Re: ODBC + Dynamic cursors

Dear Mr. Inoue,

- Keyset driven cursors did the trick
- Thank you for pointing out to set the attribute at the statement level
- SQLSetPos() functionality basically does what I want to.

Regards,

Amanjit Gill
Software Developer
Medical and Bioinformatics
UFK (Gynecology and Obstetrics)
University Clinic Charite
Berlin

-----Ursprüngliche Nachricht-----
Von: pgsql-odbc-owner@postgresql.org
[mailto:pgsql-odbc-owner@postgresql.org] Im Auftrag von Hiroshi Inoue
Gesendet: Donnerstag, 31. Juli 2003 02:01
An: Amanjit Gill
Cc: pgsql-odbc@postgresql.org
Betreff: Re: [ODBC] ODBC + Dynamic cursors


Amanjit Gill wrote:
>
> Hi, I have written a C++ ODBC wrapper that right now runs on
> Oracle,Access,SQL Server, Sybase. I am right now investigating
> PostgreSQL which we want to use instead of SQL Server.
>
> PostgreSQL Version: 7.33 (Cygwin/Windows XP) using ipc-daemon
> ODBC Version:     7.03.01.10
> OS:                       Windows XP Pro, SP1
>
> Synopsis:
> I basically open a connection to a db, create a statement,use a
> dynamic cursor via SQLSetConnectAttr (SQL_ATTR_CURSOR_TYPE,
> SQL_CURSOR_DYNAMIC),

Please set the SQL_ATTR_CURSOR_TYPE attribute for statement handles not
for connection handles. Also note that psqlodbc driver doesn't support
dynamic cursors. Please use keyset-driven or static cursors instead.

[snip]

> Another question: are positionable updates and deletes (which means
> SQLSetPos) possible with
> PostgreSQL at present (as mentioned in
> http://msdn.microsoft.com/library/default.asp?url=/library/en-us/odbc/
> ht
> m/odch12pr_2.asp) ?

No. What the driver supports is to update/delete/insert/.. a row
(rows) in a rowset using SQLSetPos(.., .., SQL_UPDATE/DELETE/ADD, ..
Positioned update/delete means updat/deleting a row in a rowset by
executing a query such as UPDATE/DELETE ... WHERE CURRENT OF .... Please
note that the examples in the page you specified are updat/deleting a
row using SQLExecute.

regards,
Hiroshi Inoue
    http://www.geocities.jp/inocchichichi/psqlodbc/

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