From: | Gary Chambers <gwchamb(at)gwcmail(dot)com> |
---|---|
To: | Henry Drexler <alonup8tb(at)gmail(dot)com> |
Cc: | pgsql-novice(at)postgresql(dot)org |
Subject: | Re: opposite of chr(int) |
Date: | 2011-10-06 20:15:41 |
Message-ID: | alpine.DEB.2.00.1110061604420.30299@lollipop.garychambers.com |
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Lists: | pgsql-novice |
Henry,
> select
> case
> when substring('wallawa9kl',8,1) = '0' then 'true'
> when substring('wallawa9kl',8,1) = '1' then 'true'
> when substring('wallawa9kl',8,1) = '2' then 'true'
> when substring('wallawa9kl',8,1) = '3' then 'true'
> when substring('wallawa9kl',8,1) = '4' then 'true'
> when substring('wallawa9kl',8,1) = '5' then 'true'
> when substring('wallawa9kl',8,1) = '6' then 'true'
> when substring('wallawa9kl',8,1) = '7' then 'true'
> when substring('wallawa9kl',8,1) = '8' then 'true'
> when substring('wallawa9kl',8,1) = '9' then 'true'
> else 'false'
> end
> just wondering if there is something more compact or if this is an okay
> workaround solution.
How about:
CREATE OR REPLACE FUNCTION has_digit(text)
RETURNS boolean
LANGUAGE sql
AS $function$
select case when substring($1, '\d') is not null then true
else false
end
$function$
-- Gary Chambers
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