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