Sergey Konoplev escribió:
> On Fri, Dec 20, 2013 at 7:59 AM, Alvaro Herrera
> <alvherre@2ndquadrant.com> wrote:
> > Eh. Why can't you just do something like
> >
> > WITH moved AS (
> > DELETE FROM src WHERE ..
> > RETURNING *
> > ) INSERT INTO dst SELECT * FROM moved;
>
> Avero, I think it could be cheaper to do this like it is shown below, correct?
>
> psql dbname -c 'copy src to stdout' | \
> psql dbname -c 'copy dst from stdin; truncate src;'
Yes, if you can get rid of the old records by removing or emptying a
partition (or de-inheriting it, as suggested elsewhere in the thread),
that's better than DELETE because that way you don't create dead rows to
vacuum later.
--
Álvaro Herrera http://www.2ndQuadrant.com/
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