Currently the list of changes for CQL relations in 1.2 is:
'scr' is deprecated in favour of '=' as the server choice relation.
'eq' is used for all equality; string, numeric or otherwise.
'adj' is used for word adjacency.
'exact' is deprecated.
While we're changing relation semantics, I'd like to propose that <> be
deprecated in favour of 'ne' for not equal to, to be consistent with
'eq' for equality.