It is known that Excel sheets can display a maximum of 1 million rows. Is there any row limit for csv data, i.e. does Excel allow more than 1 million rows in csv format?
In my memory, excel (versions >= 2007) limits the power 2 of 20: 1.048.576 lines.
Csv is over to this boundary, like ordinary text file. So you will be care of the transfer between two formats.