Albert Cervera Areny wrote:
I've got a query similar to this: select * from t1, t2 where t1.id > 158507 and t1.id = t2.id;That took > 84 minutes (the query was a bit longer but this is the part that made the difference) after a little change the query took ~1 second:select * from t1, t2 where t1.id > 158507 and t2.id > 158507 and t1.id = t2.id;
Try posting EXPLAIN ANALYSE SELECT ... for both of those queries and we'll see why it's better at the second one.
-- Richard Huxton Archonet Ltd
