SHARED_BUFFER_DELETE_MDMA is a standard SAP function module that performs 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 SHARED_BUFFER_DELETE_MDMA into the relevant SAP transaction such as SE37 or SE80.
CALL FUNCTION 'SHARED_BUFFER_DELETE_MDMA' "
TABLES
it_mdma_updates = " mdma
. " SHARED_BUFFER_DELETE_MDMA