Specifying Schema in JDBC Connection

Question

Hi Guys,
MaxDB provides the possibility to logically unite several database objects (e.g. Tables, Views, Indexes, ...) in so called "Schemas".
However, I couldn't find any documentation about how to connect to a certain schema via JDBC. How should the JDBC URL look like? Assuming I have this kind of URL jdbc:sapdb://localhost:7200/MAXDB. Is there a way to connect to the schema "DEMO"?
Thanks for the help.
Cheers,
Gerardo

Answer 1

Hi Gerardo,
yes, it's rather simple to change the currently active default schema.
The command for this is called SET CURRENT_SCHEMA = <SCHEMA_NAME>.
Using the HelloMaxDB example from the documenation this can be used like this.
import java.sql.*;
public class HelloMaxDB
     public static void main(String[] args)
     throws ClassNotFoundException, SQLException
          String username = "MONA";
          String password = "RED";
          String host = "";
          String dbname = "DB77";
   * Load JDBC Driver
          Class.forName ("com.sap.dbtech.jdbc.DriverSapDB");
   * Define Connection URL
          String url = "jdbc:sapdb://" + host + "/" + dbname;
   * Connect to the Database
          Connection connection = DriverManager.getConnection (url, username, password);
   * Execute SQL Statements
          Statement stmt = connection.createStatement ();
          ResultSet resultSet = stmt.executeQuery ("SELECT * FROM HOTEL.CUSTOMER");
          resultSet.next ();
          String hello = resultSet.getString (1);
        System.out.println ("SELECTED with schema name:");
          System.out.println (hello);
     * Change the default schema
        stmt.execute ( "SET CURRENT_SCHEMA=HOTEL");
          resultSet = stmt.executeQuery ("SELECT * FROM CUSTOMER");
          resultSet.next ();
          hello = resultSet.getString (1);
          System.out.println ("SELECTED without schema name:");
        System.out.println (hello);
          * close all objects
          resultSet.close ();
          stmt.close();
          connection.close ();
Actuallyl easy cheesy, isn't it?
Cheers,
Lars