ABAP Select data from SAP table WRF_APC_CHAR_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_APC_CHAR_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_APC_CHAR_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_APC_CHAR_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_APC_CHAR_STY TYPE STANDARD TABLE OF WRF_APC_CHAR_STY,
      WA_WRF_APC_CHAR_STY TYPE WRF_APC_CHAR_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_APC_CHAR_STY> TYPE WRF_APC_CHAR_STY.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WRF_APC_CHAR_STY
*  INTO TABLE @DATA(IT_WRF_APC_CHAR_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_APC_CHAR_STY INDEX 1 INTO DATA(WA_WRF_APC_CHAR_STY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WRF_APC_CHAR_STY>-ATINN = 1.
<WRF_APC_CHAR_STY>-ATNAM = 1.
<WRF_APC_CHAR_STY>-ATBEZ = 1.
<WRF_APC_CHAR_STY>-CLINT = 1.
<WRF_APC_CHAR_STY>-ATFOR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WRF_APC_CHAR_STY-ANZST, sy-vline,
  WA_WRF_APC_CHAR_STY-ANZDZ, sy-vline,
  WA_WRF_APC_CHAR_STY-ATVOR, sy-vline,
  WA_WRF_APC_CHAR_STY-ATDIM, sy-vline,
  WA_WRF_APC_CHAR_STY-ATDEX, sy-vline,
  WA_WRF_APC_CHAR_STY-ATKLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WRF_APC_CHAR_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_APC_CHAR_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_APC_CHAR_STY INTO WA_WRF_APC_CHAR_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 ATINN, internal->external for field ATINN
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_WRF_APC_CHAR_STY-ATINN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_APC_CHAR_STY-ATINN.
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_APC_CHAR_STY_STR, 
ATINN TYPE STRING,
ATNAM TYPE STRING,
ATBEZ TYPE STRING,
CLINT TYPE STRING,
ATFOR TYPE STRING,
ANZST TYPE STRING,
ANZDZ TYPE STRING,
ATVOR TYPE STRING,
ATDIM TYPE STRING,
ATDEX TYPE STRING,
ATKLE TYPE STRING,
ATSCH TYPE STRING,
ATVSC TYPE STRING,
ATEIN TYPE STRING,
ATTAB TYPE STRING,
ATFEL TYPE STRING,
ATTEI TYPE STRING,
ATPRT TYPE STRING,
ATPRR TYPE STRING,
ATPRF TYPE STRING,
ATSON TYPE STRING,
FLREQ TYPE STRING,
FLINH TYPE STRING,
FLASS TYPE STRING,
RELEV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WRF_APC_CHAR_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_APC_CHAR_STY_STR-ATINN sy-vline 
WA_WRF_APC_CHAR_STY_STR-ATNAM sy-vline 
WA_WRF_APC_CHAR_STY_STR-ATBEZ sy-vline 
WA_WRF_APC_CHAR_STY_STR-CLINT sy-vline 
WA_WRF_APC_CHAR_STY_STR-ATFOR sy-vline 
WA_WRF_APC_CHAR_STY_STR-ANZST sy-vline 
WA_WRF_APC_CHAR_STY_STR-ANZDZ sy-vline 
WA_WRF_APC_CHAR_STY_STR-ATVOR sy-vline 
WA_WRF_APC_CHAR_STY_STR-ATDIM sy-vline 
WA_WRF_APC_CHAR_STY_STR-ATDEX sy-vline 
WA_WRF_APC_CHAR_STY_STR-ATKLE sy-vline 
WA_WRF_APC_CHAR_STY_STR-ATSCH sy-vline 
WA_WRF_APC_CHAR_STY_STR-ATVSC sy-vline 
WA_WRF_APC_CHAR_STY_STR-ATEIN sy-vline 
WA_WRF_APC_CHAR_STY_STR-ATTAB sy-vline 
WA_WRF_APC_CHAR_STY_STR-ATFEL sy-vline 
WA_WRF_APC_CHAR_STY_STR-ATTEI sy-vline 
WA_WRF_APC_CHAR_STY_STR-ATPRT sy-vline 
WA_WRF_APC_CHAR_STY_STR-ATPRR sy-vline 
WA_WRF_APC_CHAR_STY_STR-ATPRF sy-vline 
WA_WRF_APC_CHAR_STY_STR-ATSON sy-vline 
WA_WRF_APC_CHAR_STY_STR-FLREQ sy-vline 
WA_WRF_APC_CHAR_STY_STR-FLINH sy-vline 
WA_WRF_APC_CHAR_STY_STR-FLASS sy-vline 
WA_WRF_APC_CHAR_STY_STR-RELEV sy-vline      INTO ld_text SEPARATED BY SPACE.

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