Alban Hertroys <alban@xxxxxxxxxxxxxxxxx> writes: > I'd say "unique constraint violation" right here (provided there's a > unique constraint on this column, of course). The order in which these > are inserted/updated doesn't seem to matter either. I'm afraid I'm still > missing the point... The point is that btree depends on a number of assumptions about the behavior of the operators in an operator class, and one of those assumptions is that "equality" is transitive. regards, tom lane
