Blocking '0000-00-00' from MySQL Date Fields

Question

I have a database where old code likes to insert \'0000-00-00\' in Date and DateTime columns instead of a real date. So I have the following two questions:

1. Is

Answer 1

This is the trigger I use:

delimiter //
CREATE TRIGGER bad_date BEFORE INSERT ON some_table
    FOR EACH ROW
        BEGIN
            IF NEW.the_date='0000-00-00' THEN 
                SET NEW.the_date= CURDATE();
            END IF;
        END;//

If updates are a concern, add a separate trigger (BEFORE UPDATE) to do the same thing.