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IDS Forum

Re: Issue in transactions with informix using DRDA

Posted By: Marcus Haarmann
Date: Friday, 11 November 2016, at 9:49 a.m.

In Response To: Re: Issue in transactions with informix using DRDA (Art Kagel)

Hi Art,

I think you mix up distributed (XA) transactions and distributed SQL.
From my point of view, distributed SQL, as described in the feature list would be the access from one DB server
to another (such as select .... from database@foreignserver:table where ...).
In contrary, the XA transaction just addresses the management of global transaction IDs, which could include
also foreign database systems in the same transaction (e.g. you could have one Informix connection + one Postgres connection
in the same transaction, or alternatively two Informix connections to separate Instances, not knowing about each other).
The benefit is only the two phase commit to be consistent over separate data sources.
From my point of view, this is allowed in all editions (even Innovator can do that).
The thing we did not test is to do this with a DRDA driver (we are using the ifxjdbc driver always).
There should not be any difference in behaviour from the server side, unless DRDA checks
for some signs which are not respected by the ifxjdbc driver.

Marcus Haarmann

Von: "Art Kagel" <art.kagel@gmail.com>
An: "ids" <ids@iiug.org>
Gesendet: Mittwoch, 9. November 2016 01:05:01
Betreff: Re: Issue in transactions with informix using DRDA [38094]

What Informix Edition are you using? Some editions do not support
distributed transactions! Specifically only Enterprise and Advanced
Enterprise Edition support distributed transactions in production instances
and Developer Edition also but that Edition is not for production use. See
here:

http://www.ibm.com/developerworks/data/library/techarticle/dm-0801doe/index.html

Art

Art S. Kagel, President and Principal Consultant
ASK Database Management
www.askdbmgt.com

Blog: http://informix-myview.blogspot.com/

Disclaimer: Please keep in mind that my own opinions are my own opinions
and do not reflect on the IIUG, nor any other organization with which I am
associated either explicitly, implicitly, or by inference. Neither do
those opinions reflect those of other individuals affiliated with any
entity with which I am affiliated nor those of the entities themselves.

On Tue, Nov 8, 2016 at 6:53 PM, ROGER VILCA <rvilca@luzdelsur.com.pe> wrote:

> When I use XA transaction with .Net, the informix launchs this error:
>
> ERROR [IX000] [IBM][IDS/UNIX64] The database is not licensed for
> distributed
> data access.
>
> The informix error is -926.
>
> Best regards,
> Roger
>
>
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