There are total of 172 system fields maintained by the runtime environment in an internal structure of type SYST or SY.
SYSTEM FIELDS according to function.
SYSTEM Fields related with R/3 System
SY-DBSYS : R/3 DBMS like ORACLE.
SY-HOST : Application server .
SY-OPSYS : Application server Operating system .
SY-SYSID : R/3 System ID.
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SYSTEM Fields about Current Terminal Session
SY-LANGU : One-character language key with the user’s logon language such as E
SY-MANDT : Login client e.g. 600 SY-MODNO Index of the current external session starting from 0.
SY-UNAME : Login name of the user.
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SYSTEM Fields related with current Date and Time
SY-DATUM :
Date on the application server in YYYYMMDD format e.g. 20060414 SY-FDAYW
Day of the week according to Factory calendar e.g Monday = 1. SY-TIMLO User’s local time.
SY-UZEIT: Time on the application server.
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SYSTEM Fields related with Current ABAP Program
SY-CALLD : If the program is started using CALL TRANSACTION / DIALOG, or SUBMIT … [AND RETURN] its value is 'X'.If the program is started using LEAVE TO TRANSACTION or using a transaction code from a screen or when a batch input session is in progress its value is ' ' .
SY-CPROG : The name of the current program and name of the calling program within a procedure.
SY-DBNAM : The name of the logical database linked to an executable program.
SY-DYNGR : Screen group to which the current screen belongs.
SY-DYNNR : Number of the current screen.
SY-LDBPG : In executable programs, the database program of the associated logical database.
SY-REPID : Name of the current ABAP program.
SY-TCODE : The transaction code of the current program..
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SYSTEM FIELDS for Background Processing and batch input
SY-BATCH : X if the ABAP program is running in the background, otherwise space
SYSTEM FIELDS for Batch Input
SY-BINPT : X while a batch input session is running and when an ABAP program is called using CALL TRANSACTION USING, otherwise space.
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SYSTEM FIELDS For ABAP Programming
SY-ABCDE
It is a constant and contains alphabets(AB..Z). What ever the code page its value remains same.
SY-ULINE Contains a horizontal line with length 255 used in creating lists.
SY-VLINE Contains a vertical line , used in creating lists.
Loops SY-INDEX WithIn a loop it contains the number of loop passes including the current pass and is set by ABAP commands DO,WHILE.
Strings SY-FDPOS It contains the location of a hit in string operations. used with CO,CN, CA, NA, CS, NS, CP, and NP, offset values are assigned to SY-FDPOS depending on the search result.
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Internal Tables
SY-TABIX Current line of an internal table. It is set only for index tables. The field is either not set or is set to 0 for hashed tables. It iset by ABAP commands APPEND,COLLECT,LOOP AT,READ TABLE,SAERCH itab FOR .
SY-TFILL After the statements DESCRIBE TABLE, LOOP AT, and READ TABLE, SY-TFILL contains the number of lines in the relevant internal table. Database Access
SY-DBCNT
It contains the number of table entries processed. In an loop it is not set until after the ENDSELECT or ENDEXEC statement. It is set by ABAP commands DELETE,FETCH,INSERT,MODIFY and UPDATE.
SY-SUBRC
Return code set by the last ABAP statement. if it is 0 it means the statement was a success.
SYSTEM FIELDS for Screens
A group of system fields is set in the PAI event of each screen. Exceptf SY-DATAR, SY-LOOPC, and SY-STEPL, these can be used in list processing.
SY-CUCOL Horizontal cursor position. Counter begins at column 2.
SY-CUROW Vertical cursor position. Counter begins at line 1.
SY-DATAR This field contains 'X' if at least one input field on the screen was changed by the user , otherwise it is space.It can be used to determine if user has made any changes and a popup can be called with a prompt
e.g. POPUP_TO_CONFIRM_CHANGE.
SY-LOOPC Number of lines currently displayed in a table control. Can be used to determine the step loop blocks in the screen and for scrolling functionality.
SY-PFKEY GUI status of the current screen. This can be set in the PBO event using the SET PF-STATUS statu OF PROGRAM rep statement.
SY-SCOLS Number of columns on the current screen.
SY-SROWS Number of rows on the current screen.
SY-STEPL Index of the current line in a table control. This is set in each loop pass. SY-STEPL does not have a meaningful value outside the loop (for example, during the POV event for a table line).
SY-TITLE It contains the text that appears in the title bar of the screen. For selection screens and lists it is the program name,it can be set using the SET TITLEBAR statement.
SY-UCOMM It contains the function code that triggered the PAI event.ENTER triggers the PAI but this field will remain blank if no function code is attached to ENTER key.
SY-CUCOL Horizontal cursor position. Counter begins at column 2.
SY-CUROW Vertical cursor position. Counter begins at line 1.
SY-DATAR This field contains 'X' if at least one input field on the screen was changed by the user , otherwise it is space.It can be used to determine if user has made any changes and a popup can be called with a prompt
e.g. POPUP_TO_CONFIRM_CHANGE.
SY-LOOPC Number of lines currently displayed in a table control. Can be used to determine the step loop blocks in the screen and for scrolling functionality.
SY-PFKEY GUI status of the current screen. This can be set in the PBO event using the SET PF-STATUS statu OF PROGRAM rep statement.
SY-SCOLS Number of columns on the current screen.
SY-SROWS Number of rows on the current screen.
SY-STEPL Index of the current line in a table control. This is set in each loop pass. SY-STEPL does not have a meaningful value outside the loop (for example, during the POV event for a table line).
SY-TITLE It contains the text that appears in the title bar of the screen. For selection screens and lists it is the program name,it can be set using the SET TITLEBAR statement.
SY-UCOMM It contains the function code that triggered the PAI event.ENTER triggers the PAI but this field will remain blank if no function code is attached to ENTER key.
Selection Screens
SY-SLSET Variant used to fill the selection screen.
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SYSTEM FIELDS for Creating Lists
SY-COLNO It contains the current column during list creation starting at 1. The field is set by the output statements WRITE,ULINE,SKIP,POSITION,NEW-LINE,NEW-PAGE and BACK (sets it to 1).
SY-LINCT It contains length of the page in the list.Its value is 0 if the length of page is infinite.
SY-LINNO It contains the current line during list creation begining from 1, and includes the page header. SY-LINNO is set by the ABAP output statements which are same as SY-COLNO.
SY-LINSZ It contains the line width in the list. The default value is the default window width. You can change the line width of the list using the LINE-SIZE addition in the REPORT or NEW-PAGE statement. The default value is 84 .
SY-PAGNO Current page during list creation.
SY-TVAR0 ... SY-TVAR9 You can assign values to these variables in your programs. Their contents replace the placeholders in the list and column headers of the program in the TOP-OF-PAGE event.
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SY-LINNO It contains the current line during list creation begining from 1, and includes the page header. SY-LINNO is set by the ABAP output statements which are same as SY-COLNO.
SY-LINSZ It contains the line width in the list. The default value is the default window width. You can change the line width of the list using the LINE-SIZE addition in the REPORT or NEW-PAGE statement. The default value is 84 .
SY-PAGNO Current page during list creation.
SY-TVAR0 ... SY-TVAR9 You can assign values to these variables in your programs. Their contents replace the placeholders in the list and column headers of the program in the TOP-OF-PAGE event.
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SYSTEM FIELDS For Messages
With call of MESSAGE statement following system fields are set.
SY-MSGID SY-MSGID contains the message class.
SY-MSGNO SY-MSGNO contains the message number
SY-MSGTY SY-MSGTY contains the message type
SY-MSGV1,…,SY-MSGV4 These fields hold the place holders in the message.
With call of MESSAGE statement following system fields are set.
SY-MSGID SY-MSGID contains the message class.
SY-MSGNO SY-MSGNO contains the message number
SY-MSGTY SY-MSGTY contains the message type
SY-MSGV1,…,SY-MSGV4 These fields hold the place holders in the message.
