Class JoinPromoter
A class to abstract away join promotion problems for complex filter conditions.
Declaration
class JoinPromoter
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Methods
▷ def __init__(self, connector, num_children, negated) ▷ def add_votes(self, votes) Add single vote per item to self.votes. Parameter can be any iterable.
▶ def update_join_types(self, query) Change join types so that the generated query is as efficient as
possible, but still correct. So, change as many joins as possible
to INNER, but don't make OUTER joins INNER if that could remove
results from the query.