This was actually caused by two bugs internally:
* cmd_type was only set in some codepaths, other parts of the code
never set a value. Depending on which query / how was executed,
it was possibly never changed (after a reset to 0)
* the update first set the cmd_type, then reset all counters. As
the cmd_type is stored within the counters for some reason, this
reset its value to 0 in most execution paths, even if it was corretly
set before.
And according to this the fix is simple:
* cmd_type is now set in all codepaths except for failing queries,
as we only have the error string in this case, without the type.
* in the update logic, we again overwrite cmd_type with the proper
value after a reset
61662cc58f