SAP UNICODE RESTRICTIONS documentation, setup help and example usage

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Differences between Unicode and Non-Unicode Programs
The ABAP key word documentation describes the ABAP statements for both Unicode and non-Unicode systems. Only
Unicode programs can be compiled and executed in Unicode systems. In non-Unicode systems, this is also possible for non-Unicode programs . However, Unicode programs should also be used in non-Unicode systems, for the following reasons:

Static type checks are executed in Unicode programs.

Byte processing and string processing is separated in Unicode programs.

Structures are always handled as structures in Unicode programs.

Uncontrolled access to segments of the working memory is not possible in Unicode programs.

This makes Unicode programs easier to understand, more robust, and easier to maintain than non-Unicode programs.
The following section lists the language constructs and statements for which there are differences between Unicode and non-Unicode programs:

Comments and Literals in Non-Unicode Programs

Names in Unicode Programs

Program Structure of Unicode Programs

Operand Types in Unicode Programs

Alignment in Unicode Systems

Offset and Length Specifications in Unicode Programs

Access to Memory Sequences in Unicode Programs

Conversion of Structures in Unicode Programs

Structure Typing in Unicode Programs

Structure Enhancements and Unicode Programs

String and Byte String Processing in Unicode Programs

Function Module Calls in Unicode Programs

Open SQL in Unicode Programs

File Interface in Unicode Programs

Lists in Unicode Systems

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