SAP FUNCTIONS EXPRESSIONS documentation, setup help and example usage

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Functions and Expressions for Operand Positions

Writer Positions
Expressions that can be specified in
writer positions are

Declaration expressions

... DATA(...) ...

... FIELD-SYMBOL(...) ...

Writable expressions

The constructor expressions NEW class( ... )- attr and CAST type( ... )- dobj

Table expressions itab[ ... ] and their chainings

Reader Positions

Functions that can be specified in

reader positions are

Predefined functions

... func( arg ) ...
... func( val = arg p1 = arg1 p2 = arg2 ... ) ...

Functional methods

... meth( ) ...
... meth( a ) ...
... meth( p1 = a1 p2 = a2 ... ) ...
... meth( [EXPORTING p1 = a1 p2 = a2 ...]
[IMPORTING p1 = a1 p2 = a2 ...]
[CHANGING p1 = a1 p2 = a2 ...] ) ...

Method chaining

Chained method call:

... ...- meth1( ... )- meth2( ... )- ...- meth( ... ) ...

Chained attribute access:

... ...- meth1( ... )- meth2( ... )- ...- attr ...

Expressions that can be specified in reader positions are

Calculation expressions :

Arithmetic expressions

... arith_exp ...

Bit expressions

... bit_exp ...

String expressions

... string_exp ...
Constructor expressions :

Instance operator

NEW

Value operator

VALUE

Reference operator

REF

Lossless operator

EXACT

Conversion operator

CONV

Casting operator

CAST

Notes

Functions with numeric return values and arithmetic expressions are combined in numeric expressions .

Functions with character-like return values and string expressions are combined as character-like expressions .

Functions with a byte-like return values and bit expressions are combined as byte-like expressions

.

Example
Numeric expression as an index specified for an internal table.
DATA: itab TYPE STANDARD TABLE OF i,
wa LIKE LINE OF itab,
n TYPE i.

...

READ TABLE itab INDEX lines( itab ) - n
INTO wa.