Question

Hi I’m using MySQL to create a function:

CREATE FUNCTION INSERTGROUP(name VARCHAR(50))
RETURNS INT
NOT DETERMINISTIC
BEGIN
DECLARE 'idGroup' INT;

IF (NOT EXISTS (SELECT groupID FROM groupsTable WHERE groupName = 'name'))
THEN INSERT INTO groupsTable (groupName) VALUES ('name');

SELECT groupID INTO 'idGroup' FROM groupsTable WHERE groupName='name';

RETURN 'idGroup';
END//

But I get this error when I try to create it:

ERROR 1064 (42000): 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
''idGroup' INT;

IF (NOT EXISTS (SELECT groupID FROM serverGroupsTable WHERE gro' at line 5

I’ve been through forums and other questions similar to this one but I can not make it create the function.

What I’m doing wrong? Is the syntax correct? Do I need to add something else?

Ok this is what I’ve try:

CREATE FUNCTION INSERTGROUP(name VARCHAR(255))
RETURNS INT
NOT DETERMINISTIC
BEGIN
DECLARE idGroup INT;

IF (NOT EXISTS (SELECT groupID FROM groupsTable WHERE groupName = name))
THEN INSERT INTO groupsTable (groupName) VALUES (name);

SELECT groupID INTO idGroup FROM groupsTable WHERE groupName=name;

RETURN idGroup;
END//

and

CREATE FUNCTION INSERTGROUP(name VARCHAR(255))
RETURNS INT
NOT DETERMINISTIC
BEGIN
DECLARE idGroup INT;

IF (NOT EXISTS (SELECT groupID FROM groupsTable WHERE groupName = 'name'))
THEN INSERT INTO groupsTable (groupName) VALUES ('name');

SELECT groupID INTO idGroup FROM groupsTable WHERE groupName='name';

RETURN idGroup;
END//

and for the last two I got this error:

ERROR 1064 (42000): 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
'' at line 13

Similar to the one above

Also I do DELIMITER // to change it from ;

Answer 1

remove the quotes from the declaration

DECLARE idGroup INT;

and you forgot the delimiter change at the start of the function

delimiter //
CREATE FUNCTION INSERTGROUP(name VARCHAR(255))

and you forgot to end your if statement

end if;

whereever you want it to end