Re: [PATCHES] Enums patch v2 - Mailing list pgsql-hackers

From Peter Eisentraut
Subject Re: [PATCHES] Enums patch v2
Date
Msg-id 200612191058.49304.peter_e@gmx.net
Whole thread Raw
Responses Re: [PATCHES] Enums patch v2  (Tom Dunstan <pgsql@tomd.cc>)
List pgsql-hackers
Heikki Linnakangas wrote:
> I'm sorry I missed the original discussions, but I have to ask: Why
> do we want enums in core? The only potential advantage I can see over
> using a look-up table and FK references is performance.

The difference is that foreign-key-referenced data is part of your data
whereas enums would be part of the type system used to model the data.

An objection to enums on the ground that foreign keys can accomplish the
same thing could be extended to object to any data type with a finite
domain.

--
Peter Eisentraut
http://developer.postgresql.org/~petere/

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