ABAP Select data from SAP table WRF_DISCONT_POS_ALV_STY into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WRF_DISCONT_POS_ALV_STY 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 WRF_DISCONT_POS_ALV_STY. 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 WRF_DISCONT_POS_ALV_STY 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_WRF_DISCONT_POS_ALV_STY TYPE STANDARD TABLE OF WRF_DISCONT_POS_ALV_STY,
      WA_WRF_DISCONT_POS_ALV_STY TYPE WRF_DISCONT_POS_ALV_STY,
      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: <WRF_DISCONT_POS_ALV_STY> TYPE WRF_DISCONT_POS_ALV_STY.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WRF_DISCONT_POS_ALV_STY
*  INTO TABLE @DATA(IT_WRF_DISCONT_POS_ALV_STY2).
*--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_WRF_DISCONT_POS_ALV_STY INDEX 1 INTO DATA(WA_WRF_DISCONT_POS_ALV_STY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WRF_DISCONT_POS_ALV_STY>-SELKZ = 1.
<WRF_DISCONT_POS_ALV_STY>-LIGHTS = 1.
<WRF_DISCONT_POS_ALV_STY>-MANDT = 1.
<WRF_DISCONT_POS_ALV_STY>-DISNR = 1.
<WRF_DISCONT_POS_ALV_STY>-POSNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WRF_DISCONT_POS_ALV_STY-MATNR, sy-vline,
  WA_WRF_DISCONT_POS_ALV_STY-LIFNR, sy-vline,
  WA_WRF_DISCONT_POS_ALV_STY-EKORG, sy-vline,
  WA_WRF_DISCONT_POS_ALV_STY-WERKS, sy-vline,
  WA_WRF_DISCONT_POS_ALV_STY-LOCNR, sy-vline,
  WA_WRF_DISCONT_POS_ALV_STY-INFNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WRF_DISCONT_POS_ALV_STY 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_WRF_DISCONT_POS_ALV_STY 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_WRF_DISCONT_POS_ALV_STY INTO WA_WRF_DISCONT_POS_ALV_STY.


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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WRF_DISCONT_POS_ALV_STY-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_DISCONT_POS_ALV_STY-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit MATN1, internal->external for field SATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WRF_DISCONT_POS_ALV_STY-SATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_DISCONT_POS_ALV_STY-SATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field SAISJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_WRF_DISCONT_POS_ALV_STY-SAISJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_DISCONT_POS_ALV_STY-SAISJ.
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_WRF_DISCONT_POS_ALV_STY_STR, 
SELKZ TYPE STRING,
LIGHTS TYPE STRING,
MANDT TYPE STRING,
DISNR TYPE STRING,
POSNR TYPE STRING,
MATNR TYPE STRING,
LIFNR TYPE STRING,
EKORG TYPE STRING,
WERKS TYPE STRING,
LOCNR TYPE STRING,
INFNR TYPE STRING,
MTART TYPE STRING,
MATKL TYPE STRING,
MMSTA TYPE STRING,
ATTYP TYPE STRING,
MSTAV TYPE STRING,
MSTAE TYPE STRING,
SATNR TYPE STRING,
SAISO TYPE STRING,
SAISJ TYPE STRING,
SAITY TYPE STRING,
ALDAT TYPE STRING,
BSPER TYPE STRING,
VSPER TYPE STRING,
KZKORREKT TYPE STRING,
KZSPERR TYPE STRING,
DISSTA TYPE STRING,
FSH_SEASON_YEAR TYPE STRING,
FSH_SEASON TYPE STRING,
FSH_COLLECTION TYPE STRING,
FSH_THEME TYPE STRING,
MULT_SEAS_ASSIGN TYPE STRING,
MAKTX TYPE STRING,
HIDE TYPE STRING,
SPERRE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WRF_DISCONT_POS_ALV_STY_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_WRF_DISCONT_POS_ALV_STY_STR-SELKZ sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-LIGHTS sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-MANDT sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-DISNR sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-POSNR sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-MATNR sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-LIFNR sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-EKORG sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-WERKS sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-LOCNR sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-INFNR sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-MTART sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-MATKL sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-MMSTA sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-ATTYP sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-MSTAV sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-MSTAE sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-SATNR sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-SAISO sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-SAISJ sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-SAITY sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-ALDAT sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-BSPER sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-VSPER sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-KZKORREKT sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-KZSPERR sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-DISSTA sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-FSH_SEASON_YEAR sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-FSH_SEASON sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-FSH_COLLECTION sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-FSH_THEME sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-MULT_SEAS_ASSIGN sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-MAKTX sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-HIDE sy-vline 
WA_WRF_DISCONT_POS_ALV_STY_STR-SPERRE sy-vline      INTO ld_text SEPARATED BY SPACE.

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