Dave Page wrote:
>
>> Does anyone know of client code that actually pays attention to
>> pg_attribute rows with negative attnums?
>
> pgAdmin certainly knows about them, but I don't believe it'll break
> if they go.
It only knows that attnum < 0 must be a system column; no specific
knowledge or interpretation of it.
Would those columns remain selectable for debugging/maintenance
purposes, despite not appearing in system catalogs?
Regards,
Andreas