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ABAP Keyword Documentation → ABAP − Reference → Processing Internal Data → Character String and Byte String Processing → Expressions and Functions for String Processing → String Functions → Processing Functions for Character-Like Arguments →segment - Segment Function
Syntax
... segment( val = text index = idx [sep|space = sep] ) ...
Effect
This function returns the occurrence of a segment of the argument text specified by index. A segment is defined by limiters. The beginning and ending of the string in text are the outer limiters. Inner limiters can be passed to sep or space as follows:
The limiters are not part of the segments. If sep or space are not specified, the argument sep is implicitly filled with individual empty spaces. In both cases, specifying an empty string raises an exception of the class CX_SY_STRG_PAR_VAL.
If index is positive, the occurrences are counted from the left; if index is negative, the instance are counted from the right. The values 1, 2, .... indicate the first, second, ... occurrences. The values -1, -2, .... indicate the last, last but one, ... occurrences. If the value of index is 0, or the specified segment does not exist, an exception of the class CX_SY_STRG_PAR_VAL is raised.
sep is a character-like expression position and index is a numerical expression position with type i. If sep has a fixed length, trailing blanks are ignored.
The return code has the type string.
Note
If the substring specified in sep is not found, the entire character string forms a single segment. This segment can only be addressed by using the values 1 or -1 for index.
Example
The following function calls produce "AB", "CD", "EF", "GH", respectively, and raise an exception at the end.
DATA result TYPE string.
DO.
TRY.
result = segment( val = 'AB\brCD\brEF\brGH'
index = sy-index
sep = `\br` ).
...
CATCH cx_sy_strg_par_val.
EXIT.
ENDTRY.
ENDDO.
DO.
TRY.
result = segment( val = 'AB CD - EF_GH'
index = sy-index
space = ` -_` ).
...
CATCH cx_sy_strg_par_val.
EXIT.
ENDTRY.
ENDDO.
Example
Also refer to the example String Functions, cmax, cmin and segment.
Catchable Exceptions
CX_SY_STRG_PAR_VAL