Method getCursor

fdbserver/KeyValueStoreSQLite.actor.cpp:1658–1665

		void init() override { conn.open(false); }

		Reference<ReadCursor> getCursor() {
			Reference<ReadCursor> cursor = *ppReadCursor;
			if (!cursor || cursor->get().kvBytesRead > SERVER_KNOBS->SQLITE_CURSOR_MAX_LIFETIME_BYTES) {
				*ppReadCursor = cursor = makeReference<ReadCursor>();
				cursor->init(conn);
			}
			return cursor;
		}

		struct ReadValueAction final : TypedAction<Reader, ReadValueAction>, FastAllocated<ReadValueAction> {
			Key key;