Is there a way to iterate with all key-value pairs in LMDB database, where
all keys is in specified range?
I'm trying to use mdb_cursor_get() with MDB_SET_RANGE to search first pair.
Then I see only one way - use mdb_cursor_get() with MDB_NEXT and compare
key by memcmp().
But it seems absolutely not effective.
Is there another solution for my task?