[CAUTION]
====
At the time of writing, you cannot use the following features if you connect to your database through ProxySQL.
If you try, you will see this error message:

----
RECEIVED AN UNKNOWN COMMAND: 28 -- PLEASE REPORT A BUG
----

This is because the proxy does not handle a type of command (`COM_STMT_FETCH`) that is required to fetch rows from a cursor.
====