CREATE PROCEDURE prepare_data()
BEGIN
    DECLARE i INT DEFAULT 1;

    WHILE i < 100
        DO
            INSERT INTO webshop.user(is_active, name, lower_name, email)
            VALUES ('1', 'harry', 'potter', 'test@test.de');
            SET i = i + 1;
        end while;
end;

CALL prepare_data();