Declare variable MySQL trigger - mysql

Question

My question might be simple for you, if you're used to MySQL. I'm used to PostgreSQL SGBD and I'm trying to translate a PL/PgSQL script to MySQL.
Here is what I have :
delimiter //
CREATE TRIGGER pgl_new_user
AFTER INSERT ON users FOR EACH ROW
BEGIN
DECLARE m_user_team_id integer;
SELECT id INTO m_user_team_id FROM user_teams WHERE name = "pgl_reporters";
DECLARE m_projects_id integer;
DECLARE cur CURSOR FOR SELECT project_id FROM user_team_project_relationships WHERE user_team_id = m_user_team_id;
OPEN cur;
ins_loop: LOOP
FETCH cur INTO m_projects_id;
IF done THEN
LEAVE ins_loop;
END IF;
INSERT INTO users_projects (user_id, project_id, created_at, updated_at, project_access)
VALUES (NEW.id, m_projects_id, now(), now(), 20);
END LOOP;
CLOSE cur;
END//
But MySQL Workbench gives me an error on DECLARE m_projects_id. I don't really understand because I've the same instruction two lines above...
Any hints ?
EDIT: neubert solved this error. Thanks.
But yet, when I try to insert into users :
Error Code: 1329. No data - zero rows fetched, selected, or processed
Do you have any idea ? Or better, do you know how I can get a better error message ?

Answer 1

All DECLAREs need to be at the top. ie.
delimiter //
CREATE TRIGGER pgl_new_user
AFTER INSERT ON users FOR EACH ROW
BEGIN
DECLARE m_user_team_id integer;
DECLARE m_projects_id integer;
DECLARE cur CURSOR FOR SELECT project_id FROM user_team_project_relationships WHERE user_team_id = m_user_team_id;
SET #m_user_team_id := (SELECT id FROM user_teams WHERE name = "pgl_reporters");
OPEN cur;
ins_loop: LOOP
FETCH cur INTO m_projects_id;
IF done THEN
LEAVE ins_loop;
END IF;
INSERT INTO users_projects (user_id, project_id, created_at, updated_at, project_access)
VALUES (NEW.id, m_projects_id, now(), now(), 20);
END LOOP;
CLOSE cur;
END//

Answer 2

Agree with neubert about the DECLARE statements, this will fix syntax error. But I would suggest you to avoid using openning cursors, they may be slow.
For your task: use INSERT...SELECT statement which will help you to copy data from one table to another using only one query.
INSERT ... SELECT Syntax.