In MongoDB, can hashed shard keys improve query isolation on range queries?

Question

In Mongo docs, it says that

MongoDB automatically computes the hashes when resolving queries using hashed indexes. Applications do not need to compute hashes.

From here: http://docs.mongodb.org/manual/tutorial/choose-a-shard-key/

My common sense tells me that this can only be valid for EQUALS queries. Is this also valid for range queries? As hashing does not maintain order, I suppose not.

Example: Say I have a hashed shard key on field k. Definitely, it can help isolate a query like {k : 111}. Can it also help isolate a query like {k : {'$gt' : 111}} ?

Thanks in advance.

Answer 1

From the 3rd paragraph here: http://docs.mongodb.org/manual/core/index-hashed/

Hashed indexes do not support range queries.

Sorry - it can be frustrating, for sure.