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CREATE ASSERTION in future? CHECK subselect?

I've been hitting the DB books lately and I was wondering if anyone knows
where features like "CREATE ASSERTION" and sub-selects in CHECK
constraints stand in the TODO queue for production PgSQL. Are they even in
development at all? Or have they been written off as too expensive? I did
see somewhere that a developer version of the Pg server could be built
with CREATE ASSERTION enabled but that was NOT recommended for production
installs.

Also what is the status of CREATE DOMAIN?

Just wonderin'
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Jul 19 '05 #1
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