In JDG 6.4, the protobuf format allows to specify which fields are indexed and which are not. However, once the cache is configured to have indexing enabled (some of the fields are indexed), client cannot opt-out for index-less query when it wants to query some of the non-indexed fields.

There is even a more complicated scenario when we want to run single query on both indexed and non-indexed fields, however, this would be even more tricky to implement.