SAP FUNCTIONS EXPRESSIONS
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ARTICLE
Functions and Expressions for Operand Positions ITOC
Writer PositionsExpressions 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 • lines( itab ) - n
INTO wa.
