Re: FULL JOIN: macaddr equality is not a mergejoinable join

I think this will be fixed in 7.2 because we have more cidr/inet
comparison operators.

> Try this:
>
> create table interface ( mac macaddr, primary key(mac) );
>
> insert into interface (mac) values ('00:11:22:33:44:55');
> insert into interface (mac) values ('00:11:22:33:44:5a');
> insert into interface (mac) values ('00:11:22:33:44:5f');
>
> create table host (
> mac macaddr,
> ip inet,
> foreign key (mac) references interface,
> primary key (ip)
> );
>
> insert into host ( mac, ip ) values ('00:11:22:33:44:55', '192.168.1.1');
> insert into host ( mac, ip ) values (null, '192.168.1.2');
>
> select * from interface full join host using (mac);
> ERROR:  FULL JOIN is only supported with mergejoinable join conditions
>
>
> If you replace the "macaddr" columns with "varchar(17)":
>
>         mac        |     ip
> -------------------+-------------
>  00:11:22:33:44:55 | 192.168.1.1
>  00:11:22:33:44:5a |
>  00:11:22:33:44:5f |
>                    | 192.168.1.2
>
>
> Why? This seems like a bug. Running on postgresql 7.1.3, compiled from the
> source RPM on the download site. If people could CC any replies to my email,
> I'd be grateful.
>
>
> --
> Regards,
> Phil
>
> +------------------------------------------+
> | Phil Mayers                              |
> | Network & Infrastructure Group           |
> | Information & Communication Technologies |
> | Imperial College                         |
> +------------------------------------------+
>
>
>
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