Well if you grep for MySQL gotchas you should find a bunch of them. One did bite me hard one day. I wanted to add a simple check constraint on a column, as I di

Well if you grep for MySQL gotchas you should find a bunch of them. One did bite me hard one day. I wanted to add a simple check constraint on a column, as I did often on PG. A quick glance at the doc, I send the ADD CONSTRAINT command, and, no news is good news, I thought everything was all set and good. But in fact the beast did just ignore my command! After careful check in the docs in some case the constraints are ignored because not implemented. That's crazy. How would you rate a shell that just said nothing and copied nothing when asked to copy an important backup file somewhere? For me it is the hell of software, not even telling there is something wrong. The vessel is in danger when the captain don't know her position, but in much greater danger when he is not even knowing he doesn't know where she is.