I'm following some tutorials on mysql function creation but I keep getting the following error.
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:
CREATE FUNCTION getstatisticscount (h VARCHAR(35),d date)
RETURNS INT
DETERMINISTIC
BEGIN
DECLARE tel INT;
SELECT count(hash) into tel from statsitieken where hash=h and lastvisit between concat(d,' 00:00:00') and concat(d,' 23:59:59') group by hash;
RETURN tel;
END;
I can for my life not find where line 5 is, but no matter which line I put it on, I keep getting this error.
If I remove this function from the sql fiddle code it's all fine.
I can't find what's wrong with it... except maybe flawed tutorials.
http://sqlfiddle.com/#!2/70f0a
Use Delimiter
delimiter //
CREATE FUNCTION getstatistics(h VARCHAR(35),d date)
RETURNS INT
DETERMINISTIC
BEGIN
DECLARE tel INT;
SELECT count(hash) INTO tel
FROM statistics
WHERE
hash=h
AND lastvisit BETWEEN concat(d,' 00:00:00') AND concat(d,' 23:59:59')
GROUP BY hash;
RETURN tel;
END
//
DELIMITER ;
For more info: http://dev.mysql.com/doc/refman/5.1/en/stored-programs-defining.html
Edit: basically since your stored procedure separates out statements with semicolons (;) and the method that defines your procedure ALSO uses semicolons to separate out statements, it's hard to impossible for MySQL to figure out where your procedure begins and ends.
I also edited the SQL statement above to return the delimiter back to the default semicolon.
Related
I am following sql in 10 minutes to learn "stored procedure"
#+BEGIN_SRC sql :engine mysql :dbuser org :database grocer
CREATE PROCEDURE MailingListCount (
ListCount OUT INTEGER )
IS
v_rows INTEGER;
BEGIN
SELECT COUNT(*) INTO v_rows
FROM Customers
WHERE NOT cust_email IS NULL;
ListCount := v_rows;
END;
#+END_SRC
#+RESULTS:
| |
it report error:
ERROR 1064 (42000) at line 1: 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 'OUT INTEGER )
IS
v_rows INTEGER' at line 2
Could you please provide any hints?
Couple of fixes:
The OUT comes before the parameter name
Remove the unnecessary IS
Declare the variables inside the BEGIN END block
Use SET when you assign variables
So:
CREATE PROCEDURE MailingListCount(OUT ListCount INTEGER )
BEGIN
declare v_rows INTEGER;
SELECT COUNT(*) INTO v_rows
FROM Customers
WHERE NOT cust_email IS NULL;
SET ListCount := v_rows;
END;
Usually it's easier to handle the procedure output from result set rather than OUT variables. The OUT variables are useful primarily on calls between procedures.
So if you plan to call the routine from application, use:
CREATE PROCEDURE MailingListCount()
BEGIN
SELECT COUNT(*) as 'Count'
FROM Customers
WHERE NOT cust_email IS NULL;
END;
First thing is the position of the OUT keyword. It should be before the Parameter name.
Then second one no need to create the variable v_rows to store the output and then finally assigning it back to the OUT parameter listCount.
If you want to check condition like email should not null then you should do something like WHERE cust_email IS NOT NULL instead of WHERE NOT cust_email IS NULL
Please refer below code for the reference :
DELIMITER $$
CREATE PROCEDURE `MailingListCount` (OUT listCount INTEGER)
BEGIN
SELECT COUNT(*) INTO listCount
FROM Customers
WHERE cust_email IS NOT NULL;
END$$
DELIMITER ;
You can use the different delimiter for the MySql stored procedures and functions.
MySql use ; as default delimiter so delimiters other than the default ; are typically used when defining functions, stored procedures, and triggers wherein you must define multiple statements. You define a different delimiter like $$ which is used to define the end of the entire procedure, but inside it, individual statements are each terminated by ;. That way, when the code is run in the mysql client, the client can tell where the entire procedure ends and execute it as a unit rather than executing the individual statements inside.
You can refer the https://dev.mysql.com/doc/refman/8.0/en/create-procedure.html to learn MySQL Stored procedure.
Here is a simple function I am creating for purpose of practice. But receive the given error.
DELIMITER $$
CREATE FUNCTION Weighted_Average(n1 INT, n2 INT, n3 INT, n4 INT)
RETURNS INT
DETERMINISTIC
BEGIN
DECLARE avg INT;
SET avg = (n1 + n2 + n3*2 + n4*4)/8;
RETURN avg;
END;
DELIMITER $$
Error Code: 1064. You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'n4*4)/8; RETURN avg; END' at line 6
I am comparing it to this post:
MySQL CREATE FUNCTION Syntax
Someone with experience can probably point out my mistake while I am getting no where. I don't see what is wrong where the error is asking me to look. Note: I am using workbench.
Are you sure you don't mean the following, mainly the bottom of it?
DROP FUNCTION IF EXISTS Weighted_Average;
DELIMITER $$
CREATE FUNCTION Weighted_Average(n1 INT, n2 INT, n3 INT, n4 INT)
RETURNS INT
DETERMINISTIC
BEGIN
DECLARE avg INT;
SET avg = (n1 + n2 + n3*2 + n4*4)/8;
RETURN avg;
END;$$
DELIMITER ;
A DELIMITER is necessary for some client-side environments to delineate the beginning and end of blocks, and to change the end-of-lines for statements.
As the DELIMITER is defaulted to ; out of the box, we know how to end a sql line with it, and never think about it. Until ...
When it comes to specialty blocks like CREATE PROCEDURE , FUNCTION, EVENT, TRIGGER, there needs to be some protocol for the client and server to know where the whole thing ends.
So, for clients like MySQL Workbench and similar, we use DELIMITER blocks. We change it to something funny up top, code as usual, and do the ending as seen above. Setting the DELIMITER back to our normal ;
They are not needed for PHPMyAdmin. And presumably not so for SqlFiddle
I'm trying to create a function like this in MYSQL:
DELIMITER $$
CREATE FUNCTION `submit`(title VARCHAR(45)) RETURNS INT
BEGIN
DECLARE articleId INT;
INSERT INTO Articles (`Title`) VALUES (title);
SET #articleId = LAST_INSERT_ID();
RETURN (articleId);
END
$$ DELIMITER ;
No matter how I change it (including removing everything in the body and placing a "return 1;" instead) I get:
You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use
near 'DELIMITER $$ CREATE FUNCTION submit(title v' at line 1
What am I missing?
I'm using MySQL 5.5
EDIT
Apparently, MySQL is ignoring the first statement (DELIMITER $$), failing on the first ; it finds, right after articleId INT in the 4th line. I had to reduce the code to the shortest form possible to make sure that's the case.
So I guess my question now is - Why is the DELIMITER keyword ignored?
I'm trying to set up a MySQL function for my Mail-server. The MySQL Version is 5.1.66.
I do know what is wrong with this query. I also tried with RETURN DOUBLE, READS SQL DATA, and DETERMINISTIC but none of them help.
I am using PhpMyAdmin. The delimiter is set to $$. But all I get is a cryptic error message:
#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 'TEXT CHARSET utf8 READS SQL DATA BEGIN DECLARE mygoto VARCHAR(25' at line 3
My code:
CREATE PROCEDURE `get_email_alias`(
myemail VARCHAR(255)
) RETURNS TEXT CHARSET utf8
READS SQL DATA
BEGIN
DECLARE mygoto VARCHAR(255);
DECLARE sdomain VARCHAR(255);
DECLARE ddomain VARCHAR(255);
SELECT SUBSTRING(myemail, INSTR(myemail, '#')+1) INTO sdomain;
SELECT target_domain
FROM alias_domain
WHERE alias_domain = sdomain
AND active = 1
LIMIT 1
INTO ddomain;
IF ddomain IS NOT NULL THEN
SELECT REPLACE(myemail, sdomain, ddomain) INTO myemail;
END IF;
SELECT goto
FROM alias
WHERE address = myemail
AND active = 1
LIMIT 1
INTO mygoto;
IF mygoto IS NOT NULL THEN
RETURN mygoto;
END IF;
RETURN null;
END $$
For anyone that comes across this later:
There was originally a syntax error in the keyword PROCEDURE. It was missing the final E.
According to the MySQL syntax, CREATE PROCEDURE does not RETURN. However, CREATE FUNCTION does allow the RETURN in the syntax. Reference: http://dev.mysql.com/doc/refman/5.1/en/create-procedure.html.
PROCEDURE" on first line is missing "E"
I'm trying to benchmark a stored procedure.
select benchmark(100000000,(select 1));
this benchmark works
but the following benchmark doesn't:
do benchmark(1000,(call test_login_user('a')));
it produces the following error:
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'call xpofb_login_user('a')))' at line 1
any ideas how to resolve the issue ?
You can't do this with benchmark(), but you could create a stored procedure to do it.
Here's an example:
delimiter $$
create procedure benchmark_test_login_user (p_username varchar(100),
p_count int unsigned)
begin
declare v_iter int unsigned;
set v_iter = 0;
while v_iter < p_count
do
call test_login_user(p_username);
set v_iter = v_iter + 1;
end while;
end $$
delimiter ;
call benchmark_test_login_user('a',1000);
You can't
http://dev.mysql.com/doc/refman/5.0/en/information-functions.html#function_benchmark
Only scalar expressions can be used. Although the expression can be a subquery, it must return a single column and at most a single row. For example, BENCHMARK(10, (SELECT * FROM t)) will fail if the table t has more than one column or more than one row.