Re: BUG #8451: quantile extension: memory corruption?

On 13.9.2013 18:07, stephane(dot)wustner(at)lip6(dot)fr wrote:
> The following bug has been logged on the website:
>
> Bug reference: 8451
> Logged by: strexxx
> Email address: stephane(dot)wustner(at)lip6(dot)fr
> PostgreSQL version: 9.1.9
> Operating system: Linux 3.8.0-27-generic #40-Ubuntu SMP x86_64
> Description:
>
> A query such as this one
> COPY (SELECT e,quantile(EXTRACT(EPOCH
> FROM(d)),ARRAY[0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1]) AS d FROM (SELECT
> e,max(time)-min(time) AS d FROM bb RIGHT JOIN (SELECT s,e FROM ss RIGHT JOIN
> (SELECT e FROM ee WHERE h ~* 'blah') AS i0 USING(e)) AS i0 USING
> (sessionid) GROUP BY e,ei) AS i1 GROUP BY e) TO 'full_path/d.csv' WITH
> CSV;"

Hi,

this seems like a bug in the "quantile" extension, which is developed
and distributed completely separately from PostgreSQL. So pgsql-bugs is
not the right place to report the issue.

I reported the issue on github and I'll look into that today/tomorrow

https://github.com/tvondra/quantile/issues/4

so far it seems like a trivial bug in handling NULL values.

regards
Tomas