When you run ABAP mappings in PowerCenter to read data from SAP tables, you can configure HTTP streaming. HTTP stream mode sessions use background processing. Use HTTP stream mode when the data volume is high and the extraction time exceeds the limit for dialog processes.
To extract data through stream mode by using the HTTP protocol, you must generate and install the ABAP program in stream mode, and configure the session to use the SAP Streaming Reader, an SAP R/3 application connection, and an SAP ABAP HTTP streaming connection. You must also have authorizations on the SAP system to read SAP tables and to run stream mode sessions.