* about CurrentCmdInvalidMsgs too, since those changes haven't touched
* the caches yet.
*
+ * We still send invalidation messages for session-local objects to other
+ * backends because, while other backends cannot see any tuples, they can
+ * drop tables that are session-local to another session.
+ *
* In any case, reset the various lists to empty. We need not physically
* free memory here, since TopTransactionContext is about to be emptied
* anyway.