Why won't my SQL passwordhashing-procedure run? - mysql

Question

I am trying to create a SQL procedure that hashes password inputs. This code won't run and I am not getting any useful response errors.
The first part creates the table, the second creates the procedure. When I call on my procedure in the third part it send the values into the procedure. There the password is supposed to be hashed using SHA2_512 and inserted into the table we made eralier.
I used online research to make this code, the parts I don't get is:
The N before my values
The SetNoCount
The #responsemessage
-- makes Admin table
CREATE TABLE IF NOT EXISTS `AdminUser` (
`AdminID` smallint(6) NOT NULL AUTO_INCREMENT,
`Username` char(15) NOT NULL,
`PasswordHash` BINARY(64) NOT NULL,
`Fornavn` char(30) NOT NULL,
`Etternavn` char(40) NOT NULL,
`Email` char(40) NOT NULL,
PRIMARY KEY (`AdminID`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
-- Makes hashing procedure
CREATE OR REPLACE PROCEDURE vm_ski.addAdmin
#pUsername NVARCHAR(50),
#pPassword NVARCHAR(50),
#pFornavn NVARCHAR(30),
#pEtternavn NVARCHAR(40),
#pEmail NVARCHAR(40),
#responseMessage NVARCHAR(250)='' OUTPUT
AS
BEGIN
SET NOCOUNT ON
BEGIN TRY
INSERT INTO vm_ski.AdminUser (Username, PasswordHash, Fornavn, Etternavn, Email)
VALUES(#pUsername, HASHBYTES('SHA2_512', #pPassword), #pFornavn, #pEtternavn, #pEmail)
SET #responseMessage='Success'
END TRY
BEGIN CATCH
SET #responseMessage=ERROR_MESSAGE()
END CATCH
END;
-- Admin example
DECLARE #responseMessage NVARCHAR(250)
EXECUTE vm_ski.addAdmin
#pUsername = N'sondre',
#pPassword = N'example'
#pFornavn = N'Sondre'
#pEtternavn = N'Morgendal'
#pEmail = N'sondre.example#gmail.com'
;

Answer 1

This is not a direct answer to the question; this is a security note on the methodology of the question
Do NOT hash passwords in MySQL. The data given to MySQL is plaintext, and easily intercepted by MySQL processing logs as well as possibly numerous other places before being dumped in the database (such as if message packets sent to the database are non-localhost and are non-TLS). ( Why? )
When hashing passwords you want to be doing so as early in the process as possible. This typically means using PHP password_hash and simply dumping only the hashed data in the MySQL.
If you do not use PHP to interact with your SQL then you can use other server methods such as Argon2 or Libsodium.
Also as a side point you should be using the mb4 UTF-8 charset and collations - principly utf8mb4_general_ci ( Why? )