mysql> delimiter &&
mysql> create procedure get()
-> begin
-> select * from a;
-> end&&
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 'get()
begin
select * from a;
end' at line 1
mysql> show tables;
+----------------+
| Tables_in_data |
+----------------+
| a |
| test |
+----------------+
This is because GET is a reserved word in MySql, and therefore cannot be used as an object name without using backticks.
The following will work:
delimiter &&
create procedure `get`()
begin
select * from a;
end&&
delimiter ;
Alternatively, use another name for the procedure (which would be my recommendation as using reserved words as object names is unwise).
Related
The Mariadb Knowledge base explains that the assignment operator (:=) works with both user-defined variables and local variables.
But when I make some tests, for example :
delimiter //
CREATE or replace PROCEDURE tst_PS_now()
BEGIN
declare varnow datetime(3);
set varnow = (select now());
select 'result: ' ,varnow;
END;
//
delimiter ;
mysql:root> call tst_PS_now() ;
+----------+-------------------------+
| result: | varnow |
+----------+-------------------------+
| result: | 2020-10-26 16:13:44.000 |
+----------+-------------------------+
example 2:
delimiter //
CREATE or replace PROCEDURE tst_PS_now()
BEGIN
declare varnow datetime(3);
select varnow:=now();
select 'result: ' ,varnow;
END;
//
delimiter ;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ':=now(); at line 4
In the second example, the assignment should work with my local variable.
I really need this kind of assignment in my stored procedures.
How may I fix it ? Any idea?
mysql> show tables;
+---------------------+
| Tables_in_cpsc408db |
+---------------------+
| Product |
| laptop |
| pc |
| printer |
+---------------------+
4 rows in set (0.00 sec)
mysql> create procedure hello()
-> begin
-> select * from product;
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 '' at line 3
mysql>
I am not sure what is causing this syntax error, and haven't had any success so far figuring it out. Any help would be much appreciated.
You need to use the DELIMITER keyword:
This is so MySQL can tell which statements are within the procedure and where the end of the procedure declaration itself is
delimiter //
CREATE PROCEDURE hello()
BEGIN
select * from product;
END//
delimiter ;
You need a delimiter otherwise the console does not know when you are finished:
DELIMITER //
CREATE PROCEDURE hello()
BEGIN
SELECT * FROM product;
END //
DELIMITER ;
Read more about it here: Getting Started with MySQL Stored Procedures
I want to use hexadecimal literals in the code of a MySQL function that does operations with bit masks on BIGINTs.
According to the MySQL 5.6 manual, I can use hexadecimal literals for integer values.
This works from an SQL statement in MySQL 5.6:
mysql> SELECT CAST(0x0055aa55aa55aaff AS UNSIGNED);
+--------------------------------------+
| CAST(0x0055aa55aa55aaff AS UNSIGNED) |
+--------------------------------------+
| 24112657927088895 |
+--------------------------------------+
1 row in set (0.01 sec)
I'm now trying to use the same syntax from a stored function, on the same MySQL:
DROP FUNCTION IF EXISTS _test_hex_literal;
DELIMITER $$
CREATE FUNCTION _test_hex_literal()
RETURN BIGINT UNSIGNED
DETERMINISTIC
NO SQL
BEGIN
RETURN CAST(0x0055aa55aa55aaff AS UNSIGNED);
END;
$$
DELIMITER ;
SELECT _test_hex_literal();
DROP FUNCTION IF EXISTS _test_hex_literal;
But MySQL 5.6 is rejecting my code:
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 'RETURN BIGINT UNSIGNED
DETERMINISTIC
NO SQL
BEGIN
RETURN CAST(0x0055' at line 2
Am I doing something wrong, or is it a bug in MySQL?
If this is a MySQL bug, is there a workaround to use hexadecimal constants in the source code of my function?
Simple typo: I wrote RETURN instead of RETURNS in the function signature.
Here is the fixed code:
DROP FUNCTION IF EXISTS _test_hex_literal;
DELIMITER $$
CREATE FUNCTION _test_hex_literal()
RETURNS BIGINT UNSIGNED
DETERMINISTIC
NO SQL
BEGIN
RETURN CAST(0x0055aa55aa55aaff AS UNSIGNED);
END;
$$
DELIMITER ;
SELECT _test_hex_literal();
DROP FUNCTION IF EXISTS _test_hex_literal;
The error complaints about RETURN, not hexadecimal literals:
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 'RETURN BIGINT UNSIGNED
DETERMINISTIC
NO SQL BEGIN
RETURN CAST(0x0055'
Here's the syntax:
CREATE
[DEFINER = { user | CURRENT_USER }]
FUNCTION sp_name ([func_parameter[,...]])
RETURNS type
^
[characteristic ...] routine_body
I have create a table as below:
mysql> create table testa (a int, b int, c real);
Query OK, 0 rows affected (0.14 sec)
But when I want to implement a trigger like this, I face some syntax errors:
mysql> create trigger testa_trig
before insert ON testa
FOR EACH ROW
WHEN (NEW.c > 100)
BEGIN
Print "Warning: c > 100!"
END;
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 'WHEN (NEW.c > 100)
BEGIN
Print "Warning: c > 100!"
END' at line 4
I have checked the documentation at http://dev.mysql.com/doc/refman/5.0/en/trigger-syntax.html but can't figure out the problem!
My MySQL version:
Server version: 5.5.38-0ubuntu0.12.04.1 (Ubuntu)
Based on the comments below, I tried the following cases, but also crashed:
mysql> create trigger testa_trig before insert on testa for each row
if (NEW.c > 100) begin insert into testb set bc=NEW.c end;
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 'begin insert into testb set bc=NEW.c end' at line 1
Couple of things wrong here.
Delimiters. When you make a MySQL procedure or trigger, you need to be very explicit about delimiters so the query interpreter can distinguish between ends of lines in your procedure and the end of your declaration.
Location of the BEGIN statement. It should be directly after FOR EACH ROW.
Use of WHEN instead of IF.
Use of PRINT instead to SIGNAL SQLSTATE '...' SET MESSAGE_TEXT = '...'. This is how you raise exceptions in MySQL 5.5+.
Here is code that should work!
DELIMITER $$
CREATE TRIGGER testa_trig
BEFORE INSERT ON testa
FOR EACH ROW BEGIN
IF (NEW.c > 100) THEN
SIGNAL SQLSTATE '02000' SET MESSAGE_TEXT = 'Warning: c > 100!';
END IF;
END$$
DELIMITER ;
Also, you can display any message using the select command.
IF (NEW.c > 100) THEN
SELECT "Warning: c > 100!" AS Output;
END IF
Place above code inside the trigger. It will print the output
I'm just trying to create my first mysql stored procedure and I'm trying to copy some examples almost directly from the documentation, but it isn't working:
mysql> delimiter //
mysql> CREATE PROCEDURE ghost.test (OUT param1 INT) INSERT into admins SELECT COUNT(*) FROM bans; END//
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 '; END' at line 1
What is the deal here? This is almost identical to:
mysql> delimiter //
mysql> CREATE PROCEDURE simpleproc (OUT param1 INT)
-> BEGIN
-> SELECT COUNT(*) INTO param1 FROM t;
-> END//
Query OK, 0 rows affected (0.00 sec)
From
http://dev.mysql.com/doc/refman/5.1/en/create-procedure.html
Looks like you're missed the BEGIN.