First time I played with MySQL I was bit by this when I was writing a personal app that was supposed to work with MySQL and Postgres. Thought all my schema was

First time I played with MySQL I was bit by this when I was writing a personal app that was supposed to work with MySQL and Postgres. Thought all my schema was fine, then ended up running into a whole bunch of bugs my check constraints were supposed to prevent when using MySQL. I just dropped support for MySQL after that.