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

From: "Pit M(dot)" <fmi-soft(at)gmx(dot)de>
To: pgsql-general(at)postgresql(dot)org
Subject: Re: Problems with PostgreSQL DBI-Link / DBD-ODBC
Date: 2007-10-30 12:12:41
Message-ID: fg773l$v3d$ (view raw, whole thread or download thread mbox)
Lists: pgsql-general
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.



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.

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