When I create data base in MEMSQL with the name "evento" for example, it create two others bases automatically, "evento_0" and "evento_1", and if I exclude, the querys in data base "evento" throws error.
What exactly is your question?
When you create a database evento, you will see databases evento_0 etc - they are the partition databases - but users should not see or query those databases, as they exist on the leaves only.