abap programing

[Former Member]

how can i know whether iam working in unicode or nonunicode programing environment

[Former Member]

Hi,

Check the attributes of a programe.

I u r working on unicode there will be a tick mark .

Assign points if useful

[Former Member]

Hi

Click on Goto->Attributes and check Unicode check active checkbox is cheked or not.

Thanks

Vijay

<b>PLZ reward points if helpful</b>

[Former Member]

Hi

Unicode - Overview

Before release 6.10, SAP supported different codes for representing characters of different fonts, for example ASCII, EBCDIC as single-byte code pages or double-bytecode pages:

ASCII (American Standard Code for Information Interchange) encodes every character with one byte. This means that a maximum of 256 characters can be displayed (strictly speaking, standard ASCII only encodes one character using 7 bit and can therefore only represent 128 characters. The extension to 8 bit is introduced with ISO-8859). Examples of common code pages are ISO-8859-1 for Western European, or ISO-8859-5 for Cyrillic fonts.

EBCDIC (Extended Binary Coded Decimal Interchange) also encodes each character using one byte, and can therefore also represent 256 characters. For example,EBCDIC 0697/0500 is an IBM format that has been used on the AS400 platform for Western European fonts.

Double byte code pages require between 1 and 2 bytes per character. This enables the representation of 65,536 characters, of which only 10,000 to 15,000 characters are normally used. For example, the code page SJIS is used for Japanese and BIG5 for traditional Chinese fonts.

Using these character sets, all languages can be handled individually in one ABAP-based SAP system. Difficulties arise if texts from different incompatible character sets are mixed in one central system. The exchange of data between systems with incompatible character sets can also lead to problems.

The solution to this problem is the use of a character set that includes all characters at once. This is realized by Unicode Unicode (ISO/IEC 10646) . A variety of Unicode character representations is possible for the Unicode character set, for example UTF, in which a character can occupy between one and four bytes.

From release 6.10, the SAP NetWeaver Application Server supports both Unicode and non-Unicode systems. Non-Unicode systems are conventional ABAP systems, in which one character is usually represented by one byte. Unicode systems are ABAP systems that are based on a Unicode character set and which have a corresponding underlying operating system, including a database.

Before release 6.10, many ABAP programming methods were based on the fact that one character corresponds to one byte. Before a system is converted to Unicode, ABAP programs must therefore be modified at all points where an explicit or implicit assumption is made about the internal length of a character.

ABAP supports this conversion using new syntax rules and new language constructs, whereby emphasis was placed on retaining as much of the existing source code as possible. As a preparation for the conversion to Unicode - but also independently of whether a system will actually be converted to Unicode - the checkbox Unicode checks active can be selected in the program properties. The transaction UCCHECK supports the activation of this check for existing programs. If this property is set, the program is identified as a Unicode program. In a Unicode program, an additional stricter syntax check is performed than in non-Unicode programs. In some cases, statements must also be enhanced by using new additions. A syntactically correct Unicode program will normally run with the same semantics and the same results in Unicode and non-Unicode systems. (Exceptions to this rule are low-level programs that query and evaluate the number of bytes per character). Programs that are required to run in both systems should therefore also be tested on both platforms.