systems variables

[Former Member]

what are systems variables ?

Regards,

Jagan

[Former Member]

The ABAP system fields are active in all ABAP programs. They are filled by the runtime environment, and you can query their values in a program to find out particular states of the system. Although they are variables, you should not assign your own values to them, since this may overwrite information that is important for the normal running of the program. However, there are some isolated cases in which you may need to overwrite a system variable. For example, by assigning a new value to the field SY-LSIND, you can control navigation within details lists.

The names and data types of the system fields are contained in the ABAP Dictionary structure SYST. To address them in an ABAP program, use the form SY-<fieldname>. Within screen flow logic, you can also use the form SYST-<fieldname>.

Regards,

Satya

[Former Member]

Hi,

The system variables contain system information. You can use all the system SY fields in CATT. The names of the SY fields are in the Dictionary structure SYST.

Examples of system fields:

SY-LANGU (logon language)

SY-UZEIT (current time)

SY-DATUM (current date)

SY-UNAME (user name)

Regards,

swami.

[Former Member]

ABAP system fields are always available in ABAP programs. The runtime system fills them according to context. They can then be used in programs to query the system status. System fields are variables but you should always treat them as though they were constants, and only read them. If you change their values, important information for the flow of the program may be lost. In exceptional circumstances, system fields may be overwritten in an ABAP program to control the system – for example, SY-LSIND (for navigating to a detail list).

With one exception the names and data types of the system fields are stored in the ABAP Dictionary in the SYST structure and realized as components of the predefined structure SY in ABAP programs.

The system field SY-REPID is not part of SYST or SY. Instead, every program contains the predefined constants SY-REPID and SYST-REPID, which both contain the name of the corresponding program. Furthermore, there are two predefined types of the same name, SY-REPID and SYST-REPID.

All system fields are addressed using SY field name and their types using SYST field name.

here is a list of some important system variables

INDEX

SYINDEX

INT4

10

0

Loops, number of current pass

PAGNO

SYPAGNO

INT4

10

0

List creation, current page

TABIX

SYTABIX

INT4

10

0

Internal table, current line index

TFILL

SYTFILL

INT4

10

0

Internal tables, current number of lines

DBCNT

SYDBCNT

INT4

10

0

DB operations, number of table lines processed

FDPOS

SYFDPOS

INT4

10

0

Character strings, offset in character string

COLNO

SYCOLNO

INT4

10

0

List creation, current column of list

LINCT

SYLINCT

INT4

10

0

List processing, page length of list

LINNO

SYLINNO

INT4

10

0

List creation, current line

LINSZ

SYLINSZ

INT4

10

0

List creation, width of list

SUBRC

SYSUBRC

INT4

10

0

Return value, return value after ABAP statements

LILLI

SYLILLI

INT4

10

0

List processing, current list line

LSIND

SYLSIND

INT4

10

0

List processing, details list index

STEPL

SYSTEPL

INT4

10

0

Screens, current table line index

LOOPC

SYLOOPC

INT4

10

0

Screens, number of lines visible in table

LANGU

SYLANGU

LANG

1

0

R/3 System, current language

MANDT

SYMANDT

CLNT

3

0

R/3 System, client number from logon

DBSYS

SYDBSYS

CHAR

10

0

R/3 System, name of central database system

SYSID

SYSYSID

CHAR

8

0

R/3 System, name of R/3 System

SAPRL

SYSAPRL

CHAR

4

0

R/3 System, system release

TCODE

SYTCODE

CHAR

20

0

ABAP program, current transaction code

DATUM

SYDATUM

DATS

8

0

Date and time, current (application server) date

UCOMM

SYUCOMM

CHAR

70

0

Screens, function code triggered by PAI

UZEIT

SYUZEIT

TIMS

6

0

Dat and time, current application server time

UNAME

SYUNAME

CHAR

12

0

R/3 System, user logon name

MSGLI

SYMSGLI

CHAR

60

0

Messages, message line

TITLE

SYTITLE

CHAR

70

0

Screens, title text

LISEL

SYLISEL

CHAR

255

0

List processing, contents of selected line

ULINE

SYULINE

CHAR

255

0

Constants, horizontal line with length 255

MSGID

SYMSGID

CHAR

20

0

Messages, message class

MSGID

SYMSGID

CHAR

20

0

Messages, message class

MSGTY

SYMSGTY

CHAR

1

0

Messages, message type

MSGNO

SYMSGNO

NUMC

3

0

Messages, message number

MSGV1

SYMSGV

CHAR

50

0

Messages, message variables

MSGV2

SYMSGV

CHAR

50

0

Messages, message variables

MSGV3

SYMSGV

CHAR

50

0

Messages, message variables

MSGV4

SYMSGV

CHAR

50

0

Messages, message variables

VLINE

SYVLINE

CHAR

1

0

Constants, vertical bar

HOST

SYHOST

CHAR

32

0

R/3 System, Name of application server

the link is

http://abaplovers.blogspot.com/2008/02/list-of-important-system-variables.html

do reward if helpful

[Former Member]

system variables are available to the every abap program.these system variables are available in syst table in the abap dictionery.system variables means system defaultly provides some variables to your program.theses system variables are available to every abap program.no need to import any table or package for this purpose. defaultly available to the every program.the system variables are look like this sy-.....,or syst-.......

in old vertions system variables use like syst-...... .and now in new vertions useing like sy-.......there is nothing difference between two of them.