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Saturday, 22 October 2011 01:48 |
// To make it work with strings long than 128 characters, change its input and return declarations accordingly.
DROP FUNCTION IF EXISTS proper;
SET GLOBAL log_bin_trust_function_creators=TRUE;
DELIMITER |
CREATE FUNCTION proper( str VARCHAR(128) )
RETURNS VARCHAR(128)
BEGIN
DECLARE c CHAR(1);
DECLARE s VARCHAR(128);
DECLARE i INT DEFAULT 1;
DECLARE bool INT DEFAULT 1;
DECLARE punct CHAR(17) DEFAULT ' ()[]{},.-_!@;:?/';
SET s = LCASE( str );
WHILE i < LENGTH( str ) DO
BEGIN
SET c = SUBSTRING( s, i, 1 );
IF LOCATE( c, punct ) > 0 THEN
SET bool = 1;
ELSEIF bool=1 THEN
BEGIN
IF c >= 'a' AND c <= 'z' THEN
BEGIN
SET s = CONCAT(LEFT(s,i-1),UCASE(c),SUBSTRING(s,i+1));
SET bool = 0;
END;
ELSEIF c >= '0' AND c <= '9' THEN
SET bool = 0;
END IF;
END;
END IF;
SET i = i+1;
END;
END WHILE;
RETURN s;
END;
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DELIMITER ;
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Saturday, 22 October 2011 01:46 |
// Normalize table by creating a child table with the unique field and each value of the comma separated column.
DROP TABLE IF EXISTS SplitValues;
DROP PROCEDURE IF EXISTS split_string;
DROP PROCEDURE IF EXISTS normalize_table;
CREATE TABLE `SplitValues` (
`cid` varchar(40),
`value` varchar(500)
) ENGINE=MyISAM;
DELIMITER //
CREATE PROCEDURE split_string (pcd TEXT, pinput TEXT, pdmtr VARCHAR(10))
DETERMINISTIC
BEGIN
DECLARE cur_position INT DEFAULT 1;
DECLARE remainder TEXT;
DECLARE cur_string VARCHAR(1000);
DECLARE delimiter_length TINYINT UNSIGNED;
SET remainder = pinput;
SET delimiter_length = CHAR_LENGTH(pdmtr);
WHILE CHAR_LENGTH(remainder) > 0 AND cur_position > 0 DO
SET cur_position = INSTR(remainder, pdmtr);
IF cur_position = 0 THEN
SET cur_string = remainder;
ELSE
SET cur_string = LEFT(remainder, cur_position - 1);
END IF;
IF TRIM(cur_string) != '' THEN
INSERT INTO SplitValues (cid, value) VALUES (pcd, cur_string);
END IF;
SET remainder = SUBSTRING(remainder, cur_position + delimiter_length);
END WHILE;
END
//
CREATE PROCEDURE normalize_table (ptable VARCHAR(64), pkey TEXT, pvalue TEXT, pdel VARCHAR(10))
DETERMINISTIC
BEGIN
DECLARE done INT DEFAULT 0;
DECLARE vkey,vvalue TEXT;
SET @vquery = CONCAT("CREATE VIEW tmpnormview AS SELECT ", pkey,",",pvalue," FROM ",ptable);
DROP VIEW IF EXISTS tmpnormview;
PREPARE stmt FROM @vquery;
EXECUTE stmt;
BEGIN
DECLARE cur CURSOR FOR SELECT * FROM tmpnormview;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;
OPEN cur;
REPEAT
FETCH cur INTO vkey,vvalue;
IF NOT done THEN
CALL split_string(vkey,vvalue,pdel);
END IF;
UNTIL done END REPEAT;
CLOSE cur;
END;
DROP VIEW tmpnormview;
DEALLOCATE PREPARE stmt;
END
//
DELIMITER ;
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