If you make an opclass that orders in the reverse order you can use that
opclass in creating the index (which effectively can give you an index
like x, y desc by using the new opclass on y). There was some talk
recently about whether we should provide such opclasses as builtins or
contrib items.
Ah! Nice :-) I did not think about it...
Thanks a lot for the hit!
Dima
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