Performance of multiple queries?

Поиск
Список
Период
Сортировка
От Leif K-Brooks
Тема Performance of multiple queries?
Дата
Msg-id 85d9a90905042102336d824c95@mail.gmail.com
обсуждение исходный текст
Ответы Re: Performance of multiple queries?  (Bruno Wolff III <bruno@wolff.to>)
Список pgsql-novice
I'm wondering about the performance of using one query versus several.
For instance, how much slower would several queries be:

SELECT name FROM table WHERE id=123;
SELECT value FROM table WHERE id=123;
SELECT type FROM table WHERE id=123;

As compared to one larger equivalent query:

SELECT name, value, type FROM table WHERE id=123;

It would be immensely easier for my application to use multiple small
queries so that it wouldn't need to worry about invalidating a cache
after a period of time, but if the performance hit would be too large,
I suppose I'll bite the bullet and write the annoying caching code.

В списке pgsql-novice по дате отправления:

Предыдущее
От: tövis
Дата:
Сообщение: localisation - collation sequencies
Следующее
От: Kalyanaraman Rajaraman
Дата:
Сообщение: Transaction processing performance