RSDU_RRUL_PRE_INSERT is a standard SAP function module that performs Remodeling Toolbox Before Mass Insert 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 RSDU_RRUL_PRE_INSERT into the relevant SAP transaction such as SE37 or SE80.
CALL FUNCTION 'RSDU_RRUL_PRE_INSERT' "Remodeling Toolbox Before Mass Insert
EXPORTING
i_tabname = " tabname Name of table
IMPORTING
e_subrc = " sy-subrc ABAP System Field: Return Code of ABAP Statements
EXCEPTIONS
INHERITED_ERROR = 1 " Error from Called Routine
. " RSDU_RRUL_PRE_INSERT