import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class OceanBaseReFetchExample {

    public static void main(String[] args) {
        try {
            // 加载 JDBC 驱动
            Class.forName("oracle.jdbc.driver.OracleDriver");

            // OceanBase 数据库连接 URL
            String url = "jdbc:oracle:thin:@localhost:1521:your_oceanbase_sid";

            // 用户名和密码
            String user = "your_username";
            String password = "your_password";

            // 获取连接
            try (Connection connection = DriverManager.getConnection(url, user, password)) {
                // 执行查询的 SQL 语句
                String sql = "SELECT * FROM your_table_name WHERE your_condition";

                // 预编译 SQL 语句
                try (PreparedStatement statement = connection.prepareStatement(sql)) {
                    // 执行查询并获取结果集
                    try (ResultSet resultSet = statement.executeQuery()) {
                        // 处理结果集
                        while (resultSet.next()) {
                            // 获取每行数据的列值
                            int column1Value = resultSet.getInt("column1");
                            String column2Value = resultSet.getString("column2");
                            // ... 根据需要获取其他列的值

                            // 在这里可以对每一行的数据进行处理
                            System.out.println("Original Data - Column1: " + column1Value + ", Column2: " + column2Value);

                            // 在这里模拟重新检索行的过程（重新执行查询）
                            reFetchRow(connection, column1Value);
                        }
                    }
                }
            }
        } catch (ClassNotFoundException | SQLException e) {
            e.printStackTrace();
        }
    }

    private static void reFetchRow(Connection connection, int primaryKeyValue) throws SQLException {
        // 重新检索行的 SQL 语句
        String reFetchSql = "SELECT * FROM your_table_name WHERE primary_key_column = ?";

        // 预编译 SQL 语句
        try (PreparedStatement reFetchStatement = connection.prepareStatement(reFetchSql)) {
            // 设置参数
            reFetchStatement.setInt(1, primaryKeyValue);

            // 执行重新检索并获取结果集
            try (ResultSet reFetchResultSet = reFetchStatement.executeQuery()) {
                // 处理重新检索的结果集
                if (reFetchResultSet.next()) {
                    int reFetchColumn1Value = reFetchResultSet.getInt("column1");
                    String reFetchColumn2Value = reFetchResultSet.getString("column2");
                    // ... 根据需要获取其他列的值

                    // 在这里可以对重新检索的行的数据进行处理
                    System.out.println("Re-Fetched Data - Column1: " + reFetchColumn1Value + ", Column2: " + reFetchColumn2Value);
                }
            }
        }
    }
}