计算引擎中使用系统自动计算参数：@time_calc

直接上代码：

 /// <summary>
        /// auto_do_for_time_calc 按照秒计算
        /// @time_calc-86400 返回则是当前时刻往前减去86400秒（也就是一天）,可用：@time_calc-200,@time_calc+500,@time_calc300
        /// select * from table  where create_time>'@time_calc-18000000' and create_time<'@time_calc-36000'   
        /// select * from table  where create_time>'2024-04-17 03:26:14' and create_time<'2024-11-11 01:26:14' 
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>

        string auto_do_sql_for_time_calc(string sql)
        {
            if (sql.contains_x("@time_calc").is_false()) return sql;

            Regex regex = new Regex("@time_calc[\\w\\W]*?(?=')");

            var matches = regex.Matches(sql);

            foreach (Match match in matches)
            {
                string key = match.Value;

                double val = key.Replace("@time_calc", "").ToDouble();

                sql = sql.Replace(key, DateTime.Now.AddSeconds(val).toStringX());
            }

            return sql;
        }

done