| From: | David Rowley <david(dot)rowley(at)2ndquadrant(dot)com> |
|---|---|
| To: | nospam-abuse(at)bloodgate(dot)com |
| Cc: | Simon Riggs <simon(at)2ndquadrant(dot)com>, Kyotaro HORIGUCHI <horiguchi(dot)kyotaro(at)lab(dot)ntt(dot)co(dot)jp>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, David Fetter <david(at)fetter(dot)org>, Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: multivariate statistics (v25) |
| Date: | 2017-04-05 22:16:41 |
| Message-ID: | CAKJS1f9HMeT+7adicEaU8heOMpOB5pKkCVYZLiEZje3DVutVPw@mail.gmail.com |
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| Lists: | pgsql-hackers |
On 6 April 2017 at 07:19, Tels <nospam-abuse(at)bloodgate(dot)com> wrote:
> I know I'm a bit late, but isn't the syntax backwards?
>
> "CREATE STATISTICS s1 WITH (dependencies) ON (col_a, col_b) FROM table;"
>
> These do it the other way round:
>
> CREATE INDEX idx ON table (col_a);
>
> AND:
>
> CREATE TABLE t (
> id INT REFERENCES table_2 (col_b);
> );
>
> Won't this be confusing and make things hard to remember?
>
> Sorry for not asking earlier, I somehow missed this.
The reasoning is in [1]
--
David Rowley http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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