If I execute the following code:

create table Table_Name

(

  PATH varchar(256) NOT NULL flag=1,

  FNAME varchar(256) NOT NULL,

  FTYPE char(4) NOT NULL,

  SIZE double(12,0) NOT NULL flag=5

)

     ENGINE=CONNECT 

     TABLE_TYPE=DIR 

     FILE_NAME='C:\Folder\Subfolder\*.zip'

     OPTION_LIST='subdir=1';

With a folder that contains 31 subfolders, and a total of 30.000 .zip files:

• The SELECT query never ends, as I left it running for more than half an hour without obtaining any results.
• Without the subfolder option (that is, all files in the main folder) works perfectly, obtaining all results in few seconds.

Also I obtain error which does not allow me to start my development server after using this CONNECT ENGINE option:
2017-04-25 16:04:23 9124 [ERROR] mysqld.exe: Got an error writing communication packets

However, it is trivial bug, so it does not have to be considered prioritary.

Thank you a lot for your excellent work!
Juan