From: PG Doc comments form <noreply@postgresql.org>
To: pgsql-docs@lists.postgresql.org
Cc: eugene.losowskigallagher@googlemail.com
Subject: Constraint check is missing value check ARRAY
Date: Fri, 11 Sep 2026 19:09:38 +0000
Message-ID: <178915377800.2258529.262291845008098767@wrigleys.postgresql.org> (raw)
The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/18/ddl-constraints.html
Description:
Hi Documentation team
This page is missing the value check array.
https://www.postgresql.org/docs/current/ddl-constraints.html
Example:
CREATE TABLE demo
(
id bigint NOT NULL DEFAULT nextval('seq_ttelephone_id'::regclass),
usage character(1) NOT NULL DEFAULT 'M',
CONSTRAINT ck_ttelephone_usage_1 CHECK (usage = ANY
(ARRAY['M'::character(1),'H'::character(1),'W'::character(1),'F'::character(1)]))
NOT VALID
)
);
This is entirely missing from the documentation.
Key thing to point out is the type cast must match:
e.g. character(1) for type of character(1) etc
Please add this to the documentation, last knowledge on web for this is
10-years old, and this is a current feature of postgres (using 17.11
currently)
Many thanks
Eugene
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Subject: Re: Constraint check is missing value check ARRAY
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