Interprets rec1 and rec2 as field strings.
If, for example, rec1 and rec2 are tables, executes the
statement for their header lines.
Searches for all sub-fields which occur both in rec1 and
rec2 and then generates, for all relevant field pairs
corresponding to the component fields ni , statements of the form
SUBTRACT rec1-ni FROM rec2-ni.
The other fields remain unchanged.
With complex structures, the full names of the field pairs must be
identical.
Example
DATA: BEGIN OF PERSON,
NAME(20) VALUE 'Paul',
MONEY TYPE I VALUE 5000,
END OF PERSON,
BEGIN OF PURCHASES OCCURS 10,
PRODUCT(10),
MONEY TYPE I,
END OF PURCHASES.
PURCHASES-PRODUCT = 'Table'.
PURCHASES-MONEY = 100.
APPEND PURCHASES.
PURCHASES-PRODUCT = 'Chair'.
PURCHASES-MONEY = 70.
APPEND PURCHASES.
LOOP AT PURCHASES.
SUBTRACT-CORRESPONDING PURCHASES FROM PERSON.
ENDLOOP.
The value of PERSON-MONEY is now 4830. The above
SUBTRACT-CORRESPONDING statement (executed twice here) is
equivalent to:
