Character String and Byte String Processing for Release 7.0, EhP2
1 String expressions
2 Character string templates
3 Chaining operator
4 String functions
5 Bit functions
6 Management of short strings
7 Streaming for strings
8 Any start values for data objects of the type xstring
9 Maximum length of data objects of the types c , n ,
and x
Latest notes: The program DEMO_EXPRESSIONS
shows examples for character string and byte string processing
for Release 7.0, EhP2 .
ABAP_MODIFICATION_1 Character string expressions
The new character string expressions
enhance the current calculation
expressions and allow character string processing at certain
operand positions . A character string
expression is either a character string
template or a concatenation with the
operator .
ABAP_MODIFICATION_2 Character string templates
Character string templates were
introduced as a new possibility for creating character strings. A
character string template is enclosed between two characters " | "
and creates a character string in a character string expression. The
character string is created from a
literal text,
embedded expressions and
control characters.
Character string templates replace the use of the
WRITE TO statement to a large extent. They can only be used in
Unicode programs .
ABAP_MODIFICATION_3 Chaining operator
The chaining operator
is a new character string operator which chains together two
character-like operands to one operand in a character string expression.
The chaining operator replaces the use of the
CONCATENATE statement to a large extent.
ABAP_MODIFICATION_4 Character String Functions
As a new type of embedded
functions , character string functions have
been introduced. There are:
search functions
similarity functions
processing functions
In addition, the Boolean function
boolc is, in principle, also one of the character string functions.
The string functions enable many string processing tasks to be done in
operand positions where previously separate statements and auxiliary
variables were required.
ABAP_MODIFICATION_5 Bit functions
As a new type of embedded function
, bit functions have been introduced. At
the moment, there is a Bit function bit-set for setting bits.
Furthermore, the Boolean function boolx
is, in principle, also one of the Bit functions.
ABAP_MODIFICATION_6 Management of short strings
To reduce the memory overhead that accumulates during
administration of short strings for their
string headers, their administration has been optimized. For
string lengths of less than 30 characters, or 60 bytes, the
string
header now only requires between 10 and 40 bytes; for longer strings
this is constant at approximately 50 bytes. Before Release 7.0, EhP2
, the overhead of the string headers was not related
to the length of the string and was approximately 60 bytes for each
string.
It is now advisable to use strings instead of data objects for all
character- and byte string operations where a fixed length is not
important.
Latest notes: This change is also available before EhP2 if a
kernel higher than Release 7.0 is used.
ABAP_MODIFICATION_7 Streaming for strings
The new streaming concept supports
strings .
ABAP_MODIFICATION_8 Any start value for data objects of the type
xstring
As of Release 7.0, EhP2 , any suitable start value val
can be specified for xstring after the
VALUE addition to the statements DATA , CONSTANTS
etc. Previously, only IS INITIAL was possible.
ABAP_MODIFICATION_9 Maximum lengths of data objects of the types
c , n , and x
The maximum length of data objects of the types
c and
n was increased from 65,535
to 262,143. The maximum length of data objects of the type
x was increased from 65,535
to 524,287.
Documentation extract taken from SAP system, � Copyright SAP AG. All rights reserved