Initial Checkin

DB/PostgreSqlExample.java

@@ -0,0 +1,42 @@
+/*
+Compile:
+javac PostgreSqlExample.java
+
+Run:
+java -cp postgresql-42.5.4.jar;. PostgreSqlExample
+
+*/
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+ 
+public class PostgreSqlExample {
+    public static void main(String[] args) {
+        try (Connection connection = DriverManager.getConnection("jdbc:postgresql://192.168.10.138:5432/example", "postgres", "postgres")) {
+            System.out.println("Java JDBC PostgreSQL Example");
+ 
+            System.out.println("Connected to PostgreSQL database!");
+            Statement statement = connection.createStatement();
+
+            // For huge resultset the following two lines do the trick:
+            statement.setFetchSize(100);
+            connection.setAutoCommit(false);
+            System.out.println("Reading records.");
+
+            //ResultSet resultSet = statement.executeQuery("SELECT * FROM test1 a, test1 b, test1 c, test1 d, test1 e, test1 f, test1 g, test1 h, test1 i, test1 j limit (10)");
+            // Produce HUGE resultest
+            ResultSet resultSet = statement.executeQuery("SELECT * FROM test1 a, test1 b, test1 c, test1 d, test1 e, test1 f, test1 g, test1 h, test1 i, test1 j");
+            while (resultSet.next()) {
+                System.out.print(resultSet.getInt(1));
+                System.out.println("-"+ resultSet.getString(2));
+            }
+ 
+        }  catch (SQLException e) {
+            System.out.println("Connection failure.");
+            e.printStackTrace();
+        }
+    }
+}