import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.time.Duration;
import java.time.Instant;
import java.util.Properties;

public class OracleUpdate {

    public static void main(String[] args) throws Exception {
        Class.forName("oracle.jdbc.OracleDriver");

        String url = "jdbc:oracle:thin:@192.168.99.100:1521:ORCLCDB";
        String user = "TEST";
        String password = "TEST";

        Properties properties = new Properties();
        properties.setProperty("user", user);
        properties.setProperty("password", password);

        try (Connection c = DriverManager.getConnection(url, properties)) {
            for (int i = 0; i < 5; i++) {
                Instant ts;

                resetPost(c);
                ts = Instant.now();

                try (Statement s = c.createStatement();
                    ResultSet rs = s.executeQuery(
                        "SELECT id FROM post WHERE archived = 0 AND creation_date < DATE '2018-01-01'"
                    )) {

                    while (rs.next()) {
                        try (PreparedStatement u = c.prepareStatement(
                            "UPDATE post SET archived = 1 WHERE id = ?"
                        )) {
                            u.setInt(1, rs.getInt(1));
                            u.executeUpdate();
                        }
                    }
                }

                System.out.println("Run " + i + ", Statement 1: " + Duration.between(ts, Instant.now()));

                resetPost(c);
                ts = Instant.now();

                try (Statement s = c.createStatement();
                    ResultSet rs = s.executeQuery(
                        "SELECT id FROM post WHERE archived = 0 AND creation_date < DATE '2018-01-01'"
                    );
                    PreparedStatement u = c.prepareStatement(
                        "UPDATE post SET archived = 1 WHERE id = ?"
                    )) {

                    while (rs.next()) {
                        u.setInt(1, rs.getInt(1));
                        u.executeUpdate();
                    }
                }

                System.out.println("Run " + i + ", Statement 2: " + Duration.between(ts, Instant.now()));

                resetPost(c);
                ts = Instant.now();

                try (Statement s = c.createStatement();
                    ResultSet rs = s.executeQuery(
                        "SELECT id FROM post WHERE archived = 0 AND creation_date < DATE '2018-01-01'"
                    );
                    PreparedStatement u = c.prepareStatement(
                        "UPDATE post SET archived = 1 WHERE id = ?"
                    )) {

                    while (rs.next()) {
                        u.setInt(1, rs.getInt(1));
                        u.addBatch();
                    }

                    u.executeBatch();
                }
                System.out.println("Run " + i + ", Statement 3: " + Duration.between(ts, Instant.now()));

                resetPost(c);
                ts = Instant.now();

                try (Statement s = c.createStatement()) {
                    s.executeUpdate("UPDATE post\n" +
                        "SET archived = 1\n" +
                        "WHERE archived = 0 AND creation_date < DATE '2018-01-01'\n");
                }

                System.out.println("Run " + i + ", Statement 4: " + Duration.between(ts, Instant.now()));
            }
        }
    }

    static void resetPost(Connection c) throws SQLException {
        try (Statement s = c.createStatement()) {
            s.executeUpdate("TRUNCATE TABLE post");
            s.executeUpdate("INSERT INTO post\n" +
                "    SELECT \n" +
                "      level,\n" +
                "      lpad('a', 1000, 'a'),\n" +
                "      0,\n" +
                "      DATE '2017-01-01' + (level / 10)\n" +
                "    FROM dual\n" +
                "    CONNECT BY level <= 10000");
            s.executeUpdate("BEGIN dbms_stats.gather_table_stats('TEST', 'POST'); END;");
        }
    }
}