using limit instead of seeking
| От | admin |
|---|---|
| Тема | using limit instead of seeking |
| Дата | |
| Msg-id | Pine.BSF.4.10.9912091610320.8952-100000@server.b0x.com обсуждение исходный текст |
| Ответы |
indices don't make much difference
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| Список | pgsql-general |
Would there be any reasonable performance gain in using LIMIT in an sql query to print pages of results, instead of seeking to the desired record and printing a number of records in a while loop? I have tried both options, but I cannot perceive any significant change in performance. Is there a way I can actuall test or predict the usefulness of using one alternative over the other? I am also using SORT in my sql queries, so perhaps the db server will have to retrieve all records beforehand anyways in order to perform the sort. In such a case, I guess using LIMIT wouldn't make much of a difference. On the other hand, there are perhaps cases when using LIMIT would make a difference. Any guidance would be appreciated to solving this problem. Thanks in advance, Marc
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