SQL trigger after update update next row

Question

I have a table that looks something like this:

Columns:
user_id int(11) PK
module_id   int(11) PK
academy_team_id int(11) PK
academy_id  int(11) PK
sort_number int(11)
is_complete int(11)
score_to_pass   int(11)
is_open int(11)

Now i wish to add a trigger so that when you update this table if the value is_complete is equal to 1 then update the next row's is_open and set it to 1

I have attempted with the following trigger sql:

   begin
 if new.is_complete = 1 then
   set next.is_open = 1;
 end if ;
end

Sadly this did not work so im not sure how to do it can anyone push me in the right direction?

According to pala_ Answer

im getting the following error when updating my row:

    ERROR 1442: 1442: Can't update table 'user_has_academy_module' in stored function/trigger because it is already used by statement which invoked this stored function/trigger.
SQL Statement:
UPDATE `system`.`user_has_academy_module` SET `is_complete`='1' WHERE `user_id`='1' and`module_id`='11' and`academy_team_id`='49' and`academy_id`='29'

Answer 1

Your basic trigger body should be something like this:

 begin if new.is_complete = 1 and (select id from <table> where user_id = new.user_id and module_id = new.module_id and academy_team_id = new.academy_team_id sort_number = new.sort_number +1 ) then update <table> set is_open = 1 where user_id = new.user_id and academy_team_id = new.academy_team_id and module_id = new.module_id and sort_number = new.sort_number + 1; end if end 

It will check to see if there IS another thing to set open (based on same user_id , academy_team_id and module_id , and next sequential sort_number ), and if there is, set it open.

MySQL cant update the same table the trigger is set on. It will need to be done with a stored procedure instead.

delimiter //
create procedure completeandopen(IN param INT)
begin
  declare next_id integer;
  declare _user_id integer;
  declare _module_id integer;
  declare _academy_team_id integer;
  declare _sort_number integer;

  select user_id, 
         module_id, 
         academy_team_id, 
         sort_number 
  into   _user_id, 
         _module_id, 
         _academy_team_id, 
         _sort_number 
  from tester 
  where id = param;

  update tester set is_complete = 1 where id = param;
  select id 
  into   next_id 
  from tester 
  where id = param + 1 
    and user_id = _user_id 
    and module_id = _module_id 
    and academy_team_id = _academy_team_id 
    and sort_number = _sort_number + 1;
  if (next_id is not null) then
    update tester set is_open = 1 where id = next_id;
  end if;
end//
delimiter ;

I think this should work - i haven't tested on your table structure, and it does assume a unique primary key on your table. If it doesn't have that - it's easy enough to modify.

To use it, just call completeandopen(id of the row to be completed) (after changing the table name from tester to your table name)