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ConnectToClusterExample.java

ConnectToClusterExample demonstrates how to connect to an Amazon Redshift cluster and run a sample query.

/** * Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved. * * This file is licensed under the Apache License, Version 2.0 (the "License"). * You may not use this file except in compliance with the License. A copy of * the License is located at * * http://aws.amazon.com/apache2.0/ * * This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR * CONDITIONS OF ANY KIND, either express or implied. See the License for the * specific language governing permissions and limitations under the License. */ package connection; import java.sql.*; import java.util.Properties; public class Docs { //Redshift driver: "jdbc:redshift://x.y.us-west-2.redshift.amazonaws.com:5439/dev"; //or "jdbc:postgresql://x.y.us-west-2.redshift.amazonaws.com:5439/dev"; static final String dbURL = "***jdbc cluster connection string ****"; static final String MasterUsername = "***master user name***"; static final String MasterUserPassword = "***master user password***"; public static void main(String[] args) { Connection conn = null; Statement stmt = null; try{ //Dynamically load driver at runtime. //Redshift JDBC 4.1 driver: com.amazon.redshift.jdbc41.Driver //Redshift JDBC 4 driver: com.amazon.redshift.jdbc4.Driver Class.forName("com.amazon.redshift.jdbc.Driver"); //Open a connection and define properties. System.out.println("Connecting to database..."); Properties props = new Properties(); //Uncomment the following line if using a keystore. //props.setProperty("ssl", "true"); props.setProperty("user", MasterUsername); props.setProperty("password", MasterUserPassword); conn = DriverManager.getConnection(dbURL, props); //Try a simple query. System.out.println("Listing system tables..."); stmt = conn.createStatement(); String sql; sql = "select * from information_schema.tables;"; ResultSet rs = stmt.executeQuery(sql); //Get the data from the result set. while(rs.next()){ //Retrieve two columns. String catalog = rs.getString("table_catalog"); String name = rs.getString("table_name"); //Display values. System.out.print("Catalog: " + catalog); System.out.println(", Name: " + name); } rs.close(); stmt.close(); conn.close(); }catch(Exception ex){ //For convenience, handle all errors here. ex.printStackTrace(); }finally{ //Finally block to close resources. try{ if(stmt!=null) stmt.close(); }catch(Exception ex){ }// nothing we can do try{ if(conn!=null) conn.close(); }catch(Exception ex){ ex.printStackTrace(); } } System.out.println("Finished connectivity test."); } }

Sample Details

Service: redshift

Last tested: 2015-02-19

Author: AWS

Type: full-example

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