Carsten Kropf <ckropf2@xxxxxxxxx> writes: > I read somewhere, that this can be solved by preparing a operator class for btree and passing a comparison function for equality there. I did this with the following lines: > CREATE OPERATOR CLASS pointnd_btree_class > DEFAULT FOR TYPE pointnd USING btree AS > OPERATOR 3 =(pointnd, pointnd) > ; You need an actual, usable btree operator class, not one-sixth of one ... this is lacking the other four operators and the support function. regards, tom lane -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general