IDS Forum

Re: Can Informix access Sql Server table?

Posted By: Art Kagel
Date: Wednesday, 6 March 2013, at 8:47 a.m.

In Response To: RE: Can Informix access Sql Server table? (John Adamski)

OK, to maintain the two ODBC connections simultaneously he will have to
spawn separate threads before connecting and connect to SQL Server in one
thread and Informix in the other passing data and control information
between the threads using memory and mutexes. If that doesn't work, he
will have to use separate processes, one for each database, communicating
via shared memory and semaphores or global mutexes.

Either way, I think that he will only need to use CDC on the SQL Server
side.

Art

Art S. Kagel
Advanced DataTools (www.advancedatatools.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 my employer, Advanced DataTools, 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 Wed, Mar 6, 2013 at 7:57 AM, John Adamski <adamski@graceland.edu> wrote:

> >From what I understand the developer needs from Informix side to read a
> record
> on the SQL Server table then update Informix table(s) based on the SQL
> server
> record and then finally update the SQL server record it was processed. He's
> also is trying this from the SQL server side and has the sql that works,
> but
> only if he manually runs the sql. If he puts the sql in a job or trigger he
> gets errors as the ODBC connection to Informix is not opened. At least
> that is
> my understanding of the situation/problem.
>
> John
>
> -----Original Message-----
> From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On Behalf Of Art
> Kagel
> Sent: Tuesday, March 05, 2013 2:21 PM
> To: ids@iiug.org
> Subject: Re: Can Informix access Sql Server table? [29710]
>
> If you only need to go from SQL Server to Informix and not bi-directional,
> then you don't need the Informix CDC API, only the SQL Server one. The
> inserts, updates, and deletes to the Informix copy will be 'normal' SQL
> layer
> statements. You only need the CDC on the MS side to capture the changes.
>
> Art
>
> Art S. Kagel
> Advanced DataTools (www.advancedatatools.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 my employer, Advanced DataTools, 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, Mar 5, 2013 at 2:59 PM, John Adamski <adamski@graceland.edu>
> wrote:
>
> > Hmmmm, looks like you need to run syscdcv1.sql to generate a database
> > to use CDC API, which if I'm reading right comes with Informix since
> > 11.50. It looks like our ERP did not provide that with the Informix
> > installer they sent us.
> >
> > Oh, yippee I get to go beg them for it and have them turn me down like
> > they did with the data blades.
> >
> > It does seem to be exactly what the developer needs.
> >
> > Thanks everyone for your suggestions.
> >
> > John
> >
> > -----Original Message-----
> > From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On Behalf Of
> > Art Kagel
> > Sent: Tuesday, March 05, 2013 11:24 AM
> > To: ids@iiug.org
> > Subject: Re: Can Informix access Sql Server table? [29707]
> >
> > Sounds like a perfect application of CDC and the API is not complex.
> > You create a stand-alone app which uses the API to connect to the SQL
> > Server database, register the tables and operations it wants to be
> > notified about with a callback function for each and wait for
> > messages. It would trap for inserts, updates, and/or deletes take the
> > data it gets and either add it directly to the Informix side with a
> > direct connection, hand it off to a separate thread connected to
> > Informix, or pipe the data to a separate app connected to Informix to
> handle
> that side.
> >
> > Art
> >
> > Art S. Kagel
> > Advanced DataTools (www.advancedatatools.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 my employer, Advanced DataTools, 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, Mar 5, 2013 at 12:11 PM, John Adamski <adamski@graceland.edu>
> > wrote:
> >
> > > Art,
> > >
> > > Thanks for this info will research and also pass on to the developer.
> > >
> > > He is now trying to do what he needs from the SQL server side but is
> > > getting and error which I'm guessing has to do with the way SQL
> > > server triggers work and it is not 'opening' a connection to Informix.
> > >
> > > Here is the developers last email to me.
> > >
> > > Since it sounds like going from Informix to SQL is going to take a
> > > while and may include some costly purchases I am trying to go the
> > > other way SQL to Informix.
> > >
> > > Basically just using a simple trigger that takes any rows inserted
> > > into the SQL table and writing them to a table in Informix.
> > >
> > > If I run this code manually with a where clause it works fine insert
> > > into CX.cars.informix.cus_cf_answers (SubmissionID, ItemID,
> > > AnswerValue) select SubmissionID, ItemID, AnswerValue from
> > > CUS_CF_Answers where SubmissionID =
> > > '64166500-0CD4-40FF-8989-046263B6E83C'
> > >
> > > but as a trigger using the INSERTED table I get the error below.
> > >
> > > The trigger code:
> > > CREATE trigger [dbo].[i_cus_cf_answers] ON [dbo].[CUS_CF_Answers]
> > > AFTER INSERT AS --do not return any results SET NOCOUNT ON BEGIN
> > > insert into CX.cars.informix.cus_cf_answers
> > >
> > > (SubmissionID, ItemID, AnswerValue) select SubmissionID, ItemID,
> > > AnswerValue from INSERTED END
> > >
> > > Here is the error I get when I insert into the SQL table.
> > >
> > > The operation could not be performed because OLE DB provider
> "Ifxoledbc"
> > > for
> > > linked server "CX" was unable to begin a distributed transaction.
> > >
> > > Any ideas what we would need to change to fix this error?
> > >
> > > -----Original Message-----
> > > From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On Behalf
> > > Of Art Kagel
> > > Sent: Tuesday, March 05, 2013 8:07 AM
> > > To: ids@iiug.org
> > > Subject: Re: Can Informix access Sql Server table? [29695]
> > >
> > > There is another option. You can use CDC (Change Data Capture) to
> > > replicate the SQL Server table(s) to Informix either by coding it
> > > yourself
> > > - the CDC API is an open one and supported by both SQL Server and
> > > Informix so you could make it bi-directional - or using a 3rd party
> > > tool - DbMoto comes to mind or IBM's CDC product. This will be less
> > > expensive than EGM.
> > >
> > > Art
> > >
> > > Art S. Kagel
> > > Advanced DataTools (www.advancedatatools.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 my employer, Advanced DataTools, 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, Mar 5, 2013 at 8:51 AM, John Adamski <adamski@graceland.edu>
> > > wrote:
> > >
> > > > Oh, pooh, we looked at EGM for another project about 5 years ago
> > > > and was out of our price range. That was what I was thinking that
> > > > was not going to be able to help the developer.
> > > >
> > > > Thanks everyone, I now go get to rain on the developer's parade.
> > > > :-)
> > > >
> > > > John
> > > >
> > > > -----Original Message-----
> > > > From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On Behalf
> > > > Of Art Kagel
> > > > Sent: Monday, March 04, 2013 11:12 AM
> > > > To: ids@iiug.org
> > > > Subject: Re: Can Informix access Sql Server table? [29674]
> > > >
> > > > The only way you can do that would be to purchase the Infomrix
> > > > Enterprise Gateway product.
> > > >
> > > > Art
> > > >
> > > > Art S. Kagel
> > > > Advanced DataTools (www.advancedatatools.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 my employer, Advanced DataTools,
> > > > 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 Mon, Mar 4, 2013 at 11:45 AM, John Adamski
> > > > <adamski@graceland.edu>
> > > > wrote:
> > > >
> > > > > Informix:
> > > > > HPUX 11.31 (iiiv3) on HP BL870c IA server IDS 11.70.FC4 SQL Server:
> > > > > W2k8 r2 SP1 on Vsphere 5 cluster SQL Server 2008 r2
> > > > >
> > > > > One of our developers has asked me to help him setup "whatever
> > > > > is
> > > needed"
> > > > > so
> > > > > from Informix he can access data on a SQL Server table. We
> > > > > already have the other direction (SQL server accessing Informix
> > > > > data) setup and working using odbc on the sql server.
> > > > >
> > > > > I'm still clarifying with the developer if he needs only read
> > > > > access or read/write access to the SQL server table from Informix.
> > > > >
> > > > > I don't know if this is possible, is it? If so how do I connect
> > > > > the two databases? What tools/software do I need?
> > > > >
> > > > > A SQL server friend said I might be able to use SQL Server
> > > > > Integration Service
> > > > > (SSIS) but he has never used it so wasn't sure. I have never
> > > > > heard of it so know even less. :-)
> > > > >
> > > > > John Adamski, Sr. Network Specialist Graceland University, 1
> > > > > University Place, Lamoni, IA 50140 adamski@graceland.edu
> > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > >
> > >
> > >
> >
> >
> >
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>
> *******************************************************************************
> > > > > Forum Note: Use "Reply" to post a response in the discussion forum.
> > > > >
> > > > >
> > > >
> > > > --bcaec54b48d0489c3c04d71c745b
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> > > > Forum Note: Use "Reply" to post a response in the discussion forum.
> > > >
> > > >
> > >
> > > --f46d042d051c91e3f304d72df251
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> > > Forum Note: Use "Reply" to post a response in the discussion forum.
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> *******************************************************************************
> > > Forum Note: Use "Reply" to post a response in the discussion forum.
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> > >
> >
> > --bcaec554d232b2576304d730bdb6
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> *******************************************************************************
> > Forum Note: Use "Reply" to post a response in the discussion forum.
> >
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> *******************************************************************************
> > Forum Note: Use "Reply" to post a response in the discussion forum.
> >
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> --f46d0408395d45bd3204d733359f
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> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
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> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
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--f46d042d051c7f7e1404d741d237

Messages In This Thread

• Can Informix access Sql Server table?
  John Adamski -- Monday, 4 March 2013, at 11:45 a.m.
  • Re: Can Informix access Sql Server table?
    Art Kagel -- Monday, 4 March 2013, at 12:12 p.m.
    • RE: Can Informix access Sql Server table?
      John Adamski -- Tuesday, 5 March 2013, at 8:51 a.m.
      • Re: Can Informix access Sql Server table?
        Art Kagel -- Tuesday, 5 March 2013, at 9:06 a.m.
        • Re: Can Informix access Sql Server table?
          Paul Watson -- Tuesday, 5 March 2013, at 9:16 a.m.
        • Re: Can Informix access Sql Server table?
          Keith Simmons -- Tuesday, 5 March 2013, at 10:50 a.m.
          • Re: Can Informix access Sql Server table?
            Art Kagel -- Tuesday, 5 March 2013, at 10:58 a.m.
        • RE: Can Informix access Sql Server table?
          John Adamski -- Tuesday, 5 March 2013, at 12:11 p.m.
          • Re: Can Informix access Sql Server table?
            Art Kagel -- Tuesday, 5 March 2013, at 12:24 p.m.
            • RE: Can Informix access Sql Server table?
              John Adamski -- Tuesday, 5 March 2013, at 2:59 p.m.
              • Re: Can Informix access Sql Server table?
                Art Kagel -- Tuesday, 5 March 2013, at 3:20 p.m.
                • RE: Can Informix access Sql Server table?
                  John Adamski -- Wednesday, 6 March 2013, at 7:57 a.m.
                  • Re: Can Informix access Sql Server table?
                    Art Kagel -- Wednesday, 6 March 2013, at 8:47 a.m.
                    • Re: Can Informix access Sql Server table?
                      Art Kagel -- Wednesday, 6 March 2013, at 8:53 a.m.
      • Re: Can Informix access Sql Server table?
        Mike Aubury -- Tuesday, 5 March 2013, at 9:52 a.m.
  • RE: Can Informix access Sql Server table?
    Alexandre Marini -- Monday, 4 March 2013, at 12:15 p.m.

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