CREATE INDEX logging_actor_time_backwards ON logging (log_timestamp, log_actor);
CREATE INDEX logging_page_time ON logging (log_namespace, log_title, log_timestamp);
CREATE INDEX logging_times ON logging (log_timestamp);
CREATE INDEX logging_actor_time_backwards ON logging (log_timestamp, log_actor);
CREATE INDEX logging_page_time ON logging (log_namespace, log_title, log_timestamp);
CREATE INDEX logging_times ON logging (log_timestamp);