SUBTRACT-CORRESPONDING

Basic form

SUBTRACT-CORRESPONDING rec1 FROM rec2.

Effect

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:


SUBTRACT PURCHASES-MONEY FROM PERSON-MONEY.

Note

All fields of the same name are subtracted, whether they are numeric or not. Here, the conversions performed are the same as with SUBTRACT and the same runtime errors can occur.
Related SUBTRACT
MOVE-CORRESPONDING
ADD-CORRESPONDING
MULTIPLY-CORRESPONDING
DIVIDE-CORRESPONDING

Index
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