>> How about this option: >> >> SELECT distinct ip_info.* FROM ip_info RIGHT JOIN network_events USING >> (ip) RIGHT JOIN host_events USING (ip) WHERE >> (network_events.name='blah' OR host_events.name = 'blah') AND >> ip_info.ip IS NOT NULL; MA> Nah, that seems to be much much worse. The other queries usually MA> return in 1-2 minutes, this one has been running for 30 minutes and MA> has still not returned I find that an OR involving two different fields (in this case even different tables) is faster when replaced by the equivalent UNION. In this case--- SELECT distinct ip_info.* FROM ip_info RIGHT JOIN network_events USING (ip) WHERE network_events.name='blah' AND ip_info.ip IS NOT NULL UNION SELECT distinct ip_info.* FROM ip_info RIGHT JOIN host_events USING (ip) WHERE host_events.name = 'blah' AND ip_info.ip IS NOT NULL; Moreover, at least through 8.1, GROUP BY is faster than DISTINCT.
