I can't see what is wrong with this syntax please help! I tried to look up the syntax from here
http://dev.mysql.com/doc/refman/5.5/en/declare-handler.html
DELIMITER $$
DROP PROCEDURE IF EXISTS `load_dimensions`$$
CREATE PROCEDURE `load_dimensions`( )
BEGIN
-- Declare variables to hold diagnostics area information
DECLARE code CHAR(5) DEFAULT '00000';
DECLARE msg TEXT;
DECLARE rows INT;
DECLARE result varchar(300);
-- Declare exception handler for failed insert
DECLARE CONTINUE HANDLER FOR SQLEXCEPTION
BEGIN
GET DIAGNOSTICS CONDITION 1 code = RETURNED_SQLSTATE, msg = MESSAGE_TEXT;
END;
INSERT dimtable(col)
SELECT col FROM extract;
IF code = '00000' THEN
GET DIAGNOSTICS rows = ROW_COUNT;
SET result = CONCAT('succeeded, row count = ',rows);
INSERT INTO etl_log (result)
SELECT CONCAT('Error',state,': ',msg);
ELSE
SET result = CONCAT('failed, error = ',code,', message = ',msg);
INSERT INTO etl_log (result)
SELECT CONCAT('Error',state,': ',msg);
END IF;
END $$
From the MySQL 5.5 reference pages
The GET DIAGNOSTICS statement is not supported until MySQL 5.6.
Related
I try to update some columns using trigger before insert
DROP TRIGGER IF EXISTS update_p_posts_places;
DELIMITER $$
CREATE TRIGGER update_p_posts_places BEFORE
INSERT
ON
`p_posts` FOR EACH ROW
BEGIN
DECLARE
p_post_group_id_ int;
SELECT
`p_post_subgroup`.`p_post_group_id`
INTO
p_post_group_id_
FROM
`p_post_subgroup`
WHERE
`p_post_subgroup`.`p_post_subgroup_id` = NEW.p_post_subgroup_id;
IF(p_post_group_id_ = 5) THEN
BEGIN
DECLARE
place1_id_ int;
place2_id_ int;
place3_id_ int;
place4_id_ int;
place5_id_ int;
SELECT
`Places`.`place1_id`,
`Places`.`place2_id`,
`Places`.`place3_id`,
`Places`.`place4_id`,
`Places`.`place5_id`
INTO
place1_id_, place2_id_, place3_id_, place4_id_, place5_id_
FROM
`Places`
WHERE
`Places`.`place5_id` = NEW.p_post_place_id LIMIT 1;
SET NEW.place5_id = place5_id_;
SET NEW.place1_id = place1_id_;
SET NEW.place2_id = place2_id_;
SET NEW.place3_id = place3_id_;
SET NEW.place4_id = place4_id_;
END $$
ELSE
SET NEW.place5_id = NULL;
END IF;
END $$
DELIMITER ;
It's showing some syntax errors.
#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 'DECLARE
place1_id_ int;
place2_id_ int;
' at line 20
Here is a working trigger. I tested creating it on MySQL 5.7.
CREATE TRIGGER update_p_posts_places BEFORE INSERT ON `p_posts`
FOR EACH ROW
BEGIN
-- all declarations must be before any other statements
DECLARE p_post_group_id_, place1_id_, place2_id_, place3_id_,
place4_id_, place5_id_ int;
SELECT
`p_post_subgroup`.`p_post_group_id`
INTO
p_post_group_id_
FROM
`p_post_subgroup`
WHERE
`p_post_subgroup`.`p_post_subgroup_id` = NEW.p_post_subgroup_id;
IF(p_post_group_id_ = 5) THEN
SELECT
`Places`.`place1_id`,
`Places`.`place2_id`,
`Places`.`place3_id`,
`Places`.`place4_id`,
`Places`.`place5_id`
INTO
place1_id_, place2_id_, place3_id_, place4_id_, place5_id_
FROM
`Places`
WHERE
`Places`.`place5_id` = NEW.p_post_place_id LIMIT 1;
SET NEW.place5_id = place5_id_;
SET NEW.place1_id = place1_id_;
SET NEW.place2_id = place2_id_;
SET NEW.place3_id = place3_id_;
SET NEW.place4_id = place4_id_;
ELSE
SET NEW.place5_id = NULL;
END IF;
END $$
You can use one DECLARE for multiple local variables, but you must do like var1, var2, var3, ... int. In other words, name the type only once at the end. See documentation: https://dev.mysql.com/doc/refman/8.0/en/declare-local-variable.html
No need for the BEGIN..END inside the IF and definitely do not use $$ until after the last END because that will terminate the parser's interpretation of your whole CREATE TRIGGER statement before it's complete.
So I have this stored procedure:
delimiter //
create procedure sp_finish_campaign(in c_title varchar(30))
begin
update campaign set CAMPAIGNFINISHDATE = CURDATE()
where TITLE = c_title;
end//
delimiter ;
I want to know how to throw an error handler with a message if the c_title parameter doesn't exist in the campaign table. I have tried using
DECLARE EXIT HANDLER FOR SQLSTATE '42000'
SELECT 'Error!';
and some if statements but either the syntax is wrong or it comes up with an error 1054 unknown column title in fieldlist.
use this code:
create procedure sp_finish_campaign(in c_title varchar(30))
begin
update campaign set CAMPAIGNFINISHDATE = CURDATE()
where TITLE = c_title;
if ##rowcount=0
begin
DECLARE #ErrorMessage NVARCHAR(4000);
DECLARE #V_ErrorCode INT;
DECLARE #ErrorState INT;
SELECT #V_ErrorCode = 50000 ,
#ErrorMessage = c_title+ ' is not exists' ,
#ErrorState = 1
THROW #V_ErrorCode,#ErrorMessage,#ErrorState
end
end//
I checked the post here and the MySQL manual and I get part of the answer.
Question:
I have some query that can cause errors,, I want to handle them and have a message for the first error happened + line number + rollback (if there is an error).
The part of answer that I have:
Return the code and error message.
Rollback all of the queries if there is an error.
The part of answer that I don't have
The first error (the code return the last error).
Line number.
I know there is some errors in the code because I got each part from one site and mixed them LOL
The codes:
DELIMITER $$
CREATE PROCEDURE prod()
BEGIN
DECLARE is_rolback BOOL DEFAULT 0;
DECLARE resultError TEXT;
DECLARE errorCode CHAR(5) DEFAULT '00000';
DECLARE errorMsg TEXT;
DECLARE ErrorRows INT;
DECLARE CONTINUE HANDLER FOR SQLEXCEPTION
BEGIN
GET DIAGNOSTICS CONDITION 1
errorCode = RETURNED_SQLSTATE, errorMsg = MESSAGE_TEXT;
SET is_rolback = 1;
END;
START TRANSACTION;
SET autocommit = 0;
-- The codes for checking the errors possible
-- Start
insert into table1 values (2, 'B'); -- Correct
insert into table1 values (1, 'A'); -- Error id 1 is already in database;
insert into table1 values ('C'); -- Error should pass also the ID
-- End
IF is_rolback THEN
ROLLBACK;
GET DIAGNOSTICS ErrorRows = ROW_COUNT;
SET resultError = CONCAT('Failed, error = ',errorCode,', line = ', ErrorRows, ', message = ',errorMsg);
select resultError;
select * from table1;
ELSE
COMMIT;
END IF;
END$$
DELIMITER ;
CALL prod();
DROP PROCEDURE IF EXISTS prod;
The output:
Failed, error = 21S01, line = 0, message = Column count doesn't match value count at row 1
id name
1 A
I wrote a MYSQL Procedure for my user registration page, I have already written the PHP part to send data from there to MySQL, and it works fine (tried with a dummy data and retrieval). But there is some sort of problem with my handler or transaction I guess
This is my Procedure:
BEGIN
DECLARE unamec INT;
DECLARE emailc INT;
DECLARE m INT;
DECLARE msg VARCHAR(100);
DECLARE EXIT HANDLER FOR SQLEXCEPTION SET m=1;
START TRANSACTION;
SET autocommit=0;
SELECT COUNT(*) INTO unamec FROM login WHERE uname=`#user`;
IF unamec=0 THEN
SELECT COUNT(*) INTO emailc FROM login WHERE email=#email;
IF emailc=0 THEN
INSERT INTO login (uname, hash, email, role) values(#user,MD5(#password),#email,'1');
SET msg='Successfully Registered';
ELSE
SET msg='Email Already Exists';
END IF;
ELSE
SET msg='Username Already Exists';
END IF;
COMMIT;
END;
END;
IF m=1 THEN
ROLLBACK;
SET msg='ERROR';
END IF;
SELECT msg as message;
END
I always get the error
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
'END;
IF m=1 THEN
ROLLBACK;
SET msg='ERROR';
END IF;
SELECT msg as message;' at line 23
Is there something obvious I am missing? I have been trying for some time to solve this with almost all the results to show the same error.
Any help will be highly appreciated.
Ok, I edited my own code and got the required result.
The changes I made was:
BEGIN
DECLARE unamec INT;
DECLARE emailc INT;
DECLARE m INT;
DECLARE msg VARCHAR(100);
DECLARE EXIT HANDLER FOR SQLEXCEPTION
START TRANSACTION;
SET autocommit=0;
SELECT COUNT(*) INTO unamec FROM login WHERE uname=`#user`;
IF unamec=0 THEN
SELECT COUNT(*) INTO emailc FROM login WHERE email=#email;
IF emailc=0 THEN
INSERT INTO login (uname, hash, email, role) values(#user,MD5(#password),#email,'1');
SET msg='Successfully Registered';
ELSE
SET msg='Email Already Exists';
END IF;
ELSE
SET msg='Username Already Exists';
END IF;
COMMIT;
BEGIN
ROLLBACK;
SET msg='ERROR';
END;
SELECT msg as message;
END
If anyone get any other answer, still appreciate it.
Anyways, the above code is now working fine.
I want to know How return empty resultset always from MySQL stored procedure, if there is any type error is raise on Procedure during data fetching.
Thanks
Inside your procedure, can use the ERROR HANDLER
CREATE PROCEDURE `procedure_namme`(OUT return_data TEXT)
BEGIN
DECLARE v_error_code CHAR(5);
DECLARE v_error_msg TEXT;
DECLARE EXIT HANDLER FOR SQLEXCEPTION
BEGIN
GET DIAGNOSTICS CONDITION 1
v_error_code = RETURNED_SQLSTATE,
v_error_msg = message_text;
SET return_data = NULL; -- IF ERROR OCCUR THEN ITS SET NULL
SELECT v_error_code,v_error_msg;
END
-- BODY WHAT YOU WANT TO WRITE(LOGIC)
END;
To know more about it you can refer this one
http://www.mysqltutorial.org/mysql-error-handling-in-stored-procedures/