目前，我正在使用此功能：
DELIMITER //
CREATE FUNCTION SUM_OF_LIST(s TEXT)
RETURNS DOUBLE
DETERMINISTIC
NO SQL
BEGIN
DECLARE res DOUBLE DEFAULT 0;
WHILE INSTR(s, ",") > 0 DO
SET res = res + SUBSTRING_INDEX(s, ",", 1);
SET s = MID(s, INSTR(s, ",") + 1);
END WHILE;
RETURN res + s;
END //
DELIMITER ;
@Found here： Summing a comma separated column in MySQL 4 (not 5)
总结这样的MySQL结果：
30.48, 7.41, 5.01, 18.01, 11.07, 9.12, 45.90, 11.56, 37.62, 23.34, 2.23, 8.46, 49.20, 7.82, 7.11, 11.22, 581.79, 15.42, 22.68, 15.06, 115.20, 4.82, 69.30, 77.00, 6.90, 3.92, 43.26, 5.63, 5.40, 9.08, 6.96, 10.54, 4.35, 29.76, 32.79, 20.16, 26.22, 9.81, 11.86, 6.34, 10.28, 38.08, 35.25, 58.95, 6.32, 50.92, 31.04, 58.22, 22.23, 22.52, 18.46, 8.09, 8.30, 36.54, 14.55, 4.35, 9.92, 4.45, 32.46, 55.92, 61.02, 26.40, 4.05, 6.36, 3.38, 20.61, 19.02, 9.30, 9.76, 45.42, 11.79, 14.45, 14.88, 24.38, 12.69, 28.80, 38.10, 31.86, 16.47, 46.74, 70.80, 6.27, 8.20, 16.47, 61.80, 61.80, 7.70, 14.20, 19.83, 19.64, 19.62, 81.60, 56.52, 56.70, 28.16, 1.71, 16.58, 6.09, 11.90, 71.44, 174.45, 5.89, 9.23, 8.75, 15.12, 7.40, 21.78, 8.04, 10.86, 19.02, 8.76, 76.23, 7.06, 19.80, 65.52, 16.12, 9.99, 11.41, 10.29, 9.45, 56.64, 12.90, 24.30, 74.29, 33.62, 13.50, 9.71, 9.60, 69.30, 19.25, 28.16, 27.86, 9.16, 25.80, 30.84, 10.58, 68.04, 5.03, 19.50, 70.20, 8.60, 20.22, 126.27, 23.01, 92.40, 37.26, 19.62, 78.48, 74.46, 11.73, 88.40, 25.30, 8.13, 181.44, 31.23, 9.12, 22.23, 50.92, 3.69, 4.06, 8.75, 8.75, 13.40, 14.04, 14.52, 26.64, 79.74, 8.96, 16.20, 15.20, 26.61, 9.45, 42.60, 21.84, 565.74, 108.24, 18.80, 13.56, 5.97, 16.47, 61.45, 8.00, 28.40, 34.92, 33.75, 5.04, 24.75, 13.00, 78.00, 9.90, 14.92, 11.16, 12.16, 32.04, 9.81, 7.98, 36.84, 15.20, 7.09, 6.86, 31.32, 20.37, 6.30, 186.30, 7.09, 4.50, 4.93, 25.68, 2.25, 13.26, 29.02, 17.90, 11.10, 5.01, 7.41, 42.60, 15.42, 13.50, 33.00, 70.80, 6.38, 9.93, 7.58, 11.76, 35.84, 12.60, 17.20, 17.20, 74.29, 21.84, 3.15, 554.73, 216.00, 27.14, 12.65, 29.22, 33.66, 7.98, 7.69, 9.84, 8.10, 5.48, 21.96, 74.76, 30.30, 118.68, 3.78, 19.32, 17.40, 20.16, 10.77, 21.54, 12.13, 11.68, 16.92, 16.47, 7.01, 3.72, 20.58, 100.75, 4.46, 20.84, 14.42, 18.96, 8.50, 10.30, 11.73, 6.70, 9.12, 31.32, 94.38, 17.91, 7.70, 18.81, 16.08, 4.54, 14.82, 19.86, 47.52, 3.94, 50.92, 3.07, 9.23, 9.23, 8.75, 15.84, 2.25, 7.41, 16.08, 3936.00, 32.22, 11.82, 8.46, 33.93, 15.12, 27.37, 9.12, 16.81, 50.43, 568.26, 15.42, 446.49, 25.29, 7.50, 3.92, 7.08, 23.82, 18.66, 33.60, 9.68, 18.81, 20.46, 14.86, 4.39, 16.47, 16.93, 30.48, 6.87, 145.80, 147.75, 47.11, 4.56, 15.40, 71.15, 16.92, 30.54, 10.30, 10.92, 5.85, 9.81, 57.84, 55.68, 1507.20, 6.70, 10.30, 7.68, 24.00, 27.48, 7.58, 19.25, 20.58, 4.70, 8.06, 19.03, 9.23, 9.23, 9.30, 17.74, 11.85, 22.25, 5.42, 3.40, 53.76, 9.36, 15.33, 15.30, 53.76, 8.46, 15.60, 7.58, 83.93, 15.14, 61.52, 7.58, 6.88, 7.57, 14.36, 30.27, 229.50, 121.77, 13.53, 5.47, 32.61, 7.70, 100.62, 30.54, 30.81, 4.50, 19.96, 5.06, 36.84, 51.24, 3.33, 7.80, 14.84, 8.06, 15.36, 6.88, 17.70, 10.18, 26.08, 10.74, 13.53, 17.79, 78.48, 12.36, 22.80, 26.04, 37.62, 11.22
这个功能有效，但我希望总结大量数据，在我的测试中，我可以在~30个左右的时间内评估大约12个Mi数学运算。
但是当它在规范化的数据库中运行时，我可以在＆lt; 0.5段。
可以将像"10.02 + 1.03 + 4.01 + 5.07"这样的字符串作为数学表达式进行评估吗？
我已经尝试使用CAST eval，但eval不会返回任何内容：（