Question

I want to write a trigger that includes an UPDATE statement on the same table, like this:

create trigger AFTER INSERT ON myTable
   FOR EACH ROW BEGIN
    update myTable set ... where ...
   end

How can I do this?

Answer 1

Quoting MySQL docs:

A trigger can also affect other tables, but it is not permitted to
modify a table that is already being used (for reading or writing) by
the statement that invoked the function or trigger.