无法通过Shinyapps.io连接到ODBC

Question

I build ar shiny app which uses the odbc library to fetch the data from server hosted in public server and shows the result output. It is working perfectly under Win10.

I am using the below code to connect to server:

library(odbc)
con <- dbConnect(odbc(),
                 Driver = "SQL Server Native Client 11.0",
                 Server = "****",
                 Database = "****",
                 UID = "****",
                 PWD = "****")

When I hosted the app in www.shinyapps.io it is not working. It shows the error as below:

Warning: Error in : nanodbc/nanodbc.cpp:950: 01000: [unixODBC][Driver Manager]Can't open lib 'SQL Server Native Client 11.0' : file not found 

I am unable to why it says 'file not found'? The app works perfectly when I run the app using rstudio from my PC.

Please help. Thanks in advance.

Sumanta

Answer 1

You have to use FreeTDS. I found either using 7.4 or 7.0 version.

try this using odbc:

    library(DBI)
    library(odbc)

    con <- dbConnect(
      odbc(),
      Driver      = "FreeTDS",
      Database    = database,
      Uid         = uid,
      Pwd         = pwd,
      Server      = server,
      Port        = 1433,
      TDS_Version = 7.4
    )

or this usind rodbc:

    library(RODBC)

    con <- odbcDriverConnect(
      'Driver=FreeTDS;
      TDS_Version=7.4;
      Server=<server>;
      Port=<port>;
      Database=<db>;
      Uid=<uid>;
      Pwd=<pw>;
      Encrypt=yes;
      TrustServerCertificate=no;
      Connection Timeout=30;')