| From: | David Rowley <david(dot)rowley(at)2ndquadrant(dot)com> |
|---|---|
| To: | "Jonathan S(dot) Katz" <jkatz(at)postgresql(dot)org> |
| Cc: | Dagfinn Ilmari Mannsåker <ilmari(at)ilmari(dot)org>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: PostgreSQL 12 Beta 1 press release draft |
| Date: | 2019-05-23 05:45:23 |
| Message-ID: | CAKJS1f-a1zNs8k6A=TysB9c1ksGWz_w0Hw7YGdw8nG3uHCiQkg@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Thu, 23 May 2019 at 15:31, Jonathan S. Katz <jkatz(at)postgresql(dot)org> wrote:
> Attached is
> v3 of the patch, along with a diff.
Minor details, but this query is not valid:
> WITH c AS MATERIALIZED (
> SELECT * FROM a WHERE a.x % 4
> )
> SELECT * FROM c JOIN d ON d.y = a.x;
a.x % 4 is not a boolean clause, and "a" is not in the main query, so
a.x can't be referenced there.
How about:
WITH c AS MATERIALIZED (
SELECT * FROM a WHERE a.x % 4 = 0
)
SELECT * FROM c JOIN d ON d.y = c.x;
--
David Rowley http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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