Horton

Re: CREATE FOREGIN TABLE LACUNA

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Peter Eisentraut <peter_e@gmx.net>
Cc: Robert Haas <robertmhaas@gmail.com>, David Fetter <david@fetter.org>, PG Hackers <pgsql-hackers@postgresql.org>
Date: 2012-03-14T21:38:12Z
Lists: pgsql-hackers 
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