Bug Report: Parsing OK response from MariaDB can fail during import

[dbussink]

Overview of the Issue

While MariaDB support is deprecated (see #9518), we still support importing data from MariaDB through an unmanaged tablet.

Since #10871 we always enable session state tracking as a client capability, but it turns out that MariaDB can return a packet where the SERVER_SESSION_STATE_CHANGED bit is set, but subsequently no additional information is available in the packet.

This then errors with the following error:

invalid OK packet session state change length: &{[254 0 0 34 64 0 0] 0}

Reproduction Steps

Import data from a recent MariaDB instance

Binary Version

15 and later

Operating System and Environment details

n/a

Log Fragments

-