ABAP Select data from SAP table WRF_DISCONT_ERR 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_ERR 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_ERR. 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_ERR 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_ERR TYPE STANDARD TABLE OF WRF_DISCONT_ERR,
      WA_WRF_DISCONT_ERR TYPE WRF_DISCONT_ERR,
      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_ERR> TYPE WRF_DISCONT_ERR.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WRF_DISCONT_ERR
*  INTO TABLE @DATA(IT_WRF_DISCONT_ERR2).
*--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_ERR INDEX 1 INTO DATA(WA_WRF_DISCONT_ERR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WRF_DISCONT_ERR>-MANDT = 1.
<WRF_DISCONT_ERR>-DISNR = 1.
<WRF_DISCONT_ERR>-POSNR = 1.
<WRF_DISCONT_ERR>-UPOSN = 1.
<WRF_DISCONT_ERR>-MATNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WRF_DISCONT_ERR-LIFNR, sy-vline,
  WA_WRF_DISCONT_ERR-EKORG, sy-vline,
  WA_WRF_DISCONT_ERR-WERKS, sy-vline,
  WA_WRF_DISCONT_ERR-LOCNR, sy-vline,
  WA_WRF_DISCONT_ERR-VKORG, sy-vline,
  WA_WRF_DISCONT_ERR-VTWEG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WRF_DISCONT_ERR 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_ERR 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_ERR INTO WA_WRF_DISCONT_ERR.


*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_ERR-DISNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_DISCONT_ERR-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_ERR-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_DISCONT_ERR-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_ERR-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_DISCONT_ERR-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_ERR-LOCNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_DISCONT_ERR-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_ERR-INFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_DISCONT_ERR-INFNR.
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_ERR_STR, 
MANDT TYPE STRING,
DISNR TYPE STRING,
POSNR TYPE STRING,
UPOSN TYPE STRING,
MATNR TYPE STRING,
LIFNR TYPE STRING,
EKORG TYPE STRING,
WERKS TYPE STRING,
LOCNR TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
INFNR TYPE STRING,
LGORT TYPE STRING,
LGNUM TYPE STRING,
BWTAR TYPE STRING,
MSGTY TYPE STRING,
TABNA TYPE STRING,
TABKEY TYPE STRING,
ARBGB TYPE STRING,
MSGNR TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
VERFA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WRF_DISCONT_ERR_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_ERR_STR-MANDT sy-vline 
WA_WRF_DISCONT_ERR_STR-DISNR sy-vline 
WA_WRF_DISCONT_ERR_STR-POSNR sy-vline 
WA_WRF_DISCONT_ERR_STR-UPOSN sy-vline 
WA_WRF_DISCONT_ERR_STR-MATNR sy-vline 
WA_WRF_DISCONT_ERR_STR-LIFNR sy-vline 
WA_WRF_DISCONT_ERR_STR-EKORG sy-vline 
WA_WRF_DISCONT_ERR_STR-WERKS sy-vline 
WA_WRF_DISCONT_ERR_STR-LOCNR sy-vline 
WA_WRF_DISCONT_ERR_STR-VKORG sy-vline 
WA_WRF_DISCONT_ERR_STR-VTWEG sy-vline 
WA_WRF_DISCONT_ERR_STR-INFNR sy-vline 
WA_WRF_DISCONT_ERR_STR-LGORT sy-vline 
WA_WRF_DISCONT_ERR_STR-LGNUM sy-vline 
WA_WRF_DISCONT_ERR_STR-BWTAR sy-vline 
WA_WRF_DISCONT_ERR_STR-MSGTY sy-vline 
WA_WRF_DISCONT_ERR_STR-TABNA sy-vline 
WA_WRF_DISCONT_ERR_STR-TABKEY sy-vline 
WA_WRF_DISCONT_ERR_STR-ARBGB sy-vline 
WA_WRF_DISCONT_ERR_STR-MSGNR sy-vline 
WA_WRF_DISCONT_ERR_STR-MSGV1 sy-vline 
WA_WRF_DISCONT_ERR_STR-MSGV2 sy-vline 
WA_WRF_DISCONT_ERR_STR-MSGV3 sy-vline 
WA_WRF_DISCONT_ERR_STR-MSGV4 sy-vline 
WA_WRF_DISCONT_ERR_STR-VERFA sy-vline      INTO ld_text SEPARATED BY SPACE.

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