Re: opposite of chr(int)

On Thu, Oct 6, 2011 at 4:15 PM, Gary Chambers <gwchamb@gwcmail.com> wrote:

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