Hello List!
I'm working on queries on embedded objects for Django-nonrel (more
precisely, djangotoolbox) that will use JOIN-like syntax.
For this, I need to know how to distinguish
.filter(spam__op=eggs, foo__op=bar)
from
.filter(spam__op=eggs).filter(foo__op=bar)
in the .where tree used in django.db.models.sql.query.Query.
My first idea was to guess the original query expression from the where
tree's structure, but I suspect that will work out for all kinds of
queries (using Q objects in particular).
So -- is it possible? How do the SQL backends decide when to do one JOIN
with two SELECTs or two JOINS with one SELECT each?
Thanks!
Jonas
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