Will query on PK read entire partition?

[Oskar Kjellin]

If I have a table like this:

PRIMARY KEY ((userid),deviceid)

And I query
SELECT * FROM devices where userid= ? and deviceid = ?

Will cassandra read the entire partition for the userid? So if I lots of
tombstones for userid, will they get scanned?

I guess this depends on how the bloomfilter is working. Does it contain
partitioning key or primary key?

We're using 2.0.17 if it matters.

/Oskar