Tips and Tricks for the ABAP® Programming Language

Y9020022: Relative Addressing of T fields (time)

Partial association In this example, three T-fields are associated to a field symbol with “ASSIGN”. Each of the three T-fields is associated partially only to the same field symbol.
T-Fields have a constant field length In the example declaration of the T-fields, a 4 byte field and a 12 byte field are contained. Program-internally, these fields are converted to the valid T-field length of 6 bytes, any other length specification is ignored.
Relative addressing by numeric values In examples 1 – 3, constant numeric values are used for the addressing of the data field.
Relative addressing by addressing fields In example 4, the addressing is modified continuously in a do-loop. The thus addressed part of the data field is associated to the field symbol and evaluated.
Modification only in the addressed part If only a part of a data field was associated to a field symbol and the field symbol is used in a memory modifying command, the effects are constrained to the addressed part of the origin field.
Addressing other T-fields By specifying an offset that is a multiple of the origin field length other T-fields can be associated (and hence be modified) as well.

ABAP™-Source-Code

You can cut and paste the source code directly into the ABAP™-Workbench.

REPORT Y9020022 LINE-SIZE 130.   "Release 3.1G, 4.5A
************************************************************************
* Copyright (c) 1999 by CT-Team, 33415 Verl, http://www.ct-software.com
*
*     You can use or modify this report for your own work as long
*               as you don't try to sell or republish it.
*      In no event will the author be liable for indirect, special,
*        Incidental, or consequental damages (if any) arising out of
*                       the use of this report.
*
************************************************************************
 BREAK-POINT.
*//////////////////////////////////////////////////////////////////////*
 MOVE: 'TESTREPORT fuer   "ASSIGN  TFELD+o(l)   TO  <fs1>"        '
        TO SY-TITLE.
*//////////////////////////////////////////////////////////////////////*
***************       Declaration of variables    **********************
 FIELD-SYMBOLS <FS1>.
*.......................................................................
 DATA: TFELD4(6)   TYPE T VALUE '235046'.        "T = always 6 Bytes
 DATA: TFELD6(6)   TYPE T VALUE '201159'.
 DATA: TFELD12     TYPE T VALUE '060401'.        "T = always 6 Bytes
*
*iiiiiiiiiiiiiii
*i Data fiels of the T type (TIME) have a predetermined length of
*i 6 bytes: HHMMSS
*iiiiiiiiiiiiiii
*
 DATA: OFFX    TYPE I VALUE 0.
 DATA: LENX    TYPE I VALUE 2.
*//////////////////////////////////////////////////////////////////////*
*************            -  Main Section             *******************
*//////////////////////////////////////////////////////////////////////*
*
    BREAK-POINT.
  ASSIGN TFELD4+1(5) TO <FS1>.    "<-- Assign of variable to <FS1>
****************** bitte ausprobieren **********************************
* ASSIGN TFELD4+12(6) TO <FS1>. "<--The field TFELD12 ! will be assigned
*
* ASSIGN TFELD4+8(2) TO <FS1>. "<-- No syntax error (middle assign) !!!
*
************************************************************************
    WRITE: / 'ASSIGN command with TFELD4 (Offset and length constant)'
              COLOR 6.
    PERFORM DISPLAY-TFELD USING TFELD4 'TFELD4'.
    ULINE. SKIP 2.
*-----------------------------------------------------------------------
    BREAK-POINT.
 ASSIGN TFELD6+2(4) TO <FS1>.  "<-- Assign of variable to <FS1>
*.......................................................................
    WRITE: / 'ASSIGN command with TFELD6 (Constant offset and length)'
              COLOR 6.
    PERFORM DISPLAY-TFELD USING TFELD6 'TFELD6'.
    ULINE. SKIP 2.
*-----------------------------------------------------------------------
    BREAK-POINT.
 ASSIGN TFELD12+4(2) TO <FS1>. "<-- Assign of variable to <FS1>
*.......................................................................
    WRITE: / 'ASSIGN command with TFELD12 (Constant offset and length)'
             COLOR 6.
    PERFORM DISPLAY-TFELD USING TFELD12 'TFELD12'.
    ULINE. SKIP 2.
*-----------------------------------------------------------------------
*......................................................................
   BREAK-POINT.
   WRITE: / 'ASSIGN command (Offset and length as fields) mit TFELD6'
             COLOR 6.
     DO 3 TIMES.
       WRITE: /5 'DO loop count :' COLOR 5, SY-INDEX.
       ASSIGN TFELD6+OFFX(LENX) TO <FS1>.
       PERFORM DISPLAY-TFELD USING TFELD6 'TFELD6'.
       SKIP 4.
       ADD 2 TO OFFX.
     ENDDO.
*.......................................................................
*
*//////////////////////////////////////////////////////////////////////*
*************                Subroutines             *******************
*//////////////////////////////////////////////////////////////////////*
*
************************************************************************
*             Display of date fields and field symbols                 *
************************************************************************
 FORM DISPLAY-TFELD USING TFELD FNAME.
*
 WRITE: /10 'Content of', FNAME, ':', TFELD.
 PERFORM FELDEIGENSCHAFTEN USING TFELD.
*
 WRITE: /10 'Content of <FS1> :', <FS1>.
 PERFORM FELDEIGENSCHAFTEN USING <FS1>.
*-----------------------------------------------------------------------
 MOVE '15' TO <FS1>.     "<-- The field symbol will be used
*-----------------------------------------------------------------------
 WRITE: /10 'MOVE ''15'' TO <FS1>'.
 ULINE.
*.......................................................................
 WRITE: /10 'Content of', FNAME, 35 ':', TFELD.
 WRITE: /10 'Content of <FS1>',  35 ':', <FS1>.
*.......................................................................
 ENDFORM.
************************************************************************
*    Determination of field properties (only for information)          *
************************************************************************
 FORM FELDEIGENSCHAFTEN USING ALLG.
*
 DATA: FLAENGE(2) TYPE N.
 DATA: FTYP(1) TYPE C.
 DATA: FOUT(2) TYPE N.
 DATA: FDEZ(2) TYPE N.
*.......................................................................
  ULINE.
  DESCRIBE FIELD ALLG LENGTH FLAENGE.
  WRITE: /10 'Field length  :', FLAENGE.
*
  DESCRIBE FIELD ALLG TYPE FTYP.
  WRITE: /10 'Field type    :', FTYP.
*
  DESCRIBE FIELD ALLG OUTPUT-LENGTH FOUT.
  WRITE: /10 'Output length :', FOUT.
*
  DESCRIBE FIELD ALLG DECIMALS FDEZ.
  WRITE: /10 'Decimals      :', FDEZ.
  SKIP 1.
*.......................................................................
 ENDFORM.
************************************************************************
************************************************************************
******************* END OF PROGRAM *************************************