I need to declare the variable in MySQL. and here is what I have till now.
CREATE TRIGGER upd
BEFORE UPDATE ON chats FOR EACH ROW
BEGIN
DECLARE my_cursor CURSOR FOR SELECT name FROM messages;
END
logically, it seams OK. but there is a strange error
i.e
SQL query:
CREATE TRIGGER upd
BEFORE UPDATE ON chats FOR EACH ROW
BEGIN
DECLARE my_cursor CURSOR FOR SELECT name FROM messages;
MySQL said:
#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 '' at line 4
This works. Will gladly delete it when it gets dupe closed.
It merely lacks a delimiter wrapping block.
drop trigger if exists upd;
delimiter $$
CREATE TRIGGER upd
BEFORE UPDATE ON chats FOR EACH ROW
BEGIN
DECLARE vapenid INT;
END;
$$
delimiter ;
I am just trying to use trigger instead of check constraint and code one but it gives me an error.
CREATE TRIGGER conflict
ON roozane
FOR EACH ROW
BEGIN
if rDate = NEW.rDate then
if NEW.rStartTime < rStartTime AND NEW.rEndTime < rEndTime then
INSERT INTO roozane (rID,rDate,rStartTime,rEndTime,rPlace,rComment,rType) values (NEW.rID,NEW.rDate,NEW.rStartTime,NEW.rEndTime,NEW.rPlace,NEW.rComment,NEW.rType);
end if
end if
END;$$
And error
#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ON roozane FOR EACH ROW BEGIN if ( rDate=NEW.rDate ) then if ( NEW.rStart' at line 2
EDIT
CREATE TRIGGER conflict BEFORE INSERT
ON roozane
FOR EACH ROW
BEGIN
if rDate = NEW.rDate then
if NEW.rStartTime < rStartTime AND NEW.rEndTime < rEndTime then
INSERT INTO roozane (rID,rDate,rStartTime,rEndTime,rPlace,rComment,rType) values (NEW.rID,NEW.rDate,NEW.rStartTime,NEW.rEndTime,NEW.rPlace,NEW.rComment,NEW.rType);
end if
end if
END;$$
and the 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 '' at line 7
tnx for help
You need a *trigger_time* and *trigger_event*. For example:
CREATE TRIGGER conflict AFTER INSERT
You need a semicolon after each end if to terminate those compound statements.
You don't need a semicolon after the last END, because presumably you have used DELIMITER $$ to change the statement terminator in the mysql client.
I tested the following. It did not get a syntax error, but of course I have no table called roozane so I got a different error. :-)
CREATE TRIGGER conflict BEFORE INSERT
ON roozane
FOR EACH ROW
BEGIN
if rDate = NEW.rDate then
if NEW.rStartTime < rStartTime AND NEW.rEndTime < rEndTime then
INSERT INTO roozane (rID,rDate,rStartTime,rEndTime,rPlace,rComment,rType) values (NEW.rID,NEW.rDate,NEW.rStartTime,NEW.rEndTime,NEW.rPlace,NEW.rComment,NEW.rType);
end if;
end if;
END$$
You have several problems with your trigger.
As far as syntactical and logic errors go
Looking at the error message apparently you didn't use DELIMITER $$ at the beggining of your script.
You have three undeclared variables in your trigger rDate, rStartTime, rEndTime. If you use stored procedure level variables you need to declare them first and eventually assign values to them.
As #BillKarwin mentioned in his answer you have to have semicolons at the end of each IF ... END IF; statement and you don't need semicolon after closing END of a BEGIN...END block of your trigger since you should've changed DELIMITER earlier to $$.
That being said syntactically correct version of your trigger might be following
DELIMITER $$
CREATE TRIGGER conflict
BEFORE INSERT ON roozane
FOR EACH ROW
BEGIN
DECLARE rDate DATE;
DECLARE rStartTime TIME;
DECLARE rEndTime TIME;
IF rDate = NEW.rDate THEN
IF NEW.rStartTime < rStartTime AND NEW.rEndTime < rEndTime THEN
INSERT INTO roozane (rID,rDate,rStartTime,rEndTime,rPlace,rComment,rType)
VALUES(NEW.rID,NEW.rDate,NEW.rStartTime,NEW.rEndTime,NEW.rPlace,NEW.rComment,NEW.rType);
END IF;
END IF;
END$$
Here is SQLFiddle demo that shows that now your trigger is being successfully created but does nothing since declared variables by default have values of NULL and other values have not been assigned to them.
Here goes the most important part: event if the problem with the variables will be fixed unfortunately your trigger won't work anyway because MySql with its rather limited support for triggers doesn't allow data manipulation statements (INSERT in your case) on the same table (roozane in your case) you are attaching your trigger to.
Now, to help you to fix your trigger you need to explain what you want your trigger to check for.
I need to create a trigger in my database.
The trigger must be able to analyse event before insert. In case of the last event already existing in the database has the same status, the trigger has to cancel the insert and update the last event.
I tried to create one but I can't add it in my database because of mysql errors:
#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 '' at line 5
Here the trigger:
CREATE TRIGGER events_before_insert
BEFORE INSERT ON monitoringV2.events
FOR EACH ROW
BEGIN
DECLARE id_last_event;
DECLARE status_last_event;
SELECT id INTO id_last_event, status INTO status_last_event FROM events WHERE module_id=NEW.module_id ORDER BY serverDate DESC LIMIT 1;
IF NEW.status = status_last_event THEN
UPDATE events SET serverDate=NOW() WHERE id=id_last_event;
signal sqlstate '00000' set message_text = "Update instead of insert";
END IF;
END;
Here are information server:
PHP 5.4.6 VC9
Apache 2.4.2 VC9
MySQL 5.5.27
PhpMyAdmin 3.5.2.2
Thanks for your help
Regards,
Dorine M.
You will need to delimit your create statement:
delimiter //
CREATE...
...
END;
//
DELIMITER ;
and you will probably need to define a type for each variable declared, e.g.
DECLARE x INT;
You have to change DELIMITER before creating a trigger like this
DELIMITER $$
CREATE TRIGGER...
...
END;
$$
DELIMITER ;
You might not need to implement a trigger for this. The operation you are describing is formally known as UPSERT, i.e. update or insert.
This is how it's done in MySQL and you could also look at REPLACE.
Here is another question covering this.
I am trying to write trigger in Mysql (5.1), but getting following error, please help.
The error is:
SQL 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 '' at line 5.
Purpose for writing trigger:
I am writing application where I am assigning users, and I want to store unassigned usercount to field cluster_count in IX_branchdetails table.After updating the base table.
trigger:
DELIMITER $$
CREATE TRIGGER upd_trg AFTER
UPDATE ON DBNAME.BASETABLE
FOR EACH ROW
BEGIN
DECLARE m_branchcode INTEGER;
DECLARE cnt INTEGER;
DECLARE cursor_branch CURSOR FOR
SELECT DISTINCT branchcode
FROM ix_branchdetails;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
open cursor_branch;
my_loop: loop
set done = false;
fetch cursor_branch into m_branchcode;
if done then
leave my_loop;
end if;
select count(1) into cnt from (select count(1) from BASETABLE Where IX_BRANCHCODE = m_branchcode) as temp;
update DBANAME.ix_branchdetails set DBANAME.ix_branchdetails.cluster_count = cnt where DBANAME.ix_branchdetails.BRANCHCODE = m_branchcode;
end loop my_loop;
close cursor_branch;
END $$
DELIMITER ;
I don't see a declare for the done variable:
DECLARE done TINYINT DEFAULT FALSE;
The semicolon (;) is the default delimiter for MySQL statements. To get a procedure/function/trigger defined, we normally see the statement delimiter changed to a string that doesn't appear in the statement:
DELIMITER $$
CREATE PROCEDURE ...
END$$
DELIMITER ;
If the delimiter is not changed from the semicolon, then when MySQL encounters the first semicolon in your procedure/function/trigger, it sees that as the end of the statement, which is not what you want. You want MySQL to see the entire block of code as a single statement.
I am new to mysql and I cant see why I have an error when I create my stored procedure.
DELIMITER |
CREATE PROCEDURE lastscan(IN task_id_var INT)
BEGIN
SELECT COUNT(*) FROM debugger WHERE task_id=task_id_var INTO #total|
SET #total=#total+1|
INSERT INTO debugger SET scan_num=#total, task_id=task_id_var|
END|
DELIMITER;
I get :
#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 '' at line 3
I also dont get, why do I need to use that delimiter syntax.. ? DELIMITER | and then again DELIMITER;...what its function
DELIMITER |
CREATE PROCEDURE lastscan(IN task_id_var INT, IN file_name_var VARCHAR(110))
BEGIN
SELECT COUNT(*) FROM debugger WHERE task_id=task_id_var INTO #total;
SET #total=#total+1;
INSERT INTO debugger SET scan_num=#total, task_id=task_id_var, file_name=file_name_var;
END|
DELIMITER;
This works for me. no need to put | delimiter in sored procedure. I think it is meant to be for the stored procedure and not for what is inside the body
You can't simply assign variables like that, you need the SET keyword first.
http://dev.mysql.com/doc/refman/5.1/en/set-statement.html
So you code should be something like this (tested with phpMyAdmin):
DELIMITER //
CREATE PROCEDURE lastscan(IN task_id_var INT)
BEGIN
SELECT COUNT(*) FROM debugger WHERE task_id=task_id_var INTO #total;
SET #total=#total+1;
INSERT INTO debugger SET scan_num=#total, task_id=task_id_var;
END;//
DELIMITER ;
The DELIMITER keyword is used to stop additional semicolons in your procedure to be the end of the current statement, so by redefining the delimiter to // MySql will process the whole CREATE PROCEDURE-block as one single statement and not stop at the first semicolon but instead wait for the first occurrence of //.
http://dev.mysql.com/doc/refman/5.1/en/stored-programs-defining.html