Hello Venkat,
Check if this is useful,
https://help.sap.com/saphelp_nw70/helpdata/en/22/042551488911d189490000e829fbbd/content.htm
I understand you're talking about custom RFC's , Considering that all BAPI's are RFC enabled and have/uses table parameters. I don't see any issue in Custom one's.
Thanks,
K Prabhu