A very old version of the MySQL site contained a nice header: Speed, Power, Ease of Use. I don’t think that stored programs (routines, triggers, events) were supported, at that time. Now they are, and… developing them is amazingly hard.
There are many problems, for example the language is not flexible and the execution is sloooow. But the biggest problem is that there is no debug API.
In details, one of the biggest problems is that, if you have complex procedures (accessing multiple tables, having error handling, and/or calling other procedures) in practice you have no idea of what warnings occur within your procedures.
MariaDB 10.0 makes things much easier by adding the …[Read more]