I have a stored procedure in MYSQL where I am passing one parameter which is passed into an SQL statement as you can see below however the result is returning a count of 0 where I am expecting a count of 2.
Stored Procedure:
CREATE DEFINER=`admin`#`%` PROCEDURE `EmployeesRecords`(IN employee_id varchar (1000))
BEGIN
--
declare v_count int ;
--
select count(*)
into v_count
from employees
where employees_id IN (employee_id);
--
END
One or many employee Id's can be passed into the parameter employee_id.
when Calling Stored Procedure like this : CALL EmployeesRecords('2,3'); This returns a count of 0 where I am expecting a count of 2
As for the parameter itself, I have tried various methods including changing it in the procedure to have it as "IN ('2','3') in the SQL condition however it still does not work.
However what I have noticed is that when passing one employee Id, it works successfully such as CALL EmployeesRecords('2');
Can anyone guide me to what I am doing wrong please?
Related
I am creating a very simple store procedure with a query, but when i use the store procedure IN parameter in the query it gets stuck and does not execute the query, but if i put the value direct to the query it works.
This works:
CREATE PROCEDURE `cap-reports`.ffap_test()
BEGIN
select * FROM students WHERE name='Fernando';
END
This does not, i spent 10 minutes and it never returned
CREATE PROCEDURE `cap-reports`.ffap_test(IN pName VARCHAR(10))
BEGIN
select * FROM students WHERE name=pName;
END
call `cap-reports`.ffap_test('Fernando');
What mistake i am doing here? I never had this problem before
This procedure works for me. Maybe it's the difference in database of the procedure and the students table? Or a missing semi-colon?
CREATE PROCEDURE `cap-reports`.ffap_test(IN pName VARCHAR(10))
BEGIN
select * FROM `cap-reports`.members m WHERE m.Username = pName;
END
;
CALL `cap-reports`.ffap_test('winkbrace');
Is it possible to use a procedure inside a function? For example, I would like to gather all my rows related to an id but I would also like to count the rows and use it in a select statement. This is not working:
drop procedure if exists relatives;
create procedure relatives(in parent int(11),out counted int(11))
begin
set counted=(select count(*) from category where related=parent);
end;
drop function if exists relatives_count;
create function relatives_count(parent parent(11)) returns int(11)
begin
declare count int(11);
call relatives(parent,counted);
return counted;
end;
So that I can use the count
select relatives_count(id) from category
This is just for curiosity purposes. It may look senseless since I can just call a single select query and get the same results but I want to know how I can use my procedure out variable in a function.
Yes, a MySQL FUNCTION can call a MySQL PROCEDURE.
But... the operations the procedure performs will be limited to the operations allowed by a function. (We can't use a procedure to workaround the limitations placed on a function.)
"is not working" is so nebulously vague as to be practically useless in debugging the issue. What exact behavior is being observed?
My suspicion is that the SQL statements shown are failing, because there is no override for the default statement delimiter.
Also, parent(11) is not a valid datatype.
Be aware that when an identifier for a column in a SQL statement in a MySQL stored program matches an identifier used for an argument or local variable, MySQL follows a rule about which (the column name or the variable) that is being referenced.
Best practice is to adopt a naming convention for arguments and local variables that do not match column names, and to qualify all column references with a table name or table alias.
Personally, I use a prefix for arguments and local variables (a for argument, l for local, followed by a datatype i for integer, d for date/datetime, n for decimal, ...
DELIMITER $$
DROP PROCEDURE IF EXISTS relatives$$
CREATE PROCEDURE relatives(IN ai_parent INT(11),OUT ai_counted INT(11))
BEGIN
SELECT COUNT(*)
INTO ai_counted
FROM category c
WHERE c.related = ai_parent
;
END$$
DROP FUNCTION IF EXISTS relatives_count$$
CREATE FUNCTION relatives_count(ai_parent INT(11))
RETURNS INT(11)
BEGIN
DECLARE li_counted INT(11);
CALL relatives(ai_parent,li_counted);
RETURN li_counted;
END$$
DELIMITER ;
Please identify the exact behavior you observe. Error message when creating the procedure? Error message when executing the function? Unexpected behavior. That's much more precise and informative than telling us something "is not working".
I have created one procedure which take 2 parameter and it check the count.
But when I pass "" blank value It still return 1 count.
Did not get it why it is working like this.
Thanks for the help below is my procedure
DELIMITER $$
CREATE DEFINER=`dadclient`#`123.63.249.169` PROCEDURE `checkInOut`(IN grid varchar(50),OUT count INT)
begin
select count(GRIDID) into count from GRIDID where GRIDID=grid;
select count;
END
when I call
checkInOut("",#aaa);
select #aaa;
When I call this,it return me 1 which is wrong.
But when I pass "" blank value It still return 1 count.
Because when you say it is blank by providing an empty string it is a value. Empty string is also treated as a value in database and hence you get count as 1
The MySQL docs says:
COUNT(expr)
Returns a count of the number of non-NULL values of expr in the rows
retrieved by a SELECT statement. The result is a BIGINT value.
So if you want the count to return 0 then instead of making the string as empty "" you need to make the value as NULL.
Yo mate, try this:
DELIMITER $$
CREATE
DEFINER=`dadclient`#`123.63.249.169`
PROCEDURE `checkInOut`(
IN `grid` VARCHAR(50),
OUT `count` INT
)
BEGIN
-- insert value into variable
SET `count` = (
select count(GRIDID)
from GRIDID
where GRIDID=grid;
);
END$$
DELIMITER ;
So in your application, e.g. php you can CALL checkInOut($input, $output);. No need for the final SELECT... part in your initial code, afaik, because you already declared count as an OUT in the procedure parameter
Note:
Is the name GRIDID the name of your table? because as I see, you also used it in your WHERE statement as a key filter
Regarding your query, supposedly it is expected to contain one row of result. Kindly check that also mate
I am a MySQL rookie and have been trying to create a stored procedure. The code below returns the error Error Code: 1172. Result consisted of more than one row. What am I doing wrong? (I'm using MySQL workbench)
CREATE DEFINER=`root`#`localhost` PROCEDURE `season_private_league_user`(
IN user_id INT,
OUT league_name VARCHAR(25),
OUT host_user VARCHAR(30))
BEGIN
DECLARE userteamid INT;
DECLARE var_league_name VARCHAR(25);
DECLARE var_host_user VARCHAR(30);
# Retrieve user team from user_id
SELECT CS_USER_TEAMS_ID INTO userteamid
FROM classicseasonmodel_classicseasonuserteam
WHERE user_id = user_id;
#LEAGUE NAME
SELECT classicseasonmodel_classicseasonprivateleague.private_league_name INTO var_league_name
FROM classicseasonmodel_classicseasonuserteamprivateleague
INNER JOIN classicseasonmodel_classicseasonprivateleague
ON classicseasonmodel_classicseasonuserteamprivateleague.private_league_id=classicseasonmodel_classicseasonprivateleague.CS_PRIVATE_LEAGUE_ID
WHERE user_team_id = userteamid;
#HOST_USER
SELECT classicseasonmodel_classicseasonprivateleague.host_user_id INTO var_host_user
FROM classicseasonmodel_classicseasonuserteamprivateleague
INNER JOIN classicseasonmodel_classicseasonprivateleague
ON classicseasonmodel_classicseasonuserteamprivateleague.private_league_id=classicseasonmodel_classicseasonprivateleague.CS_PRIVATE_LEAGUE_ID
WHERE user_team_id = userteamid;
SET league_name = var_league_name;
SET host_user = var_host_user;
END
CALL season_private_league_user(2, #league_name, #host_user);
SELECT #league_name AS league_name;
SELECT #host_user AS host_user;
Your column name and parameter name are identical. Rename your input parameter and change the command to this:
SELECT CS_USER_TEAMS_ID INTO userteamid
FROM classicseasonmodel_classicseasonuserteam
WHERE user_id = #user_id;
One of the SELECTs of you stored procedure that store the result in a variable returns more than one row, which returns in this error. This way you can only store single values in a variable, not multiple ones.
You can read about the SELECT...INTO statement here. The part that might be most interesting for you is:
The selected values are assigned to the variables. The number of
variables must match the number of columns. The query should return a
single row. If the query returns no rows, a warning with error code
1329 occurs (No data), and the variable values remain unchanged. If
the query returns multiple rows, error 1172 occurs (Result consisted
of more than one row). If it is possible that the statement may
retrieve multiple rows, you can use LIMIT 1 to limit the result set to
a single row.
I noticed that a select statement inside my stored procedure is always returning the same value, no matter what parameter I'm calling my stored procedure with. Here's the code:
DELIMITER $$
CREATE PROCEDURE TEST(IN id INT)
BEGIN
DECLARE x INT DEFAULT 0;
select id;
SELECT paper_id
INTO x
FROM Paper
WHERE ID = id
limit 1;
select x;
END$$
x always returns the same value no matter what id I call test with. I noticed the value of x is always the value of paper_id in the first row of my Paper table.
However, if I run the same query outside of the stored procedure, I get the expected value.
What is going wrong inside the stored procedure which skews that value?
I'm not that familiar with MySQL's stored procedures, but could it be that the expression WHERE ID = id is evaluated as "all rows from Paper where the value in the column ID equals the value in the column ID" and simply ignores your parameter?
Try to rename your parameter to something that is different from the column name in your query.