Hi!
Thank you everyone for your responses. I investigated them.
I have also found composite type operators [1]. There is no way to
tell the EXCEPT operator to use *= as its equality operator? *EXCEPT
would seem to be a useful operator to have. :-) I am not sure about
performance though. EXCEPT is generally fast, but probably because it
can use indices, not sure how fast *= is, given that it is comparing
binary representations. What is experience with this operator of
others?
Mitar
[1] https://www.postgresql.org/docs/current/functions-comparisons.html#COMPOSITE-TYPE-COMPARISON
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