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The Avro ODBC Driver is a powerful tool that allows you to connect with live data from Avro, directly from any applications that support ODBC connectivity.

Access Avro data like you would a database - read, write, and update through a standard ODBC Driver interface.

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Connect to Avro Data in Ruby


Connect to Avro data in Ruby with ruby-dbi, dbd-odbc, and ruby-odbc.

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

Create an ODBC Connection to Avro 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.

Connect to your local Avro file(s) by setting the URI connection property to the location of the Avro file.

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 Avro Data

Create a new Ruby file (for example: AvroSelect.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 Avro Source','','') #execute a SELECT query and store the result set resultSet = cnxn.execute("SELECT Id, Column1 FROM SampleTable_1 WHERE Column2 = 'value_2'") #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 Avro data with Ruby. To do so, simply run your file from the command line:

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