SAP NetWeaver AS ABAP Release 740, ©Copyright 2014 SAP AG. All rights reserved.
Data Objects for Character-Type Operations
The data types that can be interpreted as character types are:
In non-Unicode programs also:
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.