Is any relation between tables bbp_pdatt with any of the item table

Hi all,

I have created shopping cart with 2 line items and each line item is having 2 attachments.

Now I am having the attachment data in table bbp_pdatt .and we have item data also.

I could not get the line item number or data in table bbp_pdatt.In table bbp_pdatt only attachment data exist.

I want to know for which line item the attachment belongs to.

Please tell me if there is any table having the attachment data as well as item data.in single table.

Thanks,

Prashanth.