如何解决MySQL到DB2的技术转型过程中的数据一致性问题？

// 从MySQL数据库读取数据
String mysqlDateTime = "2022-01-01 12:00:00";
LocalDateTime localDateTime = LocalDateTime.parse(mysqlDateTime, DateTimeFORMatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
Timestamp timestamp = Timestamp.valueOf(localDateTime);

// 将数据插入到DB2数据库
PreparedStatement pstmt = conn.prepareStatement("INSERT INTO table_name (timestamp_column) VALUES (?)");
pstmt.setTimestamp(1, timestamp);
pstmt.executeUpdate();

// MySQL事务开始
conn.setAutoCommit(false);
Savepoint savepoint = conn.setSavepoint();

try {
  // 事务逻辑处理代码
  // ...
  
  // DB2事务开始
  conn2.setAutoCommit(false);

  try {
    // 事务逻辑处理代码
    // ...

    // DB2事务提交
    conn2.commit();
  } catch (SQLException ex) {
    // DB2事务回滚
    conn2.rollback();
    throw ex;
  }
  
  // MySQL事务提交
  conn.commit();
} catch (SQLException ex) {
  // MySQL事务回滚到指定的保存点
  conn.rollback(savepoint);
  throw ex;
} finally {
  // 恢复MySQL的自动提交模式
  conn.setAutoCommit(true);
}

// 从MySQL数据库读取数据
PreparedStatement pstmt1 = conn1.prepareStatement("SELECT * FROM table_name");
ResultSet rs1 = pstmt1.executeQuery();

// 从DB2数据库读取数据
PreparedStatement pstmt2 = conn2.prepareStatement("SELECT * FROM table_name");
ResultSet rs2 = pstmt2.executeQuery();

// 比较数据
while (rs1.next() && rs2.next()) {
  // 比较每一行的数据是否相同
  // ...
}