Re: Typo in the Section "3.6. Inheritance"

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>
Cc: Michael Paquier <michael(at)paquier(dot)xyz>, 2552891(at)gmail(dot)com, Pg Docs <pgsql-docs(at)lists(dot)postgresql(dot)org>
Subject: Re: Typo in the Section "3.6. Inheritance"
Date: 2020-08-31 17:43:35
Message-ID: 20200831174335.GH13613@momjian.us
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On Fri, Aug 21, 2020 at 07:09:31PM -0700, David G. Johnston wrote:
> On Fri, Aug 21, 2020 at 4:36 PM Bruce Momjian <bruce(at)momjian(dot)us> wrote:
>
> On Wed, Aug  5, 2020 at 11:29:31PM -0700, David G. Johnston wrote:
>
> > Removing "char" from the tutorial is a nice side-effect that we probably
> want
> > to do even if we keep "state".
>
> I think CHAR(2) is fine because it is always 2 characters.
>
>
> You imply "it is always two non-blank characters" though that isn't what CHAR
> (2) means.  Adding CHECK (state ~ '^[A-Z]{2}$') and leaving the type as text
> would be best from a pure model perspective - but this isn't the place to teach
> that and for the same reason char(2) isn't terrible.
>
>
> How is the attached patch, based on your suggestions?
>
>
> Works for me.

Patch applied back through 9.5.

--
Bruce Momjian <bruce(at)momjian(dot)us> https://momjian.us
EnterpriseDB https://enterprisedb.com

The usefulness of a cup is in its emptiness, Bruce Lee

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