Re: Looking for comments - Mailing list pgsql-sql

From Peter Eisentraut
Subject Re: Looking for comments
Date
Msg-id Pine.LNX.4.30.0101021802260.758-100000@peter.localdomain
Whole thread Raw
In response to Re: Looking for comments  (Thomas SMETS <tsmets@altern.org>)
List pgsql-sql
Thomas SMETS writes:

> <snip>
> ISBN's have a checkdigit; it would be sensible to provide a
> function to be used in a CHECK constraint to ensure that the
> ISBN is valid.
> </snip>
>
> OK I'll start searching for it but haven't implemented yet

In the PostgreSQL distribution there's a directory contrib/isbn_issn that
defines a couple of data types that might help you.

-- 
Peter Eisentraut      peter_e@gmx.net       http://yi.org/peter-e/



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