Hannu Krosing <[EMAIL PROTECTED]> writes:
> How easy/hard would it be to create unique indexes on tinterval (unique
> here meaning non-overlapping) ?

"Overlapping" is not an equality relation (it fails the transitive law),
so I'm not entirely sure what "unique" means in this context ... but I
can promise you you can't make it work with btree.

                        regards, tom lane

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