From: Richard Broersma Jr <rabroersma@yahoo.com>
To: Michael Fuhr <mike@fuhr.org>
Cc: SQL Postgresql List <pgsql-sql@postgresql.org>
Subject: Re: Celko's Puzzle Number 5
Date: Sat, 8 Jul 2006 08:20:22 -0700 (PDT)
Message-ID: <20060708152022.73354.qmail@web31810.mail.mud.yahoo.com> (raw)
In-Reply-To: <20060708115403.GA13518@winnie.fuhr.org>
> http://www.postgresql.org/docs/8.1/interactive/functions-matching.html
>
> Any of these CHECK expressions should work:
>
> CHECK (alpha_only SIMILAR TO '[A-Za-z]+')
> CHECK (alpha_only ~ '^[A-Za-z]+$')
> CHECK (alpha_only ~* '^[a-z]+$')
>
> Unfortunately, even though SIMILAR TO has been standard SQL for
> several years, not all databases implement it. Many databases
> do support regular expressions but generally via a non-standard
> syntax (as PostgreSQL does with its ~, ~*, !*, and !~* operators).
Thanks for the link!
Regards,
Richard Broersma Jr.
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To: pgsql-sql@postgresql.org
Cc: rabroersma@yahoo.com, mike@fuhr.org
Subject: Re: Celko's Puzzle Number 5
In-Reply-To: <20060708152022.73354.qmail@web31810.mail.mud.yahoo.com>
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