Re: [PATCH] Enforce that INSERT...RETURNING preserves the order of multi rows

On 10/21/2012 12:36 PM, Andres Freund wrote:
> On Sunday, October 21, 2012 06:30:14 PM Andrew Dunstan wrote:
>> On 10/21/2012 12:20 PM, Abhijit Menon-Sen wrote:
>>> At 2012-10-21 11:49:26 -0400, cbbrowne(at)gmail(dot)com wrote:
>>>> If there is a natural sequence (e.g. - a value assigned by nextval()),
>>>> that offers a natural place to apply the usual order-imposing ORDER BY
>>>> that we are expected to use elsewhere.
>>> Note: "INSERT … RETURNING" doesn't accept an ORDER BY clause.
>> No, but you can wrap the INSERT .. RETURNING in a CTE and order that.
> Personally I find that a not very practical suggestion. It means you need the
> ability to sort the data equivalently on the clientside which isn't always
> easy if you consider platform/locale and whatever differences.

Er, what?

with orig_inserts as
(
insert into table_1
...
returning *
),
ordered_inserts as
(
select * from orig_inserts
order by ...
)
insert into table_2
select * from ordered_inserts ...;

why does the client have to be involved, exactly?

cheers

andrew