'Regex too complicated’ error for large volume of data

I saw Regex too complicated issue in batch process when I was process large string data like csv file data importing.

After my finding I analysis that  in such a case we need to use Iterable<string> in batch process. After that I am able to process large data in batch there was not a such error.

In that case I was created a custom Iterable class. As I had been mention in another blog.


http://solution401.blogspot.in/2014/10/csv-file-data-process-in-salesforce-apex.html