data-access-benchmark/src/main/java/com/benchmark/util/DbUtil.java

package com.benchmark.util;

import com.benchmark.model.User;

import java.sql.*;

public class DbUtil {

    public static void createSchema(Connection conn) throws SQLException {
        try (Statement stmt = conn.createStatement()) {
            stmt.execute("""
                CREATE TABLE IF NOT EXISTS users (
                    id         INTEGER PRIMARY KEY,
                    name       TEXT    NOT NULL,
                    email      TEXT    NOT NULL,
                    age        INTEGER NOT NULL,
                    created_at INTEGER NOT NULL
                )
            """);
        }
    }

    public static User mapRow(ResultSet rs) throws SQLException {
        return new User(
            rs.getLong("id"),
            rs.getString("name"),
            rs.getString("email"),
            rs.getInt("age"),
            rs.getLong("created_at")
        );
    }
}