Connect Using the SAP HANA JDBC Driver

Ensure that you installed a Java Development Kit (JDK) and make sure it is accessible from your path. Details on which Java versions are supported can be found in SAP note 2939501 - SAP HANA Client Supported Platforms for 2.5 and later and Oracle Java SE Support Roadmap.

• Java JDK such as Java SE 11 (LTS)

• A SAP supported version of the OpenJDK

To verify that it is correctly set up, run the following:

java -version
javac -version

If these commands fail, ensure that the folder they are located in, is included in your path.

The SAP HANA driver for JDBC is a Multi-Release JAR file and as such supports multiple versions of Java. It is available in the client installation folder at C:\SAP\hdbclient\ngdbc.jar and in the maven repository.

1. Run the following command for version information. If needed, adjust the path to match the installation location on your machine.

   java -jar C:\SAP\hdbclient\ngdbc.jar -v
   

   java -jar ~/sap/hdbclient/ngdbc.jar -v
   

2. Run the command again without the -v to open the configuration window, which provides driver information and the ability to set trace information:

   

   The JDBC driver has a different version number than the rest of the SAP HANA interfaces.

   The trace options are further described at JDBC Tracing and Trace Options.

3. Run the following after replacing your_host and your_port to execute a simple query:

   java -jar C:\SAP\hdbclient\ngdbc.jar -u USER1,Password1 -n your_host:your_port -o encrypt=True -o validatecertificate=false -c "SELECT  * FROM HOTEL.CUSTOMER"
   

   java -jar ~/sap/hdbclient/ngdbc.jar -u USER1,Password1 -n your_host:your_port -o encrypt=True -o validatecertificate=false -c "SELECT  * FROM HOTEL.CUSTOMER"
   

   

See JDBC Command-Line Connection Options for additional details on parameters of ngdbc.jar.

1. Create a folder named java, enter the newly created directory, create a file named JavaQuery.java, and open the file in notepad.

   mkdir %HOMEPATH%\HANAClientsTutorial\java
   cd %HOMEPATH%\HANAClientsTutorial\java
   notepad JavaQuery.java
   

   Substitute pico below for your preferred text editor.

   mkdir -p $HOME/HANAClientsTutorial/java
   cd $HOME/HANAClientsTutorial/java
   pico JavaQuery.java
   

2. Copy the following code into JavaQuery.java:

   import java.sql.*;
   public class JavaQuery {
       public static void main(String[] argv) {
           Connection connection = null;
           try {  
               connection = DriverManager.getConnection(  
                   //"jdbc:sap://10.11.123.134:39015/?encrypt=true&validateCertificate=false", "User1", "Password1");
                   //As of SAP HANA Client 2.6, connections on port 443 enable encryption by default
                   //validateCertificate should be set to false when connecting
                   //to an SAP HANA, express edition instance that uses a self-signed certificate.
   
                   //The below URL gets the host, port and credentials from the hdbuserstore.
                   "jdbc:sap://dummy_host:0/?KEY=USER1UserKey&encrypt=true&validateCertificate=false");  
           }
           catch (SQLException e) {
               System.err.println("Connection Failed:");
               System.err.println(e);
               return;
           }
           if (connection != null) {
               try {
                   System.out.println("Connection to HANA successful!");
                   Statement stmt = connection.createStatement();
                   ResultSet resultSet = stmt.executeQuery("SELECT TITLE, FIRSTNAME, NAME from HOTEL.CUSTOMER;");
                   while (resultSet.next()) {
                       String title = resultSet.getString(1);
                       String firstName = resultSet.getString(2);
                       String lastName = resultSet.getString(3);
                       System.out.println(title + " " + firstName + " " + lastName);
                   }
               }
               catch (SQLException e) {
                   System.err.println("Query failed!");
               }
           }
       }
   }
   

3. Compile the .java file into a .class file using the following command:

   javac JavaQuery.java
   

4. Run JavaQuery.class and indicate where the SAP HANA JDBC driver is located. Note that the host, port, UID and PWD will be retrieved from the hdbuserstore.

   java -classpath C:\SAP\hdbclient\ngdbc.jar;. JavaQuery
   

   java -classpath ~/sap/hdbclient/ngdbc.jar:. JavaQuery
   

   

See JDBC Connection Options in Java Code for additional details on the getConnection method of the DriverManager.

The Eclipse IDE for Enterprise Java Developers includes a database source explorer that can be configured with a JDBC driver. The version of Eclipse can be confirmed by selecting Help | About Eclipse IDE.

The following steps demonstrate how to configure it to enable connections to SAP HANA.

1. Open the Data Source Explorer by choosing Window | Show View | Other | Data Management | Data Source Explorer

   

2. Create a connection profile for SAP HANA.

   

3. Select New Driver Definition.

   

4. Specify where to find the SAP HANA JDBC driver.

   

5. Specify the driver class name as com.sap.db.jdbc.Driver and the Connection URL.

   jdbc:sap://dummy_host:0/?KEY=USER1UserKey&encrypt=true&validateCertificate=false
   

   

   Validate the settings by selecting Test Connection before finishing the wizard.

6. Browse the database catalog and execute SQL queries.

   

   To execute SQL queries in eclipse, open SQL Scrapbook. SQL Scrapbook is similar to a SQL command line and allows you to query tables from inside eclipse.

   It can be opened by selecting the SQL Scrapbook icon from the right corner of the Data Source Explorer window.

   

Congratulations! You have now created and debugged a Java application that connects to and queries an SAP HANA database.