Re: autoupdating mtime column

On 8/4/06, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>
> If you are really intent on having a way to suppress the mtime update
> you could dedicate an additional field to the purpose, eg
>
> UPDATE t SET foo=..., bar=..., keepmtime = true ...
>
> and in the trigger something like
>
> if new.keepmtime then
> new.keepmtime = false;
> else
> new.mtime = now();
>
> As long as nothing else ever touches keepmtime this would work.
> Personally I'm dubious that it's worth the trouble

Yeah, it's too expensive an overhead just for the sake of a slightly shorter
UPDATE statement.

--- do you
> have a real use-case for suppressing mtime updates?
>

Syncing tables between databases (a la "rsync --times"). Btw, I'm
considering temporarily disabling the update_times() trigger when sync-ing.

Thanks,
--
dave