Select a Group Array Column

Consider what happens when a group array column (GRP2) is selected and passed as is. Four fillers are created: one for column A, one for columns C1 and C2, one for columns D1 through D3, and one for columns E and G. Since GRP2 is nested within GRP1, and GRP1 redefines column B, both column B and GRP1 are preserved.

The file layout is:

Column	Picture Clause	Starting column	Ending column	Storage length
FILLER_1_1	PIC X(1).	1	1	1
B	PIC X(8).	2	9	8
GRP1	REDEFINES B.	2	9	8
FILLER_2_3	PIC X(2).	2	3	2
GRP2	OCCURS 2 TIMES.	4	9	6
FILLER_1	PIC X(3).
FILLER_10_11	PIC X(2).	10	11	2

If the selected array column (GRP2) is flattened, both occurrences (GRP2 and GRP2_2) are loaded into the stage. The file layout is:

Column	Picture Clause	Starting column	Ending column	Storage length
FILLER_1_1	PIC X(1).	1	1	1
B	PIC X(8).	2	9	8
GRP1	REDEFINES B.	2	9	8
FILLER_2_3	PIC X(2).	2	3	2
GRP2		4	6	3
FILLER_1	PIC X(3).	4	6	3
GRP2_2		7	9	3
FILLER_1_2	PIC X(3).	7	9	3
FILLER_10_11	PIC X(2).	10	11	2