Clark,

> So it would seem that naming rules for constraints in PostgreSQL
> isn't exactly compliant with SQL92.  I'm curious what sorts of
> constraints are enforced...

Correct.  Our uniqueness on constraints is:
schema_name | table_name | constraint_name

We're aware that it's a violation of SQL92, but there's no way for us to 
change it now without making it very hard for people to upgrade.  And, 
frankly, aside from the very occasional information_schema complaint, 
nobody seems to care.

-- 
--Josh

Josh Berkus
Aglio Database Solutions
San Francisco

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