2008/7/3 Simon Riggs <simon@2ndquadrant.com>:
> I'm using the nvl() function from the orafce package. It is defined as a
> polymorphic function so its function signature is
> nvl(anyelement, anyelement)
>
> Now if I try to use the function in this very typical way
> nvl(numeric_col, 0)
>
> we get
>
> ERROR: function nvl(numeric, integer) does not exist
>
> The same error occurs if we have nvl(smallint, integer) etc
>
> This is a real shame 'cos polymorphic functions ought to be a great way
> of saving development time and catalog space, yet they seem to fall down
> a hole without implicit casting.
>
> What I'd like it to do is to recognise that the 0 should be cast
> implicitly to another datatype within the same family. I want and expect
> nvl(char_column, 0)
> to fail, but I expect the various numeric/integer types we have to play
> nicely together without tears.
>
> If we can do it for indexes, can we do it for polymorphic functions also
> when there is no matching function?
>
+1
there is similar problem with literal constant.
Pavel Stehule
> --
> Simon Riggs www.2ndQuadrant.com
> PostgreSQL Training, Services and Support
>
>
> --
> Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
> To make changes to your subscription:
> http://www.postgresql.org/mailpref/pgsql-hackers
>
