Re: quick question about PreparedStatements
От | Barry Lind |
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Тема | Re: quick question about PreparedStatements |
Дата | |
Msg-id | 3F3295FD.5040204@xythos.com обсуждение исходный текст |
Ответ на | Re: quick question about PreparedStatements (Felipe Schnack <felipes@ritterdosreis.br>) |
Список | pgsql-jdbc |
Felipe, Sort of both. If you are not using cursors then the limitation is in the driver, if you are using cursors or future use of the v3 fe/be protocol then the limitation is on the server. thanks, --Barry Felipe Schnack wrote: > Hm... ok, but (just curious) this is a backend or driver limitation? > > On Wed, 06 Aug 2003 19:57:37 -0700 > Barry Lind <blind@xythos.com> wrote: > > >>Yes you can only have one active result set per statement. >> >>--Barry >> >>Felipe Schnack wrote: >> >>> I don't know, maybe I just don't understand something about Prep. Statements, but why they have a reference to a ResultSetit has created? To me make more sense the opposite, the ResultSets reference the Statement... >>> Anyone can confirm I can only have one resultset per statement? >>> >>>On Fri, 25 Jul 2003 09:06:58 +0100 >>>Paul Thomas <paul@tmsl.demon.co.uk> wrote: >>> >>> >>> >>>>On 24/07/2003 19:55 Felipe Schnack wrote: >>>> >>>> >>>>> Can I use a single PreparedStatement to create various ResultSets and >>>>>get data from all of them at the same time? >>>> >>>>I don't think so. The Javadoc for Statement says: >>>> >>>>"By default, only one ResultSet object per Statement object can be open at >>>>the same time" >>>> >>>>To me, this suggests that some db's may allow multiple ResultSets per >>>>Statement but that such extensions would be non-portable. Looking at the >>>>source for AbstactJdbc1Statement, it has >>>> >>>>protected java.sql.ResultSet result = null; >>>> >>>>So it looks like PG has the one ResultSet to one Statement implementation. >>>> >>>>HTH >>>> >>>>-- >>>>Paul Thomas >>>>+------------------------------+---------------------------------------------+ >>>>| Thomas Micro Systems Limited | Software Solutions for the Smaller >>>>Business | >>>>| Computer Consultants | >>>>http://www.thomas-micro-systems-ltd.co.uk | >>>>+------------------------------+---------------------------------------------+ >>>> >>>>---------------------------(end of broadcast)--------------------------- >>>>TIP 3: if posting/reading through Usenet, please send an appropriate >>>> subscribe-nomail command to majordomo@postgresql.org so that your >>>> message can get through to the mailing list cleanly >>> >>> >>> >> > > > > /~\ The ASCII Felipe Schnack (felipes@ritterdosreis.br) > \ / Ribbon Campaign Analista de Sistemas > X Against HTML Cel.: 51-91287530 > / \ Email! Linux Counter #281893 > > Centro Universitário Ritter dos Reis > http://www.ritterdosreis.br > ritter@ritterdosreis.br > Fone: 51-32303341 >
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