OIUP_REFRESH_TABLE_BUFFER is a standard SAP function module that performs Refresh Table buffer functionality. This is available within standard R/3 SAP systems depending on version and release level.
Below are the pattern details for this FM showing its interface including any import, export and tables parameters. There is also a list of Exceptions and for your convenience any standard documentation available. All this information and more can also be viewed if you enter the function module name OIUP_REFRESH_TABLE_BUFFER into the relevant SAP transaction such as SE37 or SE80.
CALL FUNCTION 'OIUP_REFRESH_TABLE_BUFFER' "Refresh Table buffer EXPORTING tabname = " tabname Table Name . " OIUP_REFRESH_TABLE_BUFFER