| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> |
| Cc: | "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [COMMITTERS] pgsql: Implement multivariate n-distinct coefficients |
| Date: | 2017-03-24 18:46:02 |
| Message-ID: | CA+Tgmobb0_6o2KfY8ezVKozJ0jCadL1DapxLY9PJufc3g5MHcQ@mail.gmail.com |
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On Fri, Mar 24, 2017 at 1:16 PM, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> wrote:
> Implement multivariate n-distinct coefficients
dromedary and arapaima have failures like this, which seems likely
related to this commit:
EXPLAIN
SELECT COUNT(*) FROM ndistinct GROUP BY a, d;
QUERY PLAN
---------------------------------------------------------------------
! HashAggregate (cost=225.00..235.00 rows=1000 width=16)
Group Key: a, d
! -> Seq Scan on ndistinct (cost=0.00..150.00 rows=10000 width=8)
(3 rows)
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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