"remove_non_alphanum_char_f" - this function is used remove non-alphanumeric character from a string
Input: varchar(255)
Output: varchar(255)
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Source Code:
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delimiter //
DROP FUNCTION IF EXISTS remove_non_alphanum_char_f //
CREATE FUNCTION remove_non_alphanum_char_f (prm_strInput varchar(255))
RETURNS VARCHAR(255)
DETERMINISTIC
BEGIN
DECLARE i INT DEFAULT 1;
DECLARE v_char VARCHAR(1);
DECLARE v_parseStr VARCHAR(255) DEFAULT ' ';
WHILE (i <= LENGTH(prm_strInput) ) DO
SET v_char = SUBSTR(prm_strInput,i,1);
IF v_char REGEXP '^[A-Za-z0-9 ]+$' THEN #alphanumeric
SET v_parseStr = CONCAT(v_parseStr,v_char);
END IF;
SET i = i + 1;
END WHILE;
RETURN trim(v_parseStr);
END
//
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Usage Example:
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select remove_non_alphanum_char_f('Sakib &^*))( scored a brilliant ---=== %% century') ;
Sakib scored a brilliant century
1 row in set (0.00 sec)
