create table posts ( id serial primary key, view_count integer default 0 not null, vote_count integer default 0 not null ); create index on posts((case view_count when 0 then 0 else vote_count::float / view_count end)); class Post(SQL_DB.meta): __table__ = sa.Table('posts', SQL_DB.meta.metadata, autoload=True) I need to query Post, ordered by vote_count/view_count with use of index.
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