Error in creating procedure in MySQL - mysql

Question

What may be the possibilities of getting an error in the following query?
DELIMITER $$
CREATE PROCEDURE `tbl_assessment_notes`(
`var_reason` VARCHAR,
'var_attr2' VARCHAR,
'var_note' VARCHAR
)
BEGIN
IF EXISTS
(
SELECT
*
FROM
tbl_assessment_notes
WHERE
reason = var_reason AND attr2 = var_attr2
) THEN
UPDATE
tbl_assessment_notes
SET
note = CONCAT(note, var_note),
TIMESTAMP = 'CURRENT_TIMESTAMP'
WHERE
attr1 = var_attr1 AND reason = var_reason ELSE
INSERT
INTO
tbl_assessment_notes(
pk_assess_note_id,
attr2,
attr3,
reason,
note,
TIMESTAMP
)
VALUES(
NULL,
var_attr2,
NULL,
'confirmation',
var_note,
'CURRENT_TIMESTAMP'
) ;
END IF ;
END $$
DELIMITER ;
I'm getting the following error:
#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '
'var_reason' VARCHAR,
'var_attr2' VARCHAR,
`var_note` VARCHAR,
'var' at line 2
Basically what I'm trying to do is to update a row if it exists or else creates a new row and insert values into it.

Answer 1

Please use updated query
DELIMITER $$
CREATE PROCEDURE `tbl_assessment_notes`
(var_reason VARCHAR(255),
var_attr2 VARCHAR(255),
var_note VARCHAR(255))
BEGIN
IF EXISTS
(
SELECT
*
FROM
tbl_assessment_notes
WHERE
reason = var_reason AND attr2 = var_attr2 ) THEN UPDATE tbl_assessment_notes SET note = CONCAT(note, var_note), TIMESTAMP
= 'CURRENT_TIMESTAMP' WHERE attr1 = var_attr1 AND reason = var_reason ELSE INSERT INTO tbl_assessment_notes(
pk_assess_note_id,
attr2,
attr3,
reason,
note,
TIMESTAMP) VALUES(NULL,var_attr2,NULL,'confirmation', var_note, 'CURRENT_TIMESTAMP' ) ;
END IF ;
END $$
DELIMITER ;