I need to order a table by start and end dates, where null values should
be interpreted as "prior to all values" for start dates and "later than
all values" for end dates.
This could be realized with "nulls first", "nulls last", but it seems
this did not make it into SQLAlchemy yet (ticket #723).
A workaround (for PostgreSQL) would be something like this:
order_by coalesce(start, timestamp '-infinity'),
coalesce(end_date, timestamp 'infinity')
But I don't find how to construct this with SQLAlchemy. Any ideas? Any
better solutions?
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