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Connect to Google Spanner Data in Ruby
Connect to Google Spanner data in Ruby with ruby-dbi, dbd-odbc, and ruby-odbc.
The CData ODBC Driver for Google Spanner makes it easy to integrate connectivity to live Google Spanner data in Ruby. This article shows how to create a simple Ruby app that connects to Google Spanner data, executes a query, and displays the results.
Create an ODBC Connection to Google Spanner 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.
Google Spanner uses the OAuth authentication standard. To authenticate using OAuth, you can use the embedded credentials or register an app with Google.
See the Getting Started guide in the CData driver documentation for more information.
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 Google Spanner Data
Create a new Ruby file (for example: GoogleSpannerSelect.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 GoogleSpanner Source','','')
#execute a SELECT query and store the result set
resultSet = cnxn.execute("SELECT Name, TotalDue FROM Customer")
#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 Google Spanner data with Ruby. To do so, simply run your file from the command line:
ruby GoogleSpannerSelect.rb
Writing SQL-92 queries to Google Spanner allows you to quickly and easily incorporate Google Spanner data into your own Ruby applications. Download a free trial today!
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Google Spanner ODBC Driver
The Google Cloud Spanner ODBC Driver is a powerful tool that allows you to connect with live Spanner Cloud databases, directly from any applications that support ODBC connectivity.
Access Google Cloud Spanner like you would any other RDBMS - read, write, and update through a standard ODBC Driver interface.
Data Connectors
ETL/ ELT Solutions
Cloud & API Connectivity
OEM & Custom Drivers