-- callers won't be using an index: fix this?
CREATE INDEX /*i*/cl_sortkey ON /*_*/categorylinks (cl_to,cl_type,cl_sortkey,cl_from);
--- Not really used?
+-- Used by the API (and some extensions)
CREATE INDEX /*i*/cl_timestamp ON /*_*/categorylinks (cl_to,cl_timestamp);
--- For finding rows with outdated collation
+-- FIXME: Not used, delete this
CREATE INDEX /*i*/cl_collation ON /*_*/categorylinks (cl_collation);
--