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General Expression Positions

General expression positions are reading positions in which suitable data objects, constructor expressions, table expressions, calculation expressions, built-in functions, or functional method calls and method chainings can be specified. The following general expression positions exist:

• Right side of an assignment with the assignment operator =

• Operands of arithmetic expressions and of bit expressions

• Embedded expressions in string templates

• Operands of comparison expressions in logical expressions

• Operand of the statement CASE

• Actual parameters for input parameters of methods in meth( ... ), RAISE EVENT, CREATE OBJECT, and RAISE EXCEPTION or THROW in a conditional expression

• Actual parameters for input parameters of function modules in the case of CALL FUNCTION

• Arguments of built-in numeric functions if they are themselves executed in an arithmetic expression

• Reference variable oref of statement RAISE EXCEPTION oref.

• The operands behind the addition WITH TABLE KEY of the statements READ TABLE itab and DELETE TABLE itab

• The operands behind the addition WITH KEY of the statement READ TABLE itab

• Work area wa of the following statements:

• APPEND wa TO ...

• INSERT wa INTO ...

• MODIFY ... FROM wa ...

• Expression exp for dynamic sorts in the case of the following:

• SORT itab BY exp

• Source fields of the statements WRITE and WRITE TO, with the restriction that arithmetic expressions and bit expressions cannot be specified directly and can be specified only as embedded expressions in string templates

The type restrictions defined by the operand type apply in the operand positions. For example, no numeric functions can be specified in a bit expression.

Other versions: 7.31 | 7.40 | 7.54

Notes

• Specifying functional methods as actual parameters of methods enables the nesting of method calls in an operand position.

• The three types of calculation expression can be executed as operands of relational expressions, but they cannot be mixed in one calculation expression.

Example

Specifies a constructor expressions with the value operator VALUE on the right side of an assignment and specifies a constructor expression with the reduction operator REDUCE as an input parameter for the method DISPLAY of the class CL_DEMO_OUTPUT.

TYPES itab TYPE TABLE OF i WITH EMPTY KEY. 

DATA(itab) = VALUE itab( ( 1 ) ( 2 ) ( 3 ) ). 

cl_demo_output=>display( 
  REDUCE string( INIT s = `` 
                 FOR <wa> IN itab 
                 NEXT s = s &&  <wa> && ` ` ) ).