Re: logical column ordering

Tomas Vondra-4 wrote
> But if we want to allow users to define this, I'd say let's make that
> part of CREATE TABLE, i.e. the order of columns defines logical order,
> and you use something like 'AFTER' to specify physical order.
>
> CREATE TABLE test (
> a INT AFTER b, -- attlognum = 1, attphysnum = 2
> b INT -- attlognum = 2, attphysnum = 1
> );

Why not memorialize this as a storage parameter?

CREATE TABLE test (
a INT, b INT
)
WITH (layout = 'b, a')
;

A canonical form should be defined and then ALTER TABLE can either directly
update the current value or require the user to specify a new layout before
it will perform the alteration.

David J.

--
View this message in context: http://postgresql.nabble.com/logical-column-ordering-tp5829775p5839825.html
Sent from the PostgreSQL - hackers mailing list archive at Nabble.com.