Most databases allow ordinal numbers as expressions in order by clauses,
some even in group by clauses. And in earlier versions of SQLAlchemy it
had in fact been possible to express these as integers, e.g.
query.order_by(1, 3, desc(2)).
However, in version 0.7.1 this yields an "SQL expression object or
string expected" error. To make use of this feature you now need to
write query.order_by('1', '3', desc('2')) which is not so readable and
convenient as the above. Has this been changed by intent?
I know, using ordinals has some drawbacks and may be considered a bad
habit, but they can still be useful in some situations. E.g. it makes it
possible to decorate arbitrary queries of the same structure for use in
an autosuggest AJAX controller with an "order_by(1)".
-- Christoph
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