Re: Caching
От | snpe |
---|---|
Тема | Re: Caching |
Дата | |
Msg-id | 200308301202.h7UC2Ojw002737@mx1.verat.net обсуждение исходный текст |
Ответ на | Re: Caching (Fernando Nasser <fnasser@redhat.com>) |
Список | pgsql-jdbc |
What is server side prepared statement and how I used it in jdbc ? Thanks Haris Peco On Friday 29 August 2003 09:35 pm, Fernando Nasser wrote: > Yes, the current driver has setFetchSize() implemented. > > Note that you must be inside a transaction as a cursor is used for > implementing this. Alternatively you can be using a server side prepared > statement (you don't need to be inside a transaction in that case). > > If you are using an older driver, you can always declare a cursor yourself. > > Regards, > Fernando > > Lufkin, Brad wrote:> Whenever I execute a query and retrieve the results > with > > the sequence: > > ResultSet resultSet = statement.executeQuery("SELECT blah blah > > blah..."); > > while (resultSet.next()) { > > //do something with the resultSet > > } > > > > it looks like the query is completely carried out before any results are > > returned. This contrasts with the behavior of other databases (Informix > > comes to mind) where the query returns immediately and the results are > > returned as the database fetches them. Is my supposition correct, and, if > > so, is there any way to make postgres behave the same way as Informix? > > My reasons for wanting this behavior is that I'm displaying results in > > real time to a user through a GUI and the gradual display of results is > > preferable to a long pause followed by all the results at once. > > > > ---------------------------(end of broadcast)--------------------------- > > TIP 5: Have you checked our extensive FAQ? > > > > http://www.postgresql.org/docs/faqs/FAQ.html
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