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Re: [COMMITTERS] pgsql: Implement multivariate n-distinct coefficients - Mailing list pgsql-hackers

From Robert Haas
Subject Re: [COMMITTERS] pgsql: Implement multivariate n-distinct coefficients
Date
Msg-id CA+Tgmobb0_6o2KfY8ezVKozJ0jCadL1DapxLY9PJufc3g5MHcQ@mail.gmail.com
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Responses Re: [COMMITTERS] pgsql: Implement multivariate n-distinctcoefficients  (Alvaro Herrera <alvherre@2ndquadrant.com>)
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On Fri, Mar 24, 2017 at 1:16 PM, Alvaro Herrera <alvherre@alvh.no-ip.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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