Обсуждение: create table as select... with auto increment id ?

We all know i can

create table freaky as select "abunchofstuff".

I work with rails developers and they are fussy about having an
auto incrementing "id" field.  Is there a way I can eak that out
of the above type statement, or am I stuck with creating the
table and no short cuts?

create table freaky ( id autoincrement, and-a-long-list int, and-perfect-order float )
insert into freaky as select "abunchofstuff-in-same-order"

I think I know the answer ;-<

Thanks for any info,

-Dave

On 26 July 2011 01:17, David Salisbury <salisbury@globe.gov> wrote:
> I work with rails developers and they are fussy about having an
> auto incrementing "id" field.  Is there a way I can eak that out
> of the above type statement, or am I stuck with creating the
> table and no short cuts?
>
> create table freaky ( id autoincrement, and-a-long-list int,
> and-perfect-order float )
> insert into freaky as select "abunchofstuff-in-same-order"
>
> I think I know the answer ;-<

http://wiki.postgresql.org/wiki/FAQ#How_do_I_create_a_serial.2Fauto-incrementing_field.3F

Hope that helps

--
Peter Geoghegan       http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training and Services

On 07/25/2011 05:17 PM, David Salisbury wrote:
>
> We all know i can
>
> create table freaky as select "abunchofstuff".
>
> I work with rails developers and they are fussy about having an
> auto incrementing "id" field.  Is there a way I can eak that out
> of the above type statement, or am I stuck with creating the
> table and no short cuts?
>
> create table freaky ( id autoincrement, and-a-long-list int,
> and-perfect-order float )
> insert into freaky as select "abunchofstuff-in-same-order"
>
> I think I know the answer ;-<

Not exactly as you wanted, but you can do the following:

create table twserid(id serial primary key, f1 text not null);
create table like_twserid(like twserid including all);

contrib_regression=# \d twserid
                         Table "public.twserid"
 Column |  Type   |                      Modifiers
--------+---------+------------------------------------------------------
 id     | integer | not null default nextval('twserid_id_seq'::regclass)
 f1     | text    | not null
Indexes:
    "twserid_pkey" PRIMARY KEY, btree (id)

contrib_regression=# \d like_twserid
                       Table "public.like_twserid"
 Column |  Type   |                      Modifiers
--------+---------+------------------------------------------------------
 id     | integer | not null default nextval('twserid_id_seq'::regclass)
 f1     | text    | not null
Indexes:
    "like_twserid_pkey" PRIMARY KEY, btree (id)

Then something like:
insert into like_twserid select * from twserid;
SELECT setval('twserid_id_seq', (select max(id) from like_twserid));

HTH,

Joe


--
Joe Conway
credativ LLC: http://www.credativ.us
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