В письме от 3 сентября 2017 11:45:43 пользователь Alvaro Herrera написал:
> I think we should split this in at least two commits,
Added another part for commit:
https://www.postgresql.org/message-id/43332102.S2V5pIjXRx@x200m
This one adds an enum relation option type.
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Do code for fun.