[GENERAL] any way for ORDER BY x to imply NULLS FIRST in 8.3?

[rihad]

Is there any way to "hardcode" the NULL handling in an index (as  per 
http://www.postgresql.org/docs/8.3/static/indexes-ordering.html) so that 
SELECT * FROM t ORDER BY foo automatically implies NULLS FIRST (and, 
similarly so that SELECT * FROM t ORDER BY foo DESC automatically 
implies NULLS LAST)? Thing is, I'm using PHP Symfony/Propel to generate 
their SQL and have no easy way to influence how they do so.

Thanks.
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