Ilja Golshtein wrote:
> Hello!
>
> Is it Ok to use xmin column in application programm?
>
> Purpose is obvios: I need to know the record was not changed since
> a moment in the past and things like this.
> So every UPDATE should somehow change value of the column.
>
> The choice it trigger or xmin.
> Which is better (from perfomance, reliability, compartibility,
> whatever, point of view)?
The only problem with using xmin is that it's not portable. You won't
find it in Mysql/Oracle etc.
--
Richard Huxton
Archonet Ltd