| From: | Richard Broersma Jr <rabroersma(at)yahoo(dot)com> |
|---|---|
| To: | Michael Fuhr <mike(at)fuhr(dot)org> |
| Cc: | SQL Postgresql List <pgsql-sql(at)postgresql(dot)org> |
| Subject: | Re: Celko's Puzzle Number 5 |
| Date: | 2006-07-08 15:20:22 |
| Message-ID: | 20060708152022.73354.qmail@web31810.mail.mud.yahoo.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-sql |
> 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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