First Look: JDBC and InterSystems Databases

JDBC: How to Use It with InterSystems IRISCopy link to this section

InterSystems provides a fully compliant (JDBC 4.2), pure Java, type 4 JDBC driver, which is a single standalone JAR file with no dependencies. If you are already familiar with JDBC, and have a JDK 1.8 installed, all you need to do is to add the JDBC driver to your local CLASSPATH (see JDBC: Exploring It). The JDBC URL (connection string) is:

jdbc:IRIS://ipAddress:superserverPort/namespace

where the variables represent the InterSystems IRIS instance host’s IP address, the instance’s superserver port, and a namespace on the instance.

If you are connecting to an instance on the local machine (either using a hostname of localhost or an IP address of 127.0.0.1), the connection can use a special, high-performance local connection called a shared memory connection. For more information about shared memory connections, see “JDBC: What’s Unique about Shared Memory Connections”.

The point of this document is to give you a taste of using JDBC with InterSystems IRIS without bogging you down in details, so we’ve kept this exploration simple. When you bring InterSystems IRIS to your production systems, though, there are many things you will need to do differently, such as in regard to (but not limited to) security. So be sure not to confuse this exploration of InterSystems IRIS with the real thing! The sources provided at the end of this document will give you a good idea of what’s involved in using JDBC with InterSystems IRIS in production.

JDBC: Part of InterSystems IRIS Java Connectivity OptionsCopy link to this section

The InterSystems IRIS JDBC driver is the core InterSystems IRIS Java component, and supports traditional relational (SQL) access. It also provides the connection mechanism for Java calls that use the InterSystems IRIS Native API for Java, which accesses the data in its natively stored format. For Java integration based on objects, InterSystems IRIS also provides a separate feature — the InterSystems IRIS XEP component.

Taken all together, InterSystems IRIS provides a unique set of capabilities to use the same physical connection and transaction context to manipulate data using multiple paradigms: native, relational, and object-oriented. For more complex applications, InterSystems fully supports Hibernate. Enabling all these forms of connectivity — InterSystems IRIS XEP, Hibernate, and also the InterSystems IRIS Spark Connector — is the InterSystems IRIS JDBC driver.

JDBC: Exploring ItCopy link to this section

We’ve developed a demo that shows you how to work with JDBC and InterSystems IRIS — and how straightforward that is.

Please note that this code does not demonstrate the improved performance power of the InterSystems Java shared memory connection, because it does not deal with the large volumes of data that the shared memory connection can handle so efficiently.

Want to try an online video-based demo of InterSystems IRIS Java development and interoperability features? Check out the Java QuickStart!

Try the Sample CodeCopy link to this section

Cut and paste the sample code into your IDE, updating the url and connection variables and the username and password with the connection settings described for your instance in InterSystems IRIS Basics: Connecting an IDE. .

import java.sql.*;

public class JDBCSample {
    public static void main(String[] str) throws Exception {
        String url = "jdbc:IRIS://127.0.0.1:1972/USER";

        Class.forName("com.intersystems.jdbc.IRISDriver");
        Connection connection = DriverManager.getConnection(url,"_SYSTEM","SYS");
        // Replace _SYSTEM and SYS with a username and password on your system

        String createTable = "CREATE TABLE People(ID int, FirstName varchar(255), LastName varchar(255))";
        String insert1 = "INSERT INTO People VALUES (1, 'John', 'Smith')";
        String insert2 = "INSERT INTO People VALUES (2, 'Jane', 'Doe')";
        String query = "SELECT * FROM People";

        Statement statement = connection.createStatement();
        statement.executeUpdate(createTable);
        statement.executeUpdate(insert1);
        statement.executeUpdate(insert2);
        ResultSet resultSet = statement.executeQuery(query);
        System.out.println("Printing out contents of SELECT query: ");
        while (resultSet.next()) {
            System.out.println(resultSet.getString(1) + ", " + resultSet.getString(2) + ", " + resultSet.getString(3));
        }
        resultSet.close();
        statement.close();
        connection.close();
    }
}

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If the connection and queries have completed successfully, you should see a console window containing the results of the SELECT query.

Learn More about JDBCCopy link to this section

To learn more about JDBC, other Java interoperability technologies in InterSystems IRIS, and other related topics, see:

• “InterSystems Java Connectivity Options” in Using Java JDBC with InterSystems IRIS — overview of all InterSystems IRIS Java technologies enabled by the JDBC driver.

  Using Java with the InterSystems JDBC Driver — InterSystems documentation: step-by-step instructions for using JDBC.

• First Look: XEP Object Persistence with InterSystems IRIS — InterSystems documentation: Java XEP First Look

• First Look: InterSystems IRIS Native API for Java — InterSystems documentation: InterSystems IRIS Native API First Look

• Java Overview — InterSystems online learning: introductory video

• Persisting Java Objects with InterSystems XEP — InterSystems documentation: step-by-step instructions for using XEP

• InterSystems Implementation Reference for Java Third Party APIs — InterSystems documentation: connecting to InterSystems IRIS using JDBC, Hibernate, and Spark.

• Using the InterSystems Spark Connector — InterSystems documentation: using InterSystems IRIS as an Apache data source

• Hibernate and JDBC compared — Stack Overflow article