These functions return the character string from text after it has been converted in accordance with the following case rules:
The function to_upper transforms all letters in the character string to uppercase letters.
The function to_lower transforms all letters in the character string to lowercase letters.
The function to_mixed transforms all letters in the character string
to lowercase letters from the second position. It then removes occurrences of the first character specified
in sep from the character string (from left to right from the second position)
and transforms the next letter to an uppercase letter. The default value for separator sep is an underscore
(_). If case is not specified, the first character
of the string remains unchanged. If case is specified and the first character
of case is an uppercase letter, the first character in the string is also
uppercase and then lowercase in all other occurrences. A positive number can be passed to min
to specify a minimum number of characters that must appear before a separator (from the start of the
string or since the last replacement) before the separator becomes effective. The default value for min is 1.
The function from_mixed inserts the first character specified in
sep before each uppercase letter (from left to right and from the second position). The default value for separator sep is an underscore
(_). If case is not specified or if the first
character in case is an uppercase letter, the entire string is displayed
as uppercase; otherwise it is displayed as lowercase. A positive number can be passed to min
to specify a minimum number of characters that must appear before an uppercase letter (from the start
of the string or since the last insert) so that a separator is inserted. The default value for min is 1.
sep is a
character-like expression position. If they have a fixed length, trailing blanks are ignored. min is a
numeric expression
position of type i. case expects a character-like data object with a fixed length. val
= can be omitted only if none of the optional arguments are specified. If sep
is an empty string or if min is negative, an exception of class CX_SY_STRG_PAR_VAL is raised.
The return code has the type string accordingly.
Note
The functions to_mixed and from_mixed are used
to transform standard ABAP naming conventions for names with underscores to standard Java naming conventions
with uppercase and lowercase letters and (namely Mixed Case Style and Camel Case Style) and the other way around.