ABAP Select data from SAP table WRF_APC_PPA_ALVDATA_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_PPA_ALVDATA_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_PPA_ALVDATA_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_PPA_ALVDATA_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_PPA_ALVDATA_STY TYPE STANDARD TABLE OF WRF_APC_PPA_ALVDATA_STY,
      WA_WRF_APC_PPA_ALVDATA_STY TYPE WRF_APC_PPA_ALVDATA_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_PPA_ALVDATA_STY> TYPE WRF_APC_PPA_ALVDATA_STY.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WRF_APC_PPA_ALVDATA_STY
*  INTO TABLE @DATA(IT_WRF_APC_PPA_ALVDATA_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_PPA_ALVDATA_STY INDEX 1 INTO DATA(WA_WRF_APC_PPA_ALVDATA_STY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WRF_APC_PPA_ALVDATA_STY>-KFIGID = 1.
<WRF_APC_PPA_ALVDATA_STY>-KFIGDESC = 1.
<WRF_APC_PPA_ALVDATA_STY>-ASGN_LINE = 1.
<WRF_APC_PPA_ALVDATA_STY>-PPNR = 1.
<WRF_APC_PPA_ALVDATA_STY>-MAKTX = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WRF_APC_PPA_ALVDATA_STY-USG_STATUS, sy-vline,
  WA_WRF_APC_PPA_ALVDATA_STY-CALC_TOTAL, sy-vline,
  WA_WRF_APC_PPA_ALVDATA_STY-QTYASGNA_TOT, sy-vline,
  WA_WRF_APC_PPA_ALVDATA_STY-QTYASGNS01, sy-vline,
  WA_WRF_APC_PPA_ALVDATA_STY-QTYASGNA01, sy-vline,
  WA_WRF_APC_PPA_ALVDATA_STY-QTYASGNS02, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WRF_APC_PPA_ALVDATA_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_PPA_ALVDATA_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_PPA_ALVDATA_STY INTO WA_WRF_APC_PPA_ALVDATA_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 MATN1, internal->external for field PPNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WRF_APC_PPA_ALVDATA_STY-PPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_APC_PPA_ALVDATA_STY-PPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WRF_APC_PPA_ALVDATA_STY-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_APC_PPA_ALVDATA_STY-UNIT.
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_PPA_ALVDATA_STY_STR, 
KFIGID TYPE STRING,
KFIGDESC TYPE STRING,
ASGN_LINE TYPE STRING,
PPNR TYPE STRING,
MAKTX TYPE STRING,
USG_STATUS TYPE STRING,
CALC_TOTAL TYPE STRING,
QTYASGNA_TOT TYPE STRING,
QTYASGNS01 TYPE STRING,
QTYASGNA01 TYPE STRING,
QTYASGNS02 TYPE STRING,
QTYASGNA02 TYPE STRING,
QTYASGNS03 TYPE STRING,
QTYASGNA03 TYPE STRING,
QTYASGNS04 TYPE STRING,
QTYASGNA04 TYPE STRING,
QTYASGNS05 TYPE STRING,
QTYASGNA05 TYPE STRING,
QTYASGNS06 TYPE STRING,
QTYASGNA06 TYPE STRING,
QTYASGNS07 TYPE STRING,
QTYASGNA07 TYPE STRING,
QTYASGNS08 TYPE STRING,
QTYASGNA08 TYPE STRING,
QTYASGNS09 TYPE STRING,
QTYASGNA09 TYPE STRING,
QTYASGNS10 TYPE STRING,
QTYASGNA10 TYPE STRING,
QTYASGNS11 TYPE STRING,
QTYASGNA11 TYPE STRING,
QTYASGNS12 TYPE STRING,
QTYASGNA12 TYPE STRING,
QTYASGNS13 TYPE STRING,
QTYASGNA13 TYPE STRING,
QTYASGNS14 TYPE STRING,
QTYASGNA14 TYPE STRING,
QTYASGNS15 TYPE STRING,
QTYASGNA15 TYPE STRING,
QTYASGNS16 TYPE STRING,
QTYASGNA16 TYPE STRING,
QTYASGNS17 TYPE STRING,
QTYASGNA17 TYPE STRING,
QTYASGNS18 TYPE STRING,
QTYASGNA18 TYPE STRING,
QTYASGNS19 TYPE STRING,
QTYASGNA19 TYPE STRING,
QTYASGNS20 TYPE STRING,
QTYASGNA20 TYPE STRING,
UNIT TYPE STRING,
T_STYL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WRF_APC_PPA_ALVDATA_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_PPA_ALVDATA_STY_STR-KFIGID sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-KFIGDESC sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-ASGN_LINE sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-PPNR sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-MAKTX sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-USG_STATUS sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-CALC_TOTAL sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNA_TOT sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNS01 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNA01 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNS02 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNA02 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNS03 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNA03 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNS04 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNA04 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNS05 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNA05 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNS06 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNA06 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNS07 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNA07 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNS08 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNA08 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNS09 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNA09 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNS10 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNA10 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNS11 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNA11 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNS12 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNA12 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNS13 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNA13 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNS14 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNA14 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNS15 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNA15 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNS16 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNA16 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNS17 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNA17 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNS18 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNA18 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNS19 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNA19 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNS20 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-QTYASGNA20 sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-UNIT sy-vline 
WA_WRF_APC_PPA_ALVDATA_STY_STR-T_STYL sy-vline      INTO ld_text SEPARATED BY SPACE.

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