"re you trying to say that MySQL is not a real database?"
Yup. It's trying very hard to be a real database, but it just isn't yet.
"I think you are wrong, it is stong, powerfull, and gaining strength every day."
No offense, but those people who think MySQL is great are usually also those people who have never worked with a 'real' database and thus simply have no idea about what a real database can do.
"The benchmarks show that MySQL can run with "big dogs". "
Benchmarks mean nothing, especially for mysql. MySQL's complete lack of functionality means you can only run very simple queries, which are ofcourse very fast.
But all the things that real databases can do inside the database have to be done in your application, which makes your application a lot bigger and slower.
But ofcourse, they never mention that in the benchmarks...
Read up on things like Cascading delete, stored procedures, functions, triggers, functional indexes, partial indexes, checks and rules. You'll soon realise that MySQL is nothing more than a toy with which you can play around for a while until you learn more about SQL and find that MySQL just doesn't have any of the functions that make a database usefull.
"A comment like that should be reconsidered."
I've considered my position towards mysql for a long time. I'm not some fool who has heard a few comments and decided to start shouting along. I've been using MySQL, PostgreSQL, Oracle and Informix for too many years to consider mysql a 'real' database.