syntax error in mysql procedure error code 1064 - mysql

Question

I am trying to write one procedure, i am getting syntax error. I was trying to fix the same with the help of net, but failed.
Here is my stored procedure. Any help please?
The scenario is i am trying to take workspaceid column values from table hotelings and trying to make that value as my column for another table. Then i am trying to update the same column value with ; for a given start and end time of hoteling table in newly created table2.
My two tables are
CREATE TABLE `hotelings` (
`HotelingId` int(11) NOT NULL AUTO_INCREMENT,
`Description` longtext,
`StartDate` datetime NOT NULL,
`EndDate` datetime NOT NULL,
`BookedBy` longtext,
`BookingType` int(11) NOT NULL,
`RepeatType` longtext,
`RepeatDay` longtext,
`ProjectId` int(11) NOT NULL,
`WorkSpaceId` int(11) NOT NULL,
`starttime` varchar(45) DEFAULT NULL,
`endtime` varchar(45) DEFAULT NULL,
PRIMARY KEY (`HotelingId`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;
CREATE TABLE `hotelingtime` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`Time` time DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;
and my procedure is:
DELIMITER $$
CREATE DEFINER=`root`#`localhost` PROCEDURE `new_procedure`()
BEGIN
SET #sql = NULL;
SELECT
GROUP_CONCAT(DISTINCT
CONCAT(
'MAX(CASE WHEN workspaceid = ''',
workspaceid,
''' then "" ELSE NULL end) AS ',
CONCAT('`',workspaceid,'`')
)
) INTO #sql
FROM sms.hotelings;
SET #sql = CONCAT('CREATE TABLE IF NOT EXISTS table2 AS SELECT t.Time as Time, ', #sql, ' FROM sms.hotelings h, sms.hotelingtime t
GROUP BY t.Time');
PREPARE stmt FROM #sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
begin
declare num_rows int;
declare i int;
declare col_name varchar(50);
declare v varchar(10);
DECLARE v_finished INTEGER DEFAULT 0;
-- cursor to fetch column names
DECLARE col_names CURSOR FOR
SELECT column_name
FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_name = 'table2'
ORDER BY ordinal_position;
-- declare NOT FOUND handler
DECLARE CONTINUE HANDLER
FOR NOT FOUND SET v_finished = 1;
OPEN col_names;
temp_hotelingloop: LOOP
FETCH col_names INTO col_name;
IF v_finished = 1 THEN
LEAVE temp_hotelingloop;
END IF;
begin
declare starttime time;
declare endtime time;
-- cursor to fetch start and end for a given workspaceid
DECLARE startendTime CURSOR FOR
SELECT starttime, endtime from hotelings
where workspaceid = col_name;
OPEN startendTime;
FETCH startendTime INTO starttime, endtime;
-- i am getting error here and not giving me the result.
SET #sql = CONCAT('update table2 set ''',#col_name ,''' = '';'' where time between ''',#starttime,''' and ''',#endtime,'''');
PREPARE stmt FROM #sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
CLOSE startendTime;
end;
SET i = i + 1;
END LOOP temp_hotelingloop;
CLOSE col_names;
end;
select * from table2;
DROP TABLE table2;
END
Any help please?
Thanks in advance

Answer 1

SET #sql = CONCAT('update table2 set ''',#col_name ,''' = '';'' where time between ''',#starttime,''' and ''',#endtime,'''');
You are using #col_name here, but on your declaration missing the #
declare col_name varchar(50);