> "Tom" == Tom Lane writes:
Tom> Ron Mayer writes:
>> [1] http://archives.postgresql.org/pgsql-general/2006-11/msg01544.php
Tom> FWIW, the behavior has changed from the time of that discussion ---
Tom> we now track sort ordering using EquivalenceClasses, which are able
Tom> to distingu
Ron Mayer writes:
> [1] http://archives.postgresql.org/pgsql-general/2006-11/msg01544.php
FWIW, the behavior has changed from the time of that discussion ---
we now track sort ordering using EquivalenceClasses, which are able
to distinguish different instances of textually equal() volatile
expres
Andrew Gierth writes:
> If you try it using nextval(), you'll notice that the function does
> in fact get called twice per row, but one of the results is thrown
> away and replaced with the other one.
Yeah. The problem is that setrefs.c is generating a tlist for the
hashagg node in which both ou
> "Tom" == Tom Lane writes:
>> For bonus weirdness:
>> select distinct random(),random() from generate_series(1,10);
>> set enable_hashagg=off;
>> select distinct random(),random() from generate_series(1,10);
>> I think _that_ one is a bug.
Tom> Hmm. I think the first one is a bug -
Andrew Gierth writes:
> For bonus weirdness:
> select distinct random(),random() from generate_series(1,10);
> set enable_hashagg=off;
> select distinct random(),random() from generate_series(1,10);
> I think _that_ one is a bug.
Hmm. I think the first one is a bug --- the two invocations of
r
Andrew Gierth wrote:
> This query:
>
> select random() from generate_series(1,10) order by random();
> produces sorted output. Should it?
I recall a workaround from a different thread[1] if specifically
were looking for random ordering of random numbers is:
select random() from foo order
> "Tom" == Tom Lane writes:
>> This query:
>> select random() from generate_series(1,10) order by random();
>> produces sorted output.
>> Should it?
Tom> It always has; we'd doubtless break some apps if we changed that.
For bonus weirdness:
select distinct random(),random() from gener
Andrew Gierth writes:
> This query:
> select random() from generate_series(1,10) order by random();
> produces sorted output.
> Should it?
It always has; we'd doubtless break some apps if we changed that.
regards, tom lane
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This query:
select random() from generate_series(1,10) order by random();
produces sorted output. Should it?
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Andrew (irc:RhodiumToad)
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