SORT-FILE-SIZE
The SORT-FILE-SIZE special register is the name of a binary data item that you can use to specify the estimated number of records in the sort input file, file-name-1.
Restriction: The SORT-FILE-SIZE special
register is not applicable
to sorting a table with the format 2 SORT statement.
The SORT-FILE-SIZE special register has the implicit definition:
01 SORT-FILE-SIZE GLOBAL PICTURE S9(8) USAGE BINARY VALUE ZERO.
When used in nested programs, this special register is implicitly defined with the global attribute in the outermost program.
SORT-FILE-SIZE is equivalent to the 'FILSZ=Ennn' control statement in the sort control file.
You can specify the SORT-FILE-SIZE special register in a function wherever an integer argument is allowed.