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The HBase ODBC Driver is a powerful tool that allows you to connect with Apache HBase columnar databases, directly from any applications that support ODBC connectivity.

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

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Connect to HBase Data in Ruby


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

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

Create an ODBC Connection to HBase 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.

Set the Port and Server to connect to Apache HBase.

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 HBase Data

Create a new Ruby file (for example: ApacheHBaseSelect.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 ApacheHBase Source','','') #execute a SELECT query and store the result set resultSet = cnxn.execute("SELECT SUM(CustomerName), Price FROM Customers GROUP BY Price") #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 HBase data with Ruby. To do so, simply run your file from the command line:

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