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A comment on Cost of a Join. Parent comment

Re:Cost of a Join by talaketu on Wednesday August 15, 2018 @12:41AM (#17763807)
I don't buy "enum is a relation" any more than "VARCHAR is a relation" or "REAL is a relation". These just data types that represent the domain or range of possible values that may participate in a relation.
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Re:Cost of a Join by mbrameld on Wednesday August 15, 2018 @02:35AM (#17764131)
> that represent the domain or range of possible values that may participate in a relation

Like a foreign key constraint?

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