I am trying to make a reusable mysql procedure that takes data from join tables and store that in a temporary table. I will then create different procedures to select/calculate data from the result.
Here is my SQL code so far:
DELIMITER //
CREATE PROCEDURE getModulesForCourseYear(IN cid VARCHAR(10), IN yr INT(1))
CALL getModulesInCourse(cid);
SELECT * FROM modules WHERE year = yr;//
DELIMITER ;
The getModulesInCourse procedure creates a temporary table called modules
After getModulesInCourse is called in the procedure getModulesForCourseYear, I would then like to filter this result. This is where it fails.
I guess this is happening because mysql does not know what table modules is as it does not currently exist.
How would I be able to select from a temporary table in this procedure?
I am doing it in PHPMyAdmin which gives this error:
SQL query:
CREATE PROCEDURE getModulesForCourseYear(IN cid VARCHAR(10), IN yr INT(1))
CALL getModulesInCourse(cid);
SELECT * FROM modules WHERE year = yr;
MySQL said:
#1064 - 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 'SELECT * FROM modules WHERE year = yr' at line 3
NOTE: I am doing the procedure this way as I want to select the same initial data in multiple procedures, then I will filter it down. This way, it prevents duplicate code and if I need to change it later on, I can do so once.
Related
I am using Aqua Data Studio 20.6 to create a MySQL stored procedure. The following is my procedure, I have named it sp_GetObjIDByProType:
( IN prono char(15), IN imgtype char(8), OUT objid bigint )
BEGIN
SELECT ObjectID INTO objid FROM images WHERE ProNumber = prono AND DocType = imgtype LIMIT 20;
END
When I try to create the stored procedure, I get this error message:
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 'IN imgtype char(8) )
( OUT objid bigint )
BEGIN
SELECT ObjectID INTO objid F' at line 3
However, it appears as if creating the task was actually successfully
(sp_GetObjIDByProType appears under 'Procedures'). I can view and alter this created stored procedure in another window (resulting stored procedure in 'Alter' window). Does this mean that creation of the stored procedure was actually successful, or is there something wrong with what I did?
Looks like your procedure was created. However, the LIMIT 20 in the query does not make sense. You are returning the selected ObjectID in the OUT parameter which can hold only one value. Yet you limit the query to 20 rows.
If you want to return max 20 rows, return the rows as a result set (leave out the out parameter and the INTO objid), or limit the rows to just one row.
I have a problem with a stored procedure, both in syntax and logic. I got the error below when trying it on sqlfiddle.com.
Also I'm not sure if the logic is right. Is there anyway I can check by entering the ID and the query will return a table which row that contains the ID has been deleted?
create a procedure named delete_id which deletes the row that goes by the ID
CREATE PROCEDURE DELETE_ID (ID_INPUT IN INT)
AS
BEGIN
DELETE FROM TABLE ALBUM WHERE ID=ID_INPUT;
END;
Expected result: Enter an Id and SQL will delete the row which contains the ID
Actual Result:
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 'TABLE ALBUM WHERE ID=ID_INPUT' at line 3
You need to add "DELIMITER //" at the start on the code and "//" at the end. So your code should look like
DELIMITER //
CREATE PROCEDURE `DELETE_ID`(IN `ID_INPUT` INT)
BEGIN
DELETE FROM `ALBUM` WHERE `ID` = ID_INPUT;
END //
Trying to create a transaction in phpmyadmin using the routine panel. I want to do an insert and an update:
START TRANSACTION;
INSERT INTO inventoryitems (item, quantity, userid)
VALUES(item, quantity, userid);
UPDATE users
SET cash = cash - (quantity * unitbuyprice);
COMMIT;
You can see the create/edit routine panel in the screen shot below:
Below is the error I get:
The following query has failed: "CREATE DEFINER=root#localhost PROCEDURE InsertInventoryItem(IN item VARCHAR(255), IN quantity INT, IN userid INT, IN unitbuyprice INT) NOT DETERMINISTIC NO SQL SQL SECURITY DEFINER START TRANSACTION; INSERT INTO inventoryitems (item, quantity, userid) VALUES(item, quantity, userid); UPDATE users SET cash = cash - (quantity * unitbuyprice); COMMIT;"
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 'INSERT INTO inventoryitems (item, quantity, userid) VALUES(item, quantity, user' at line 3
If I remove the Start Transaction, Commit and either the insert or update then the procedure is fine. IE just a single statement works fine but multiple statements always gives an error.
What am I missing when I want to include multiple statements in a procedure.
I have tried with and without the semi colon delimiter.
This stuff just works with MS SQL. I have created Procedures with hundreds of statements inside before.
Cheers for the Help in advance.
I suggest you add BEGIN and END.
Also note:
A local variable should not have the same name as a table column. If an SQL statement ... contains a reference to a column and a declared local variable with the same name, MySQL currently interprets the reference as the name of a variable.
Reference: https://dev.mysql.com/doc/refman/5.7/en/local-variable-scope.html
If we implement control of transaction within the context of a stored program, we should probably also handle an error condition, and issue the rollback within the stored program. (Personally, I adhere to the school of thought that believes we should handle transaction context outside of the stored procedure.)
The procedure definition would look something like this:
DELIMITER $$
CREATE DEFINER=root#localhost PROCEDURE InsertInventoryItem(
IN as_item VARCHAR(255),
IN ai_quantity INT,
IN ai_userid INT,
IN ai_unitbuyprice INT
)
BEGIN
-- handle error conditions by issuing a ROLLBACK and exiting
DECLARE EXIT HANDLER FOR SQLEXCEPTION
BEGIN
ROLLBACK;
EXIT PROCEDURE;
END;
START TRANSACTION ;
INSERT INTO inventoryitems (item, quantity, userid)
VALUES (as_item, ai_quantity, ai_userid) ;
UPDATE users u
SET u.cash = u.cash - (ai_quantity * ai_unitbuyprice)
WHERE u.userid = ai_userid ;
COMMIT ;
END$$
DELIMITER ;
--
Note that the update will assign a NULL to cash if either ai_quantity or ai_unitbuyprice is NULL. And we probably want a WHERE clause to limit the rows that will be updated. (Without the WHERE clause, the UPDATE statement will update all rows in the table.)
That's what the statements would look like if I wanted to create the procedure from a normal client, such as the mysql command line, or SQLyog.
MySQL syntax is significantly different than Transact-SQL (Microsoft SQL Server). We just have to deal with that.
As far as "this stuff just works with MS SQL", in all fairness, we should be careful to not conflate MySQL itself with the trouble prone idiot-syncracies of the phpMyAdmin client.
I have call statement like
CALL report_procedure
('2013-02-01',now(),'2015-01-01','1');
and i want to use it in a select query.
i have tried like
Select * from ( CALL report_procedure
('2013-02-01',now(),'2015-01-01','1'));
but error occurs.
like
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 ( CALL report_procedure
('2013-02-01',now(),'2015-01-01','1') at line 3 0.297 sec
Can anyone suggest me a method to call stored procedure in Select statement in mysql??
It is not possible to use result set from procedure in FROM clause. MySQL does not allow doing this.
You may populate another table (or temporary table) in your procedure, and after, use that table in SELECT commands -
CALL report_procedure ('2013-02-01',now(),'2015-01-01','1'); -- fill temp_table
SELECT * FROM temp_table;
--Firstly your store procedure should look something like this:
CREATE PROCEDURE report_procedure(
IN d1 DATE,
dnow DATE,
d2 DATE,
val INT
)
BEGIN SELECT *
FROM yourtablename
WHERE date1 = d1
AND datenow > dnow
AND date2 > d2
AND value = val;
END
--The store procedure contains the select statement.
-- then you can call the store procedure like that:
CALL report_procedure('2013-02-01',now(),'2015-01-01','1');
--hope it helps
I am trying to write a stored procedure for SQL Server 2008. It is for a migration tool that migrates data from one database to another.
I want to get all records from the old database that aren't yet present in the new database. For that end I use the stored procedure below. But I get the error
The multi-part indentifier could not
be bound
while executing the stored procedure. What can I do to make this work?
Here is the SP:
SELECT *
FROM Measurement_device
WHERE Measurement_device.Department_Code = '99'
AND mir.dbo.Gages.Gage_code != Device_Number
It's because you have the mir.dbo.Gages.Gage_code condition when that table is not referenced in the FROM clause. Try something like this:
SELECT m.*
FROM Measurement_device m
LEFT JOIN mir.dbo.Gages g ON g.Gage_code = m.Device_Number
WHERE m.Department_Code = '99'
AND g.Gage_code IS NULL -- where the gage_code/device_number does not already exist in mir database