Re: CHAR to INT

Hello

2008/7/12 Martín Marqués <martin(dot)marques(at)gmail(dot)com>:
> I'm trying to make a PL function to pass from an alphanumeric string
> to a numeric one changing the chars in the string to it's ORD (the
> inverse of the chr function) and I'm stumbling with two problems:
>
> 1) How to know if the CHAR is numeric or not.
> 2) If it's not numeric I want to get it's ord, but I can't find
> something like that in PG.
>
postgres=# select '1' between '0' and '9';
?column?
----------
t
(1 row)

postgres=# select 'a' between '0' and '9';
?column?
----------
f
(1 row)

postgres=# select ascii('7') - ascii('0');
?column?
----------
7
(1 row)

Regards
Pavel Stehule

> Any ideas?
>
> --
> Martín Marqués
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> DBA, Programador, Administrador
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