SAP DATA OBJECTS USAGE CHARLIKE

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ARTICLE

Data Objects for Character-Type Operations

The data types that can be interpreted as character types are:

C
Character

N
Numeric character

D
Date

T
Time

STRING
Character string

Flat structures
Structures that do not contain any references, internal tables, or
strings.
In non-Unicode programs also:

X
Hexadecimal

XSTRING
Hexadecimal string
Literals of the 'xxxx' and `yyyy` kind are character-type, as are text elements ('TEXT-xxx', ''xxxx'(xxx)'). Literals of the nnnn kind (numeric literals) are not character-type.
In Unicode progams, stricter constraints apply to character-type operands.