On 02/06/2014 04:16 AM, Michael Sacket wrote:
> Often times I find it necessary to work with table rows in a specific,
> generally user-supplied order. It could be anything really that
> requires an ordering that can't come from a natural column. Most of
> the time this involved manipulating a position column from the client
> application. In any case, I've often found that to be cumbersome, but
> I think I've come up with a solution that some of you may find useful.
>
Up until 9.4, that's a good way to do it.
Starting from 9.4, you can use the WITH ORDINALITY feature.
http://www.postgresql.org/docs/devel/static/sql-select.html
--
Vik