Re: Re: [HACKERS] triggered data change violation

> A "triggered data change violation" happens everytime you change twice
> within a transaction a value (column) that is part of a foreign key
> constraint (don't recall exactly which part).
> 
> This error shouldn't really happen, but I recall there were some
> implementation and definition problems with deferred constraints.
> 
> ...FAQ alert...

Yes, I just got it in the TODO list a few weeks ago:

* INSERT & UPDATE/DELETE in transaction of primary key fails with  deferredTriggerGetPreviousEvent or "change
violation"[foreign]
 

I personally think we could do better on the wording of that error
message, at least until we get it fixed.

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