Frequently one wants a data set returned in the same order as the
index used in the query. Informix (at least) has implicit order-by,
which means that the data will be returned in collating order if the
query forces use of the appropriate index.
Does Postgresql have this?
If not, does an Order-by force a sort even if an index has the correct
order to satisfy the order-by?
Thanks
John Moore
