(cat_id = :cat OR (:cat = 0 AND cat_id IS NULL)) AND
ttrss_counters_cache.owner_uid = :uid AND
ttrss_feeds.owner_uid = :uid");
(cat_id = :cat OR (:cat = 0 AND cat_id IS NULL)) AND
ttrss_counters_cache.owner_uid = :uid AND
ttrss_feeds.owner_uid = :uid");