Andreas Joseph Krogh, 05.02.2013 11:15:
Andreas Joseph Krogh, 05.02.2013 10:57:
> The value of having NOT NULL deferrable is, well, to not check for
> NULL until the tx commits. When working with ORMs this often is the
> case, especially with circular FKs.
With circular FKs it's enough to define the FK constraint as deferred.
I meant; circular FKs which are also NOT NULL
A deferrable FK is still enough for that scenario as you can insert FK values that do not yet exist.
See Alban's answer for an example.
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