2016-03-01 15:45 GMT+01:00 Tom Lane <t...@sss.pgh.pa.us>:

> Pavel Stehule <pavel.steh...@gmail.com> writes:
> > I don't understand how is possible to get more rows from Sort node than
> in
> > nested seq scan?
> The "extra" rows are re-fetches triggered by mark/restore requests from
> the parent mergejoin.  The EXPLAIN instrumentation counts re-fetches as
> if they were new rows.


Thank you for explain



>                         regards, tom lane

Reply via email to