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Presto’s JDBC interface is used to access Java application.
Prerequisites
Install presto-jdbc-0.150.jar
You can download the JDBC jar file by visiting the following link,
https://repo1.maven.org/maven2/com/facebook/presto/presto-jdbc/0.150/
After the jar file has been downloaded, add it to the class path of your Java application.
Create a Simple Application
Let’s create a simple java application using JDBC interface.
Coding − PrestoJdbcSample.java
import java.sql.*; import com.facebook.presto.jdbc.PrestoDriver; //import presto jdbc driver packages here. public class PrestoJdbcSample { public static void main(String[] args) { Connection connection = null; Statement statement = null; try { Class.forName("com.facebook.presto.jdbc.PrestoDriver"); connection = DriverManager.getConnection( "jdbc:presto://localhost:8080/mysql/tutorials", "tutorials", “"); //connect mysql server tutorials database here statement = connection.createStatement(); String sql; sql = "select auth_id, auth_name from mysql.tutorials.author”; //select mysql table author table two columns ResultSet resultSet = statement.executeQuery(sql); while(resultSet.next()){ int id = resultSet.getInt("auth_id"); String name = resultSet.getString(“auth_name"); System.out.print("ID: " + id + ";nName: " + name + "n"); } resultSet.close(); statement.close(); connection.close(); }catch(SQLException sqlException){ sqlException.printStackTrace(); }catch(Exception exception){ exception.printStackTrace(); } } }
Save the file and quit the application. Now, start Presto server in one terminal and open a new terminal to compile and execute the result. Following are the steps −
Compilation
~/Workspace/presto/presto-jdbc $ javac -cp presto-jdbc-0.149.jar PrestoJdbcSample.java
Execution
~/Workspace/presto/presto-jdbc $ java -cp .:presto-jdbc-0.149.jar PrestoJdbcSample
Output
INFO: Logging initialized @146ms ID: 1; Name: Doug Cutting ID: 2; Name: James Gosling ID: 3; Name: Dennis Ritchie
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