Re: text to point conversion not working. ( cannot cast type text to point )

On Wed, Sep 27, 2006 at 08:14:29PM -0600, Dan Libby wrote:
> Hi all,
>
> Using pgsql 8.0.1
>
> I'm just starting with using the geometry data types in postgres, and ran into
> what seems like a very basic problem. Namely, I can't seem to convert/cast
> type text into type point when that text results from any expression. Ie, it
> *only* works for a plain string literal.

String literals are not text. You can however cheat a little like so:

# SELECT point_in( textout ( '1' || ',2' ) );
point_in
----------
(1,2)
(1 row)

textout turns a text value to a "string literal" (sort of) which is
then parsed by the point input function.

If you want you can encapsulate this into a function and create the
cast yourself.

Hope this helps,
--
Martijn van Oosterhout <kleptog(at)svana(dot)org> http://svana.org/kleptog/
> From each according to his ability. To each according to his ability to litigate.