SAP EXPRESSIONS documentation, setup help and example usage

ARTICLE

Expressions
The following expressions can be constructed in certain operand positions :

Writer positions

Declaration expressions

Certain constructor expressions

Certain table expressions

Reader positions

Logical expressions

Constructor expressions

Table expressions

Arithmetic expressions

String expressions

Bit expressions

An expression in a writer position produces a result to which a value is assigned.
An expression in a reader position produces a result that is used as an operand in the statement. Logical expressions can contain
calculation expressions (arithmetic expressions, string expressions, and bit expressions) as relational expressions. The three different calculation expression types cannot currently be mixed in a single calculation expression.

Note
Although the calculation expression types cannot be mixed directly, a different type of expression can be used as an argument of a permitted function in another expression. In the same way, logical expressions can be used as arguments of Boolean functions
in calculation expressions.