How to check if certain fields have changed on Update in PostgreSQL?

Question

PostgreSQL

I have a table with 20 fields. It is necessary to check on UPDATE that the value of 15 of these fields has not changed during the update (the most important ones). If they have changed, then make a record in another table. What is the easiest way to do this?
Whether manually twice to write all titles of fields?

IF NEW.abc <> OLD.abc AND NEW.bac <> OLD.bac AND .... THEN
    INSERT INTO ...;
END IF;

Answer 1

I asked myself, I found the answer myself:

IF ROW(NEW.fieldA, NEW.fieldB, NEW.fieldC) IS DISTINCT FROM 
   ROW(OLD.fieldA, OLD.fieldB, OLD.fieldC) THEN
    -- here code
END IF;