Grzegorz Jaƛkiewicz wrote:
also, how hard would it be to implement "CREATE ASSERTION", and where
do you see it (and maybe Tom could anwer that one too).
Would you say, it would be possible for someone with my knowledge of
postgresql internals (vague), but with very good C to do it

I think you could do it using the constraint trigger mechanism.

But PostgreSQL internals knowledge will be more important than excellent C skills, I guess.


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