AcuSort uses field parameters offset, length, type, and order.
The offset and length are easy to determine if the field is at or near the beginning of the record and there is no packed data. What if the field to be sorted on is somewhere in the middle of a very large record?
Is there a simple way to determine the field parameters?
Generate an extended file descriptor (XFD) for the file by using the -Fx compile option.
The 'Field Section' of the XFD includes the details about each field.
Column one is the offset in bytes.
Column two is the size in bytes.
Column three is the data type.
For example, to sort ascending on the field MORE-DATA that has this XFD description:
0000001892,0000000006,16,0000000006, 00,000,000,03, MORE-DATA
(The offset is 1892 the size is 6 and the type is 16.)
The AcuSort command would be:
acusort sort fields (1892, 6, CH, A)
This table relates the XFD type code to the AcuSort type code:
00 CH Alphanumeric
01 NU Unsigned numeric
02 TS Signed numeric, SIGN IS TRAILING SEPARATE
03 TI Signed numeric, SIGN IS TRAILING
04 LS Signed numeric, SIGN IS LEADING SEPARATE
05 LI Signed numeric, SIGN IS LEADING
06 SB Signed numeric, USAGE COMP
07 BI Unsigned numeric, USAGE COMP
08 C6 Unsigned numeric, USAGE COMP-6
09 PD Signed numeric, USAGE COMP-3
10 C6 Unsigned numeric, USAGE COMP-6
11 SB Signed numeric, USAGE COMP
12 CX Usage COMP-X
13 S5 Signed numeric, USAGE COMP-5
14 C5 Unsigned numeric, USAGE COMP-5
16 CH Alphanumeric
17 CH Alphanumeric
18 CH Alphanumeric
19 CH Alphanumeric
20 CH Alphanumeric
23 FL Usage floating point
See Section 220.127.116.11 of the AcuCOBOL-GT User's Guide for more information on the XFD Field Section.