ABAP Select data from SAP table VLCACTDATA_SD_HEAD_S into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VLCACTDATA_SD_HEAD_S table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to VLCACTDATA_SD_HEAD_S. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the VLCACTDATA_SD_HEAD_S table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_VLCACTDATA_SD_HEAD_S TYPE STANDARD TABLE OF VLCACTDATA_SD_HEAD_S,
      WA_VLCACTDATA_SD_HEAD_S TYPE VLCACTDATA_SD_HEAD_S,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <VLCACTDATA_SD_HEAD_S> TYPE VLCACTDATA_SD_HEAD_S.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_VLCACTDATA_SD_HEAD_S.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM VLCACTDATA_SD_HEAD_S
  INTO TABLE IT_VLCACTDATA_SD_HEAD_S.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VLCACTDATA_SD_HEAD_S
*  INTO TABLE @DATA(IT_VLCACTDATA_SD_HEAD_S2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_VLCACTDATA_SD_HEAD_S INDEX 1 INTO DATA(WA_VLCACTDATA_SD_HEAD_S2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_VLCACTDATA_SD_HEAD_S ASSIGNING <VLCACTDATA_SD_HEAD_S>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VLCACTDATA_SD_HEAD_S>-VKORG = 1.
<VLCACTDATA_SD_HEAD_S>-VTWEG = 1.
<VLCACTDATA_SD_HEAD_S>-SPART = 1.
<VLCACTDATA_SD_HEAD_S>-AUART = 1.
<VLCACTDATA_SD_HEAD_S>-FKARA = 1.

ENDLOOP.

LOOP AT IT_VLCACTDATA_SD_HEAD_S INTO WA_VLCACTDATA_SD_HEAD_S.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VLCACTDATA_SD_HEAD_S-VBELN, sy-vline,
  WA_VLCACTDATA_SD_HEAD_S-PRECEDING_DOC, sy-vline,
  WA_VLCACTDATA_SD_HEAD_S-PREC_DOC_POSNR, sy-vline,
  WA_VLCACTDATA_SD_HEAD_S-KUNNR, sy-vline,
  WA_VLCACTDATA_SD_HEAD_S-KUNAM, sy-vline,
  WA_VLCACTDATA_SD_HEAD_S-VDATU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VLCACTDATA_SD_HEAD_S you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_VLCACTDATA_SD_HEAD_S TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_VLCACTDATA_SD_HEAD_S INTO WA_VLCACTDATA_SD_HEAD_S.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit AUART, internal->external for field AUART
CALL FUNCTION 'CONVERSION_EXIT_AUART_OUTPUT'
  EXPORTING
    input =                      WA_VLCACTDATA_SD_HEAD_S-AUART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VLCACTDATA_SD_HEAD_S-AUART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VLCACTDATA_SD_HEAD_S-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VLCACTDATA_SD_HEAD_S-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRECEDING_DOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VLCACTDATA_SD_HEAD_S-PRECEDING_DOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VLCACTDATA_SD_HEAD_S-PRECEDING_DOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VLCACTDATA_SD_HEAD_S-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VLCACTDATA_SD_HEAD_S-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VLCACTDATA_SD_HEAD_S-LBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VLCACTDATA_SD_HEAD_S-LBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNWE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VLCACTDATA_SD_HEAD_S-KUNWE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VLCACTDATA_SD_HEAD_S-KUNWE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VLCACTDATA_SD_HEAD_S-FBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VLCACTDATA_SD_HEAD_S-FBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REVBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VLCACTDATA_SD_HEAD_S-REVBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VLCACTDATA_SD_HEAD_S-REVBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNRG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VLCACTDATA_SD_HEAD_S-KUNRG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VLCACTDATA_SD_HEAD_S-KUNRG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RQDEALER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VLCACTDATA_SD_HEAD_S-RQDEALER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VLCACTDATA_SD_HEAD_S-RQDEALER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DVDEALER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VLCACTDATA_SD_HEAD_S-DVDEALER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VLCACTDATA_SD_HEAD_S-DVDEALER.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_VLCACTDATA_SD_HEAD_S_STR, 
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
AUART TYPE STRING,
FKARA TYPE STRING,
VBELN TYPE STRING,
PRECEDING_DOC TYPE STRING,
PREC_DOC_POSNR TYPE STRING,
KUNNR TYPE STRING,
KUNAM TYPE STRING,
VDATU TYPE STRING,
BSTNK TYPE STRING,
BSTDK TYPE STRING,
ANGDT TYPE STRING,
BNDDT TYPE STRING,
LBELN TYPE STRING,
KUNWE TYPE STRING,
WENAM TYPE STRING,
LFDAT TYPE STRING,
FBELN TYPE STRING,
REVBELN TYPE STRING,
KUNRG TYPE STRING,
RGNAM TYPE STRING,
AUGRU TYPE STRING,
KSCHA TYPE STRING,
NETWR TYPE STRING,
WAERK TYPE STRING,
TRANSFERFLAG TYPE STRING,
RQDEALER TYPE STRING,
RQDEALNAM TYPE STRING,
DVDEALER TYPE STRING,
DVDEALNAM TYPE STRING,
VSART TYPE STRING,
ABGRU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VLCACTDATA_SD_HEAD_S_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_VLCACTDATA_SD_HEAD_S_STR-VKORG sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-VTWEG sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-SPART sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-AUART sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-FKARA sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-VBELN sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-PRECEDING_DOC sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-PREC_DOC_POSNR sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-KUNNR sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-KUNAM sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-VDATU sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-BSTNK sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-BSTDK sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-ANGDT sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-BNDDT sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-LBELN sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-KUNWE sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-WENAM sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-LFDAT sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-FBELN sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-REVBELN sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-KUNRG sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-RGNAM sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-AUGRU sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-KSCHA sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-NETWR sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-WAERK sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-TRANSFERFLAG sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-RQDEALER sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-RQDEALNAM sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-DVDEALER sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-DVDEALNAM sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-VSART sy-vline 
WA_VLCACTDATA_SD_HEAD_S_STR-ABGRU sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.