Execution example:: > select --table User --query friends:@tomo --output_columns _key,username [[0,1317212839.60442,0.000260617],[[[5],[["_key","ShortText"],["username","ShortText"]],["ken","å¥ä½"],["taro","ãããã太é"],["jiro","ãããã次é"],["moritapo","森ç°"],["hana","è±å"]]]] > select --table User --query friends:@jiro --output_columns _key,username [[0,1317212839.80577,0.000253172],[[[3],[["_key","ShortText"],["username","ShortText"]],["ken","å¥ä½"],["taro","ãããã太é"],["hana","è±å"]]]]