Re: Getting all unique keys

[kurt greaves]

You can SELECT DISTINCT in CQL, however I would recommend against such a
pattern as it is very unlikely to be efficient, and prone to errors. A
distinct query will search every partition for the first live cell, which
could be buried behind a lot of tombstones. It's safe to say at some point
you will run into serious issues. Selecting all the keys in a table purely
to see what exists is not going to be cheap, and sounds awfully like an
anti-pattern. Why do you need this behaviour?