{
    "_yql_view_library"="PRAGMA Library('nested_library.sql', 'http_test://nested_library.sql.txt'); import nested_library symbols $to_lower; SELECT key, subkey, value, $to_lower(key) as lower_key from self";
    "_yql_syntax_version_library"=1;
    "_yql_row_spec" = {
        "Type" = [
            "StructType";
            [
                [
                    "key";
                    [
                        "DataType";
                        "String"
                    ]
                ];
                [
                    "subkey";
                    [
                        "DataType";
                        "String"
                    ]
                ];
                [
                    "value";
                    [
                        "DataType";
                        "String"
                    ]
                ]
            ]
        ]
    }
}