[R] How to connect Microsoft Sql server from R studio using freeTDS instead of RODBC package

Mark Sharp
Mon, 29 Aug 2016 19:23:03 -0000

Manu,

I believe you are mistaken regarding using freeTDS instead of RODBC.
shinyapps.io apparently has freeTDS drivers already installed. I am guessing
that either you have not configured your connections string
(odbcDriverConnect("driver = FreeTDS; ...")) correctly or your
database server has a firewall rule that is not allowing a connection from
shinyapps.io.

However, please note, I have not used shinyapps.io and am making these guesses
based on my experience with RODBC and the documentation I have read. You will
want to find someone with shinyapps.io experience.

Mark

R. Mark Sharp, Ph.D.
Director of Primate Records Database
Southwest National Primate Research Center
Texas Biomedical Research Institute
P.O. Box 760549
San Antonio, TX 78245-0549
Telephone: (210)258-9476
e-mail: msharp at TxBiomed.org

On Aug 29, 2016, at 12:26 PM, Manohar Reddy <manu.reddy52 at gmail.com>
wrote:
>
> Hi Mark,
>
>
>   Thank you so much for reply, using exiting ODBC drivers I will make a
connection  to sql server and it?s working fine in my local, but as per
shinyapps.io I need to use freeTDS drivers instead RODBC ,so that I may not
encounter the any issue .For me here challenging work is how to install freeTDS
on my machine and how to configure it?
>
>
>      Is there any drivers/way that can i  make a connection to sql server
and I shouldn?t encounter the issue after deploying application on shinyapps.io.
>
>
> Thanks,Manu.
>
>
> On Mon, Aug 29, 2016 at 9:35 PM, Mark Sharp <msharp at txbiomed.org>
wrote:
> Manu,
>
> Read the first paragraph under section "1 ODBC Concepts" of
https://cran.r-project.org/web/packages/RODBC/vignettes/RODBC.pdf. This
describes the relationship among the various parts of the technical stack that
allows connectivity to the database system via ODBC. One of the points made is
that RODBC uses an ODBC driver (e.g., Actual Technologies, Easysoft and
OpenLink).
>
> I use the driver from Actual Technologies on Mac OS, but many others have
used freeTDS. I had trouble with freeTDS years ago and decided my time was worth
the minor cost of using the commercial product from Actual Technologies.
>
> The driver you use is computer OS specific while RODBC is not.
>
> It is also convenient to use an ODBC manager, which is typically a
graphical application used to create and manage the configuration files used by
the ODBC driver.
>
> Mark
>
> R. Mark Sharp, Ph.D.
> Director of Primate Records Database
> Southwest National Primate Research Center
> Texas Biomedical Research Institute
> P.O. Box 760549
> San Antonio, TX 78245-0549
> Telephone: (210)258-9476
> e-mail: msharp at TxBiomed.org
>
> > On Aug 28, 2016, at 11:53 PM, Manohar Reddy <manu.reddy52 at
gmail.com> wrote:
> >
> > Hi,
> >
> >
> >
> >   Can anyone guide me how to connect the Microsoft Sql server 2012/14
from
> > R studio using freeTDS package instead of RODBC ,I can able to connect
the
> > MS Sql server from R studio using RODBC.
> >
> >  Actually my requirement is I have developed webpage/report using
Shiny
> > package then I was deployed it on Shinyapps.io ,but after deploying
I?m
> > encountering error like ??ERROR: *first argument is not an open RODBC
> > channel*? ,based on this error message I did searched in google and
found
> > that we need to use freeTDS drivers instead of RODBC but I found some
> > articles regarding freeTDS but it?s not useful for me.
> >
> >
> >
> > I was eagerly waiting for solution from someone since last month, but
not
> > yet and this issue is not allowing me to further .Can anyone please
help me
> > out me(how to install freeTDS and how to configure it) on same.
> >
> >
> >
> > My environment details :
> >
> >
> >
> >    Os : windows 8
> >
> >    R version 3.3.1 (2016-06-21)
> >
> >
> >
> > Thanks in Advance .
> >
> > Manu.
> >
> > [[alternative HTML version deleted]]
> >
> > ______________________________________________
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> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
>
>
>
>
>
>
>
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>
> --
>
>
> Thanks,
> Manohar Reddy P
> +91-9705302062.

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