How to remove Vietnamese Character in MySQL - mysql

Question

My Code MYSQL
DELIMITER //
CREATE FUNCTION fNonUnicode(p_inputVar LONGTEXT )
RETURNS LONGTEXT
BEGIN
IF (p_inputVar IS NULL OR p_inputVar = '') THEN RETURN '';
END IF;
DECLARE v_RT LONGTEXT;
DECLARE v_SIGN_CHARS NVARCHAR(256);
DECLARE v_UNSIGN_CHARS NVARCHAR (256);
SET v_SIGN_CHARS = Concat(N'ăâđêôơưàảãạáằẳẵặắầẩẫậấèẻẽẹéềểễệếìỉĩịíòỏõọóồổỗộốờởỡợớùủũụúừửữựứỳỷỹỵýĂÂĐÊÔƠƯÀẢÃẠÁẰẲẴẶẮẦẨẪẬẤÈẺẼẸÉỀỂỄỆẾÌỈĨỊÍÒỎÕỌÓỒỔỖỘỐỜỞỠỢỚÙỦŨỤÚỪỬỮỰỨỲỶỸỴÝ' , NCHAR(272) + NCHAR(208));
SET v_UNSIGN_CHARS = N'aadeoouaaaaaaaaaaaaaaaeeeeeeeeeeiiiiiooooooooooooooouuuuuuuuuuyyyyyAADEOOUAAAAAAAAAAAAAAAEEEEEEEEEEIIIIIOOOOOOOOOOOOOOOUUUUUUUUUUYYYYYDD';
DECLARE v_COUNTER int;
DECLARE v_COUNTER1 int;
SET v_COUNTER = 1;
WHILE (v_COUNTER <= CHAR_LENGTH(RTRIM(p_inputVar)))
DO
SET v_COUNTER1 = 1;
WHILE (v_COUNTER1 <= CHAR_LENGTH(RTRIM(v_SIGN_CHARS)) + 1)
DO
IF UNICODE(SUBSTRING(v_SIGN_CHARS, v_COUNTER1,1)) = UNICODE(SUBSTRING(p_inputVar,v_COUNTER ,1))
THEN
IF v_COUNTER = 1 THEN
SET p_inputVar = CONCAT(SUBSTRING(v_UNSIGN_CHARS, v_COUNTER1,1) , SUBSTRING(p_inputVar, v_COUNTER+1,CHAR_LENGTH(RTRIM(p_inputVar))-1));
ELSE
SET p_inputVar = CONCAT(SUBSTRING(p_inputVar, 1, v_COUNTER-1) ,SUBSTRING(v_UNSIGN_CHARS, v_COUNTER1,1) , SUBSTRING(p_inputVar, v_COUNTER+1,CHAR_LENGTH(RTRIM(p_inputVar))- v_COUNTER));
END IF;
BREAK
END IF;
SET v_COUNTER1 = v_COUNTER1 +1;
END WHILE;
SET v_COUNTER = v_COUNTER +1;
END WHILE;
-- SET #inputVar = replace(#inputVar,' ','-')
RETURN p_inputVar;
END;
//
DELIMITER ;
But Error:You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'DECLARE v_RT LONGTEXT;
Finnaly: I want to use:fNonUnicode("Xin chào các bạn") return Xin chao cac ban

Answer 1

MySQL Function to remove accents and special characters
DROP FUNCTION IF EXISTS fn_remove_accents;
DELIMITER |
CREATE FUNCTION fn_remove_accents( textvalue VARCHAR(10000) ) RETURNS VARCHAR(10000)
BEGIN
SET #textvalue = textvalue;
-- ACCENTS
SET #withaccents = 'ŠšŽžÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÑÒÓÔÕÖØÙÚÛÜÝŸÞàáâãäåæçèéêëìíîïñòóôõöøùúûüýÿþƒ';
SET #withoutaccents = 'SsZzAAAAAAACEEEEIIIINOOOOOOUUUUYYBaaaaaaaceeeeiiiinoooooouuuuyybf';
SET #count = LENGTH(#withaccents);
WHILE #count > 0 DO
SET #textvalue = REPLACE(#textvalue, SUBSTRING(#withaccents, #count, 1), SUBSTRING(#withoutaccents, #count, 1));
SET #count = #count - 1;
END WHILE;
-- SPECIAL CHARS
SET #special = '!##$%¨&*()_+=§¹²³£¢¬"`´{[^~}]<,>.:;?/°ºª+*|\\''';
SET #count = LENGTH(#special);
WHILE #count > 0 do
SET #textvalue = REPLACE(#textvalue, SUBSTRING(#special, #count, 1), '');
SET #count = #count - 1;
END WHILE;
RETURN #textvalue;
END
|
DELIMITER ;

Answer 2

please try with code below
DROP FUNCTION IF EXISTS fn_remove_accents;
DELIMITER //
CREATE FUNCTION fn_remove_accents(textvalue TEXT)
RETURNS TEXT
BEGIN
SET #textvalue = textvalue;
-- ACCENTS
SET #withaccents = 'ăâđêôơưàảãạáằẳẵặắầẩẫậấèẻẽẹéềểễệếìỉĩịíòỏõọóồổỗộốờởỡợớùủũụúừửữựứỳỷỹỵýĂÂĐÊÔƠƯÀẢÃẠÁẰẲẴẶẮẦẨẪẬẤÈẺẼẸÉỀỂỄỆẾÌỈĨỊÍÒỎÕỌÓỒỔỖỘỐỜỞỠỢỚÙỦŨỤÚỪỬỮỰỨỲỶỸỴÝ';
SET #withoutaccents = 'aadeoouaaaaaaaaaaaaaaaeeeeeeeeeeiiiiiooooooooooooooouuuuuuuuuuyyyyyAADEOOUAAAAAAAAAAAAAAAEEEEEEEEEEIIIIIOOOOOOOOOOOOOOOUUUUUUUUUUYYYYY';
SET #count = LENGTH(#withaccents);
WHILE #count > 0 DO
SET #textvalue = REPLACE(#textvalue, SUBSTRING(#withaccents, #count, 1), SUBSTRING(#withoutaccents, #count, 1));
SET #count = #count - 1;
END WHILE;
RETURN #textvalue;
END
//
DELIMITER ;