Re: [SQL] can't cast varchar as integer?

Thanks for the replies so far. I had been using cast(foo::text as
integer).

To clarify my question, does anyone know *why* I can't cast from varchar
to integer? Why should I have to cast to text first?

thanks

On Tuesday, May 14, 2002, at 04:47 PM, David Stanaway wrote:

> On Tue, 2002-05-14 at 13:56, Scott Royston wrote:
>> Mac OSX, postgresql 7.2.1
>>
>> what's the reasoning behind not being able to cast a varchar as
>> integer? this seems very weird to me:
>>
>> LEDEV=# create table test (foo varchar(5), bar text);
>> LEDEV=# insert into test (foo, bar) values ('123', '123');
>> LEDEV=# select cast(foo as integer) from test;
>> ERROR: Cannot cast type 'character varying' to 'integer'
>> LEDEV=# select cast(bar as integer) from test;
>> bar
>> -----
>> 123
>> (1 row)
>
>
> Try this:
>
> scratch=# select foo::text::integer from test;
> foo
> -----
> 123
> (1 row)
>
>
> Or:
>
> scratch=# select int4(foo) from test;
> int4
> ------
> 123
> (1 row)
>
>
>
> --
> David Stanaway
>