Mysql : Get diagnonstic condition returns null - mysql

Question

I have written following mysql stored procedure.
CREATE DEFINER=`clocery`#`%` PROCEDURE `ADMIN_ADD_NEW_USER`(IN `IN_FIRST_NAME` varchar(50),IN `IN_LAST_NAME` varchar(50),IN `IN_USER_NAME` varchar(50), IN `IN_EMAIL` varchar(50),IN `IN_PASSWORD` varchar(80),IN `IN_ROLE` varchar(20),IN `IN_CREATED_BY` INT,OUT `OUT_STATUS` char(1),OUT `OUT_MESSAGE` varchar(200))
BEGIN
DECLARE logged_in_user_role_id INT;
DECLARE to_be_created_user_role_id INT;
DECLARE user_who_created_logged_in_user INT;
DECLARE matching_row_count_user_name INT;
DECLARE matching_row_count_user_e_mail INT;
DECLARE EXIT HANDLER FOR SQLEXCEPTION
BEGIN
ROLLBACK;
GET DIAGNOSTICS CONDITION 1 #sqlstate = RETURNED_SQLSTATE, #errno = MYSQL_ERRNO, #text = MESSAGE_TEXT;
CALL UTIL_LOG_ERROR( 'ADMIN_ADD_NEW_USER', #sqlState, #errno, #text);
SELECT 'N', UTIL_GET_ERROR_MESSAGE( 'some-error' )
INTO OUT_STATUS, OUT_MESSAGE;
END;
/**
* If passed user_id is NULL.
*/
IF IN_CREATED_BY = NULL THEN
SELECT 'N', UTIL_GET_ERROR_MESSAGE( 'some-error' )
INTO OUT_STATUS, OUT_MESSAGE;
CALL LOG_ERROR( 'ADD_NEW_USER', UTIL_GET_ERROR_MESSAGE( 'in-created-by-null' ));
ELSE
SELECT U.ROLE_ID, U.CREATED_BY INTO logged_in_user_role_id, user_who_created_logged_in_user FROM USERS U WHERE U.ID = IN_CREATED_BY;
SELECT R.ID INTO to_be_created_user_role_id FROM ROLES R WHERE R.ROLE = IN_ROLE;
/**
* If user has provided invalid role.
*/
IF to_be_created_user_role_id = NULL THEN
SELECT 'N', UTIL_GET_ERROR_MESSAGE( 'in-valid-role-provided' ) INTO OUT_STATUS, OUT_MESSAGE;
ELSE
/**
* Lets' see if logged in user has more authority than the one we are trying to create.
*/
IF to_be_created_user_role_id <= logged_in_user_role_id THEN
SELECT 'N', UTIL_GET_ERROR_MESSAGE( 'permission-denied' ) INTO OUT_STATUS, OUT_MESSAGE;
CALL CREATE_NOTIFICATION_FOR_USER( user_who_created_logged_in_user, CONCAT( GET_USER_IDENTIFICATION( IN_CREATED_BY), 'tried to create an account of higher authority.'));
ELSE
/**
* Lets' check if user name already present in the database.
*/
SELECT COUNT(*) INTO matching_row_count_user_name FROM USERS U WHERE U.USER_NAME = IN_USER_NAME;
SELECT COUNT(*) INTO matching_row_count_user_e_mail FROM USERS U WHERE U.EMAIL = IN_EMAIL;
IF matching_row_count_user_name > 0 THEN
SELECT 'N', UTIL_GET_ERROR_MESSAGE('username-exists') INTO OUT_STATUS, OUT_MESSAGE;
ELSEIF matching_row_count_user_e_mail > 0 THEN
SELECT 'N', UTIL_GET_ERROR_MESSAGE( 'email-exists' ) INTO OUT_STATUS, OUT_MESSAGE;
ELSE
/**
* Now, we are good to insert.
*/
START TRANSACTION;
/**
* Inserting into credentials first.
*/
INSERT INTO CREDENTIALS( PASSWORD, LOCKED ) VALUES ( IN_PASSWORD, 'N' );
INSERT INTO USERS( F_NAME, L_NAME, USER_NAME, EMAIL, ROLE_ID, ACTIVE, DELETED, CREATED_BY, CREATED_DATE, CREDENTIAL_ID, LAST_ACTOR_ID )
VALUES( IN_FIRST_NAME, IN_LAST_NAME, IN_USER_NAME, IN_EMAIL, to_be_created_user_role_id, 'Y', 'N', IN_CREATED_BY, NOW(), LAST_INSERT_ID(), IN_CREATED_BY );
INSERT INTO HISTORY_USER_EVENTS( USER_ID, TEXT, TYPE ) VALUES( LAST_INSERT_ID(),
CONCAT( UTIL_GET_USER_IDENTIFICATION( LAST_INSERT_ID() ), '''s account was created by ', UTIL_GET_USER_IDENTIFICATION( IN_CREATED_BY ), '.'),
UTIL_GET_EVENT_ID_FOR_ACCOUNT_ACTION( 'Created' ));
INSERT INTO HISTORY_ADMIN_EVENTS( ADMIN_ID, TEXT, TYPE ) VALUES( IN_CREATED_BY,
CONCAT( UTIL_GET_USER_IDENTIFICATION( IN_CREATED_BY ), ' created account of ', UTIL_GET_USER_IDENTIFICATION( LAST_INSERT_ID()), ' with role ', IN_ROLE, '.' ),
UTIL_GET_EVENT_ID_FOR_USER_ADDITION( IN_ROLE ));
SELECT 'Y', 'User created.' INTO OUT_STATUS, OUT_MESSAGE;
COMMIT;
END IF;
END IF;
END IF;
END IF;
END
As you can see, I have created a handler that executes in case of any SQL exception. The procedure should produce a lot of run time errors. However,
I am not able to retrieve any of the RETURNED_SQL_STATE or MYSQL_ERROR_CODE OR MESSAGE_TEXT ? They all get value null.
Is it because I am calling rollback initially ? And it somehow messes up all the relevant information ?

Answer 1

Here is the example of rollback code block with ability to log the error to some other table without loosing the exception details in MySQL and throwing the error again after logging it. You should get diagnostics BEFORE the ROLLBACK.
# CREATE PROCEDURE AND OTHER DECLARE STATEMENTS HERE
# ....
DECLARE EXIT HANDLER FOR SQLEXCEPTION
BEGIN
GET DIAGNOSTICS CONDITION 1 #sqlstate = RETURNED_SQLSTATE, #errno = MYSQL_ERRNO, #text = MESSAGE_TEXT;
ROLLBACK;
SET #full_error = CONCAT('ERR:', #errno, '(', #sqlstate, '):', #text);
CALL sp_logaction(#full_error); # Some logging procedure
RESIGNAL;
END;
# PROCEDURE BODY WITH START TRANSACTION & COMMIT HERE
# .....

Answer 2

Seems you miss to add DELIMITER in your script.
DELIMITER |
you code .. .. ..
DELIMITER;
Thanks