Re: Function testing if a string is a number ?

Tom Lane a écrit :
> Arnaud Lesauvage <thewild@freesurf.fr> writes:
>> I am searching for a function that would return true if a string
>> is a number.
>> In Access I would have written IsNumeric('mystring'), but this
>> function does not exist in postgres.
>
> Write your own using a pattern test, for instance
>     varchar ~ '^[0-9]+$'
> See
> http://www.postgresql.org/docs/8.1/static/functions-matching.html

Oh yes ! Regular expressions !
I have to think about it now !!!

Thanks a lot Tom !

Regards
--
Arnaud