Personal tools

HDBC-ODBC under Windows

From HaskellWiki

Revision as of 12:06, 31 July 2013 by Gauthier (Talk | contribs)

Jump to: navigation, search

A brief description of how to get HDBC-ODBC working under windows, for connecting to things like MS SQL server.

1 Install

  • Ensure your path contains the ghc bin directory:
    • Right click on My Computer, select Properties -> Advanced -> Environment variables -> change the variable 'Path'
  • Download and install MDAC/ODBC Software Development Kit, from a link on this page:
    http://www.microsoft.com/en-us/download/details.aspx?id=5793
  • Download and unpack the most recent versions of hdbc and hdbc-odbc hackage.haskell.org
  • Follow the README instructions for installing hdbc
  • Follow the README instructions for installing hdbc-odbc, with these changes:
    • The include-dirs line should be changed to:
      include-dirs: . "C:\\Program Files\\Microsoft Data Access SDK 2.8\\Libs\\x86"
    • Do the following at a command prompt, with the hdbc-odbc directory being current directory:
          ghc --make -o setup Setup.hs
          setup configure
          setup build
          setup install

Alternatively, as of the latest hackage build (HDBC-odbc-2.2.3.2) performing a cabal build works using:

          cabal update
          cabal install HBC-odbc

You may need other ODBC drivers, but often they will be installed already on a development box that has the database server installed.

2 Test

You can test it from a ghci prompt (obviously you'll need to change the connection string and query):

Prelude> :m Database.HDBC
Prelude Database.HDBC> :m + Database.HDBC.ODBC
Prelude Database.HDBC Database.HDBC.ODBC> let connectionString =  "Driver={SQL Server};Server=myserver;Database=mydatabase;Trusted_Connection=yes;"
Prelude Database.HDBC Database.HDBC.ODBC> let ioconn = connectODBC connectionString
Prelude Database.HDBC Database.HDBC.ODBC> do { conn <- ioconn; vals <- quickQuery conn "SELECT TOP 10 * FROM mytable;" []; print vals }
[[SqlString "1",SqlString "Copy",...