Method xDisconnect

src/util/custom-table.cpp:157–160

	}

	static int xDisconnect(sqlite3_vtab* vtab) {
		delete VTab::Upcast(vtab);
		return SQLITE_OK;
	}

	static int xOpen(sqlite3_vtab* vtab, sqlite3_vtab_cursor** output) {
		*output = (new Cursor())->Downcast();