Method moveFirst

fdbserver/KeyValueStoreSQLite.actor.cpp:750–754

		}
	}
	void moveFirst() {
		int empty = 1;
		db.checkError("BtreeFirst", sqlite3BtreeFirst(cursor, &empty));
		valid = !empty;
	}
	void moveNext() {
		int empty = 1;
		db.checkError("BtreeNext", sqlite3BtreeNext(cursor, &empty));