30 lines
550 B
MySQL
30 lines
550 B
MySQL
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DELIMITER $$
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CREATE OR REPLACE DEFINER=`root`@`localhost` FUNCTION `vn`.`validationCode`(vString VARCHAR(255))
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RETURNS int(11)
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DETERMINISTIC
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BEGIN
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DECLARE vSeed DOUBLE DEFAULT 0;
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DECLARE vCode INT;
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DECLARE vLength INT;
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DECLARE vChar INT;
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SET vLength = length(vString);
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WHILE vLength > 0 DO
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SET vChar = MID(vString,vLength,1);
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SET vSeed = vSeed + ASCII(vChar);
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SET vLength = vLength - 1;
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END WHILE;
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SET vCode = FLOOR(SQRT(vSeed)*1000000) mod 1000;
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RETURN vCode;
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END$$
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DELIMITER ;
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