Re: Problems with PostgreSQL DBI-Link / DBD-ODBC

Hi David!

Thanks for the fast reply. So you mean that I might already have created
a connection but am still trying to create the same one again?
>>Check whether the existing one works :)
So how can I test it?

What is the correct way of accessing this data source in a select statement?

Concerning the documents, I wouldn't say that they are unclear about
make_accessor_functions(). The problem is, that in the dbi-link
documents (quote: "Do the following, with the appropriate parameters.
"Appropriate parameters" come from the perldoc of the appropriate
DBD...") and in the dbi-odbc documents I can't find any information
about the correct use of the parameters for the ODBC-connection. That's
why I tried to create the connection so many times.

Regards,

Pit

David Fetter wrote:
> On Mon, Oct 29, 2007 at 03:44:05PM +0100, Pit M. wrote:
>> I have the following problem with PostgreSQL and hope you guys can
>> help me out in this matter: I try to get a remote connection to any
>> database (e.g. MS-SQL or MS Access) using DBI-Link and DBD:ODBC. My
>> problem is, that everything seems fine so far, however I don't know
>> how to use the parameters for "make_accessor_functions()". I
>> searched the net for it, but can only find samples for
>> Perl-Scripting, but I need a sample for using it directly in SQL.
>>
>> This is what I've come up so far. Hope you can point me to the right
>> direction.
>>
>> SELECT make_accessor_functions(
>> 'dbi:ODBC:Northwind::dbi_link.data_source,
>> 'sa'::text,
>> NULL::text,
>> '---
>> AutoCommit: 1
>> RaiseError: 1
>> '::dbi_link.yaml,
>> NULL::dbi_link.yaml,
>> NULL::text,
>> NULL, ::text,
>> 'Northwind'::text
>> );
>>
>>
>> I have a ODBC connection named "Northwind".
>>
>> The error message I'm always receiving (for the MS-SQL sample) is:
>>
>> ERROR: error from Perl function: error from Perl function: duplicate key
>> violates unique constraint "dbi_connection_data_source_key" at line 94.
>> at line 35.
>> SQL state: XX000
>
> It looks like you're trying to connect the same data_source and
> user_name twice. Check whether the existing one works :)
>
> Are the documents unclear on the idea that you only run
> make_accessor_functions() once per remote (data_source,user_name)
> pair per local database?
>
> Cheers,
> David.