Limitation, not bug. The reason ? On disk, data are sorted by type first, and FOR EACH type value, the data are sorted by id.
So to do an order by Id, C* will need to perform an in-memory re-ordering, not sure how bad it is for performance. In any case currently it's not possible, maybe you should create a JIRA to ask for lifting the limitation. On Thu, Sep 3, 2015 at 10:27 PM, Robert Wille <rwi...@fold3.com> wrote: > Given this table: > > CREATE TABLE import_file ( > roll int, > type text, > id timeuuid, > data text, > PRIMARY KEY ((roll), type, id) > ) > > This should be possible: > > SELECT data FROM import_file WHERE roll = 1 AND type = 'foo' ORDER BY id > DESC; > > but it results in the following error: > > Bad Request: Order by currently only support the ordering of columns > following their declared order in the PRIMARY KEY > > I am ordering in the declared order in the primary key. I don’t see why > this shouldn’t be able to be supported. Is this a known limitation or a bug? > > In this example, I can get the results I want by omitting the ORDER BY > clause and adding WITH CLUSTERING ORDER BY (id DESC) to the schema. > However, now I can only get descending order. I have to choose either > ascending or descending order. I cannot get both. > > Robert > >
