| From: | Richard Huxton <dev(at)archonet(dot)com> |
|---|---|
| To: | Andrew Dunstan <andrew(at)dunslane(dot)net> |
| Cc: | Martijn van Oosterhout <kleptog(at)svana(dot)org>, Kenneth Marshall <ktm(at)is(dot)rice(dot)edu>, Peter Eisentraut <peter_e(at)gmx(dot)net>, pgsql-hackers(at)postgresql(dot)org, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Robert Treat <xzilla(at)users(dot)sourceforge(dot)net>, Gregory Stark <stark(at)enterprisedb(dot)com> |
| Subject: | Re: column ordering, was Re: [PATCHES] Enums patch v2 |
| Date: | 2006-12-20 14:36:32 |
| Message-ID: | 45894A70.4020509@archonet.com |
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| Lists: | pgsql-hackers pgsql-patches |
Andrew Dunstan wrote:
>
> Or we could divide the positive number space in two, by starting at 2^14
> (attnums are int2). Then a simple bitmask test would work to distinguish
> them.
Perhaps divide-by-four, then it would be possible to have calculated
columns (as mentioned recently on one of the lists). In particular, that
would let you have FK constraints with a constant as part of the key.
--
Richard Huxton
Archonet Ltd
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