Connect to Oracle SCM Data in Ruby

The CData ODBC Driver for Oracle SCM makes it easy to integrate connectivity to live Oracle SCM data in Ruby. This article shows how to create a simple Ruby app that connects to Oracle SCM data, executes a query, and displays the results.

Create an ODBC Connection to Oracle SCM Data

If you have not already, first specify connection properties in an ODBC DSN (data source name). This is the last step of the driver installation. You can use the Microsoft ODBC Data Source Administrator to create and configure ODBC DSNs.

The following connection properties are required to connect to Oracle SCM data.

• Url: The URL of the account that you want to connect to. Typically, this will be the URL of your Oracle Cloud service. For example, https://servername.fa.us2.oraclecloud.com.
• User: The username of your Oracle Cloud service account.
• Password: The password of your Oracle Cloud service account.

Installing Ruby and Necessary Gems

If you do not have Ruby installed, refer to the Ruby installation page. With Ruby installed, you will need to install the ruby-dbi, dbd-odbc, and ruby-odbc gems:

gem install dbi
gem install dbd-odbc
gem install ruby-odbc

Create a Ruby App with Connectivity to Oracle SCM Data

Create a new Ruby file (for example: OracleSCMSelect.rb) and open it in a text editor. Copy the following code into your file:

#connect to the DSN
require 'dbi'
cnxn = DBI.connect('DBI:ODBC:CData OracleSCM Source','','')

#execute a SELECT query and store the result set
resultSet = cnxn.execute("SELECT CarrierId, CarrierName FROM Carriers WHERE ActiveFlag = 'false'")

#display the names of the columns
resultSet.column_names.each do |name|
 print name, "\t"
end
puts

#display the results
while row = resultSet.fetch do
 (0..resultSet.column_names.size - 1).each do |n|
 print row[n], "\t"
 end
 puts
end
resultSet.finish

#close the connection
cnxn.disconnect if cnxn

With the file completed, you are ready to display your Oracle SCM data with Ruby. To do so, simply run your file from the command line:

ruby OracleSCMSelect.rb

Writing SQL-92 queries to Oracle SCM allows you to quickly and easily incorporate Oracle SCM data into your own Ruby applications. Download a free trial today!