DB2® passes input
rows to an edit routine. If an input row has fewer fields than the
number of columns in the table, the edit routine must stop processing
the row after the last input field.
Columns for which no input field is
provided and that are not in reordered row format are always at the
end of the row and are never defined as NOT NULL. In this case, the
columns allow nulls, they are defined as NOT NULL WITH DEFAULT, or
the columns are ROWID or DOCID columns.
Use macro DSNDEDIT to
get the starting address and row length for edit exits. Add the row
length to the starting address to get the first invalid address beyond
the end of the input buffer; your routine must not process
any address as large as that.
The following diagram shows how
the parameter list points to other row information. The address of
the nth column description is given by: RFMTAFLD + (n-1)*(FFMTE-FFMT).Figure 1. How the edit exit
parameter list points to row information
