Re: "select count(*) from contacts" is too slow!
| От | Christopher Browne |
|---|---|
| Тема | Re: "select count(*) from contacts" is too slow! |
| Дата | |
| Msg-id | m3fzi48qyw.fsf@wolfe.cbbrowne.com обсуждение исходный текст |
| Ответ на | Re: "select count(*) from contacts" is too slow! ("Nigel J. Andrews" <nandrews@investsystems.co.uk>) |
| Ответы |
Re: "select count(*) from contacts" is too slow!
|
| Список | pgsql-general |
A long time ago, in a galaxy far, far away, nolan@celery.tssi.com wrote: >> MySQL can tell you from it's index because it doesn't care if it gives you the >> right number or not. > > Under what circumstances would MySQL give the wrong number? It would give the wrong number under _every_ circumstance where there are uncommitted INSERTs or DELETEs. -- select 'cbbrowne' || '@' || 'ntlug.org'; http://www3.sympatico.ca/cbbrowne/sap.html Appendium to the Rules of the Evil Overlord #1: "I will not build excessively integrated security-and-HVAC systems. They may be Really Cool, but are far too vulnerable to breakdowns."
В списке pgsql-general по дате отправления: