Re: even after laboriously following previous post, cannot cast from char to int

Lille Penguini <lille(dot)penguini(at)gmail(dot)com> writes:
> Re casting char columns to int, I've worked all the proposed solutions
> from previous
> post-gres mailing list
> posts<http://archives.postgresql.org/pgsql-general/2010-02/msg01078.php>,
> but to no avail.

> None of the ALTER TABLE proposed fixes worked for me, and now I have a new
> INTEGER type column created, I execute the following:

> UPDATE zip_code_data SET county_fips_rev = CAST(county_fips as INTEGER);

> ...and this is what I get:

> ERROR: invalid input syntax for type numeric: " "

> What is this telling me?

It's telling you you have a row in which the value is all blanks,
and that doesn't look enough like a number to satisfy the cast function.
You need to clean the data ...

regards, tom lane