Question

i Have a problem returning multiple rows in one output

there are multiple user_roleID’s returned. The procedure is below:

CREATE PROCEDURE Sample(OUT userName VARCHAR(30))
BEGIN
SELECT user_roleID INTO userName FROM users;
END

i would like to get a list of data when i print the output value (userName)

call Sample1(@emp);
select @emp;

but when i excecute this command i get the following error reported:

1172 – Result consisted of more than one row

Can somebody tell me how to fix this problem?

kind regards

Answer 1

If you are looking to create a stored function to return an ID based on a username, for example, then the following would work

CREATE FUNCTION Sample(inUserName VARCHAR(255)) RETURNS INT(11)
BEGIN
    DECLARE returnValue INT;
    SELECT user_roleID INTO returnValue FROM users WHERE userName = inUserName LIMIT 1;
    RETURN returnValue;
END

This would be called using SELECT Sample('SomeUserName') AS userID;