Обсуждение: assertion failure in WITHIN GROUP patch

create table big(a int);
insert into big select generate_series(10000000,1,-1);
vacuum big;
vacuum big;
select percentile_cont(0.5) within group (order by a) from big;


TRAP: FailedAssertion("!(pointer != ((void*)0))", File: "mcxt.c", Line:
699)
LOG:  server process (PID 18750) was terminated by signal 6: Aborted
DETAIL:  Failed process was running: select percentile_cont(0.5) within
group (order by a) from big;

Regards,
    Jeff Davis

Jeff Davis <pgsql@j-davis.com> writes:
> TRAP: FailedAssertion("!(pointer != ((void*)0))", File: "mcxt.c", Line:
> 699)
> LOG:  server process (PID 18750) was terminated by signal 6: Aborted
> DETAIL:  Failed process was running: select percentile_cont(0.5) within
> group (order by a) from big;

Argh.  I'd meant to go back and test that code path in
tuplesort_skiptuples(), but forgot to.  Fixed, thanks.

            regards, tom lane