Re: quick question about PreparedStatements - Mailing list pgsql-jdbc

From Barry Lind
Subject Re: quick question about PreparedStatements
Date
Msg-id 3F3295FD.5040204@xythos.com
Whole thread Raw
In response to Re: quick question about PreparedStatements  (Felipe Schnack <felipes@ritterdosreis.br>)
List 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   |
>>>>+------------------------------+---------------------------------------------+
>>>>
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>>>
>>>
>>>
>>
>
>
>
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