Some special cases of index interval bounds are created from operators, such as $exists. The base transformation of intervals to match expressions in SERVER-104501 in these cases would create comparison expressions. Another special, but probably common case, is the $in operator which creates a disjunction of values from the OIL, not the original $in.

Check if this transformation is sufficient from the performance and accuracy perspective.

If not, add specific transformation rules.

The specific match expressions are:

• $in -> [v1] U [v2] U ...
• {$exists : false} -> [null, null]
• internal comparison expressions