When the database's collation is not "C", the DB order is not the same as the
Rust order. As such, asserting that the elements are in increasing order fails.
However, since both queries get the order from the database, they should be in
the same order.
With too many users, the query had a giant filter `IN (u1, u2, u3,
...)`. In PostgreSQL, we can pass the users as an array instead, but that
doesn't work with SQLite. Instead, we repeat the filter from the
previous query to get the same users/groups, as a subquery.
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