one possible implementation
http://www.pgsql.cz/index.php/PL/pgSQL_%28en%29#Usage_of_PL.2FpgSQL_functions_for_designing_own_operators
Pavel
On 08/11/2007, hubert depesz lubaczewski <depesz@depesz.com> wrote:
> is it just a simple ommission, or am i missing something?
>
> we have interval / float8 ( = interval), so i think that adding interval
> / interval ( = float8) should be possible.
>
> depesz
>
> --
> quicksil1er: "postgres is excellent, but like any DB it requires a
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>
> ---------------------------(end of broadcast)---------------------------
> TIP 9: In versions below 8.0, the planner will ignore your desire to
> choose an index scan if your joining column's datatypes do not
> match
>