Hi, you have to use SAP Connector to extract info to the report sap.
With this connector you could get info about sap tables, sap report, sap query , etc
this connector is not free , you have to purchase
see this link and the attach
In addition to what Joseph and Fernando provided, I am attaching one more document which will be useful.
SAP Connector is not free but Qlik provides SAP connector which is certified by Qlik. I will highly recommend you to use this as it reads full SAP data dictionary and compatible with R3 version 4.6 and above & Business Warehouse 3.1 and above.
QlikView for SAP.pdf 1.8 MB