Hi, I was wondering what the best way is to lay column families out so that you can to query by a boolean attribute.
For example: create table x( id text, timestamp timeuuid, flag boolean, // other fields primary key (id, timestamp) ) So that you can query select * from x where flag = true; Three approaches spring to mind: 1) Put a secondary index on the flag column 2) Split the column family definition out into two separate CFs, one for true and one for false 3) Maintain a manual index table 4) Something else Option (1) seems to be the easiest, but I was wondering if that was going to put too much load on the secondary index, given the low cardinality of this attribute. It seems like what Cassandra would have to do internally to achieve (1) is to effectively implement (2) or (3) behind the scenes, but I'm just guessing. Does anybody have any experience with this? Cheers, Ben
