9. PROCESSING › 9.2 Daily Update Processing Flow › 9.2.2 Input Phase

9.2.2 Input Phase

The Input Phase reads data records from the file defined by
the INPUTSMF dd statement.  It checks for a VSAM input file
and adjusts its internal pointers accordingly.  The record
length is checked to verify that the record is of the proper
format.  The record type is checked and non-RMF records are
ignored.  The user exit USRSEL is executed if defined.

During the input phase, the checkpoint file is checked to
prevent data which has already been input to CA MICS from
being input to CA MICS a second time.