Error When Writing to MySQL Database

//Import the entire java.sql package
import java.sql.*;
import java.util.Date;
import java.text.DateFormat;
import java.text.SimpleDateFormat;

//Set up a connection and a drivermanager.
Class.forName("com.mysql.jdbc.Driver").newInstance();
      Connection conn;
      conn = DriverManager.getConnection("jdbc:mysql://" + session.getVariable("MYSQL_SERVER_URL") + ":"+session.getVariable("MYSQL_SERVER_PORT") + "/" +  session.getVariable("MYSQL_DATABASE"), session.getVariable("MYSQL_SERVER_USER"), session.getVariable("MYSQL_SERVER_PASSWORD"));

// Function to generate the date
String getDateTime()
{
DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd");
Date date = new Date();
return dateFormat.format(date);
}

//Set extracted variables to local variables.
//Depending on when your script is executed
// you may have variables in session scope
// and others as dataRecords.
value1 = "VALUE1";
value2 = session.getVariable("SKU_NAME").replace("'", "\\'");
value3 = dataRecord.get("SKU_PRICE");
value4 = getDateTime();
value5 = "VALUE5";

//Create statements and run queries
// on your database.
Statement stmt = null;
stmt = conn.createStatement();

      mysqlstring="INSERT IGNORE INTO tbl_prices (site_code, sku_name, sku_price, price_date, value_five) VALUES('"+value1+"','"+ value2 + "','"+value3+"','" + value4 +"','" + value5 +"')";
      stmt.executeUpdate(mysqlstring);

//Be sure to close up your
// statements and connection.
stmt.close();
conn.close();
}