What is Syntax for BDC Call Transaction?
BDC Call transaction <tcode>
Using BDCDATA (STRUCTURE FOR DATA UPDATE)
UPDATE A/S (A=ASYNCHORONOUS, S=SYNCHORONOUS)
MODE A/N/E (ALL DISPLAY, NO DISPLAY, ERROR DISPLAY)
MESSAGE INTO BDCMSGCOLL (STRUCTUR E FOR MESSAGES)
So if you use UPDATE S then it will UPDATE DATABASE SYNCHRONOUSLY.