Julien Rouhaud wrote:

> and you can instead make macaddr64 support both format, and provide a
> macaddr::macaddr64 cast

Having macaddr64 support both formats sounds nice, but how does it work?
Will we have to reserve one additional bit to select the representation?
That would make the type be 65 bits which is a clear loser IMO.

Is it allowed to just leave 16 bits as zeroes which would indicate that
the address is EUI48?  I wouldn't think so ...

Álvaro Herrera                https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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