Peter Eisentraut <peter_e@gmx.net> writes:
> On ons, 2012-03-14 at 17:16 -0400, Robert Haas wrote:
>> If a constraint is NOT ENFORCED, then the query planner presumably
>> won't rely on it for planning purposes
> Why do you presume that?
What does SQL:2011 say exactly about the semantics of NOT ENFORCED?
Is an implementation allowed to fail in undefined ways if a constraint
is marked NOT ENFORCED and is not actually true?
regards, tom lane