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Connect to SAP HANA Data in JRuby
Create a simple JRuby app with access to live SAP HANA data.
JRuby is a high-performance, stable, fully threaded Java implementation of the Ruby programming language. The CData JDBC Driver for SAP HANA makes it easy to integrate connectivity to live SAP HANA data in JRuby. This article shows how to create a simple JRuby app that connects to SAP HANA data, executes a query, and displays the results.
Configure a JDBC Connection to SAP HANA Data
Before creating the app, note the installation location for the JAR file for the JDBC Driver (typically C:\Program Files\CData\CData JDBC Driver for SAP HANA\lib).
JRuby natively supports JDBC, so you can easily connect to SAP HANA and execute SQL queries. Initialize the JDBC connection with the getConnection function of the java.sql.DriverManager class.
Set the Server, Database and Port properties to specify the address of your SAP Hana database to interact with. Set the User and the Password properties to authenticate to the server.
Built-in Connection String Designer
For assistance in constructing the JDBC URL, use the connection string designer built into the SAP HANA JDBC Driver. Either double-click the JAR file or execute the jar file from the command-line.
java -jar cdata.jdbc.saphana.jar
Fill in the connection properties and copy the connection string to the clipboard.
Below is a typical JDBC connection string for SAP HANA:
jdbc:saphana:User=system;Password=mypassword;Server=localhost;Database=systemdb;
Create a JRuby App with Connectivity to SAP HANA Data
Create a new Ruby file (for example: SAPHANASelect.rb) and open it in a text editor. Copy the following code into your file:
require 'java'
require 'rubygems'
require 'C:/Program Files/CData/CData JDBC Driver for SAP HANA 2018/lib/cdata.jdbc.saphana.jar'
url = "jdbc:saphana:User=system;Password=mypassword;Server=localhost;Database=systemdb;"
conn = java.sql.DriverManager.getConnection(url)
stmt = conn.createStatement
rs = stmt.executeQuery("SELECT Name, OwnerId FROM Buckets")
while (rs.next) do
puts rs.getString(1) + ' ' + rs.getString(2)
end
With the file completed, you are ready to display your SAP HANA data with JRuby. To do so, simply run your file from the command line:
jruby -S SAPHANASelect.rb
Writing SQL-92 queries to SAP HANA allows you to quickly and easily incorporate SAP HANA data into your own JRuby applications. Download a free trial today!
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