True. Btw., is there a particular value in pg_get_constraintdef always printing double pairs of parentheses for CHECK constraints?
No, but it will require some restructuring of the code to get rid of it safely (where "safely" is defined as "never omitting any parentheses that *are* necessary"). For the moment I'm willing to live with the ugliness. You could consider pretty-printing (pass true to pg_get_constraintdef) if you think visual appeal is better than assured correctness.
We could check the first character of the definition, and if it isn't a left parenthesis, then we add parentheses.
Chris
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