How to Update same table on deletion in MYSQL?

Question

In my database I have a table Employee that has recursive association (an employee can be boss of other employee):

create table if not exists `e         


        

Answer 1

Instead of doing a hard delete, do a soft delete. Add is_deleted column and set it to 1 if you want to delete the row. Create after_update trigger on the table.

DELIMITER $$
    CREATE
    TRIGGER `Employee_after_update` AFTER UPDATE
      ON `Employee`
      FOR EACH ROW BEGIN
      UPDATE Employee
      ...............
      WHERE NEW.is_deleted=1; 
      DELETE FROM Employee WHERE NEW.is_deleted=1
    END$$

I am not sure that you can update the same table for after_{insert,delete,update}. Please check this

Answer 2

Use a stored procedure:

UPDATE b
   SET b.mssn = a.mssn
  FROM EMPLOYEE a
  JOIN EMPLOYEE b ON b.mssn = a.ssn
 WHERE a.ssn = @deletedBoss

DELETE FROM employee WHERE ssn = @deletedBoss

With a stored procedure, you can simply delete the rows you want, and after that, update the same table. That should prevent the error message.