on update current_timestamp with SQLite

Question

I want to update a field with the current timestamp whenever the row is updated.

In MySQL I would do, when declaring the table

LastUpdate TIMESTAMP D         


        

Answer 1

There is more efficient, nice and clean way to do it, for example:

-- List all required fields after 'OF' except the LastUpdate field to prevent infinite loop
CREATE TRIGGER UpdateLastTime UPDATE OF field1, field2, fieldN ON Package
BEGIN
  UPDATE Package SET LastUpdate=CURRENT_TIMESTAMP WHERE ActionId=ActionId;
END;

The code like this one has been tested in my project. Deep sqlite trigger explanation can be found here https://www.sqlite.org/lang_createtrigger.html