CREATE PROCEDURE PROCEDURENAME()
BEGIN
IF ((CONDITION),SELECT 0, SELECT 1)); //not working
IF condition THEN statement END IF; //not working
IF condition
statement //not working
END
How should I properly write the if statement structure? Anyone have a working example? Please help me.
Clearly read the last stored procedure structure on the below page
http://www.mysqltutorial.org/mysql-if-statement/
please use your code like this one or simply put your code and condition in below code so I will make it fix
DELIMITER //
CREATE PROCEDURE `proc_IF` (IN param1 INT)
BEGIN
DECLARE variable1 INT;
SET variable1 = param1 + 1;
IF variable1 = 0 THEN
SELECT variable1;
END IF;
IF param1 = 0 THEN
SELECT 'Parameter value = 0';
ELSE
SELECT 'Parameter value <> 0';
END IF;
END //
Related
I am inserting the records in mysql database using while loop.I want to chcek the check atleast one record is inserted or not. I tried below code but ROW_COUNT() give me success, if the record is not inserted.
DELIMITER $$
DROP PROCEDURE IF EXISTS test$$
CREATE PROCEDURE test()
BEGIN
DECLARE count INT DEFAULT 0;
DECLARE res varchar(255);
WHILE count < 10 DO
/**Sql statement**/
SET count = count + 1;
END WHILE;
IF ROW_COUNT() > 0 THEN
SET res = 'success';
ELSE
SET res = 'failure';
END IF;
SELECT res;
END$$
DELIMITER ;
I have spent quite a long time to figure out.. so my update statement is affecting 0 rows although I know for a fact that it should affect at least affect more than a few rows as I have tried as a standalone. In place of update statement I tried select statement and it is working so does that mean that update statement is not supposed to work in stored procedure.. I kinda doubt it.. so I would like to get a second opinion.
my stored procedure code here:
DELIMITER $$
CREATE PROCEDURE updateKeywordsInRIConsole(in retailerId int )
BEGIN
declare key_words varchar(200) default null;
declare grpid bigint(20);
declare finished bool default false;
declare cur1 cursor for
select Keywords, GRPID
from RIConsole
where RetailerID = retailerId
and DateCreated > date(now()) - interval 1 year
and INSTR(Keywords, "offer_page") = false;
declare continue handler for not found set finished = 1;
declare exit handler for sqlexception
begin
show errors;
end;
declare exit handler for sqlwarning
begin
show warnings;
end;
open cur1;
start_loop: loop
fetch cur1 into key_words, grpid;
if finished = 1 then
leave start_loop;
end if;
update RIConsole set Keywords = concat(key_words, " ",
"offer_page") where GRPID = cast(grpid as signed); <-- this code not working...I called it with cast function to make sure.. and i also tried without it.
end loop start_loop;
close cur1;
END $$
DELIMITER ;
DROP PROCEDURE updateKeywordsInRIConsole;
Yes, you can do an UPDATE in a stored procedure.
If you are happy with your SELECT, you could do the while thing in a single statement. e.g.
CREATE PROCEDURE updateKeywordsInRIConsole(IN retailerId INT)
BEGIN
UPDATE RIConsole
SET Keywords = CONCAT(Keywords, " ", "offer_page")
WHERE where RetailerID = retailerId
AND DateCreated > DATE(NOW()) - INTERVAL 1 YEAR
AND INSTR(Keywords, "offer_page") = false;
END
;
This Stored Procedure should be returning a false if the value passed in the parameter does not exist in the table.
CREATE DEFINER=`listsjag_user`#`%` PROCEDURE `Select_ReferenceAvailability`(IN ref VARCHAR(45))
BEGIN
IF EXISTS (
SELECT * FROM tbl_dataLibrary
WHERE itemreference = #ref
) THEN
SELECT 'true';
ELSE
SELECT 'false';
END IF;
END
It is returning true for all values but there is only one value in the column itemreference.
Does anyone have any ideas?
A MySQL stored procedure cannot really return a value. You can either pass in an OUT parameter and modify it, or convert your procedure to a function.
CREATE FUNCTION ReferenceAvailability (IN ref VARCHAR(45))
RETURNS boolean
BEGIN
IF(EXISTS(SELECT * FROM tbl_dataLibrary WHERE itemreference = #ref)) THEN
RETURN 1;
END IF;
RETURN 0;
END;
I changed your true/false to 1/0, feel free to change back, but you will need to return varchar(5).
Use the function in a select like this:
SELECT ReferenceAvailability(...)
Hope that helps.
For the following MySql script Flyway produces a MySQL syntax error while running the script directly in something like Navicat works fine. Can anyone tell me why that is?
CREATE PROCEDURE RegressionTest_Genealogy (OUT Success TINYINT)
BEGIN
DECLARE MetricVerification TINYINT;
SET Success = 0;
SELECT COUNT(MERTRICID) INTO MetricVerification FROM metrics_temp WHERE lft = 0 OR rgt = 0;
IF MetricVerification = 0 THEN
SET Success = 1;
END IF;
END
You probably need to issue a delimiter change first to make this work, as per default the delimiter is ; which is contained in your procedure body.
Try this
DELIMITER //
CREATE PROCEDURE RegressionTest_Genealogy (OUT Success TINYINT)
BEGIN
DECLARE MetricVerification TINYINT;
SET Success = 0;
SELECT COUNT(MERTRICID) INTO MetricVerification FROM metrics_temp WHERE lft = 0 OR rgt = 0;
IF MetricVerification = 0 THEN
SET Success = 1;
END IF;
END //
DELIMITER ;
I created this test procedure :
DELIMITER //
CREATE PROCEDURE `str` (IN var1 INT)
BEGIN
WHILE var1 < 5 DO
SELECT var1;
SET var1 = var1 + 1;
END WHILE;
END //
DELIMITER ;
when I run it via phpmyadmin, nothing happens. no error, no confirm message. If I CALL str(1), I get a message saying the procedure doesn't exist. What's wrong here?
If you want to get the iterated value of var1 you need the SELECT outside of the WHILE loop. The following works fine in my MySQL install:
DROP PROCEDURE IF EXISTS `str`;
DELIMITER //
CREATE PROCEDURE `str` (IN var1 INT)
BEGIN
WHILE var1 < 5 DO
SET var1 = var1 + 1;
END WHILE;
SELECT var1;
END //
DELIMITER ;
Executing CALL str(1) returns 5