ABAP Select data from SAP table WRF_APC_PL_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_PL_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_PL_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_PL_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_PL_ALVDATA_STY TYPE STANDARD TABLE OF WRF_APC_PL_ALVDATA_STY,
      WA_WRF_APC_PL_ALVDATA_STY TYPE WRF_APC_PL_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_PL_ALVDATA_STY> TYPE WRF_APC_PL_ALVDATA_STY.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WRF_APC_PL_ALVDATA_STY
*  INTO TABLE @DATA(IT_WRF_APC_PL_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_PL_ALVDATA_STY INDEX 1 INTO DATA(WA_WRF_APC_PL_ALVDATA_STY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WRF_APC_PL_ALVDATA_STY>-LINE = 1.
<WRF_APC_PL_ALVDATA_STY>-EXPANDED = 1.
<WRF_APC_PL_ALVDATA_STY>-FILTER_INDICATOR = 1.
<WRF_APC_PL_ALVDATA_STY>-PL_ROW = 1.
<WRF_APC_PL_ALVDATA_STY>-STATUS = 1.

ENDLOOP.

LOOP AT IT_WRF_APC_PL_ALVDATA_STY INTO WA_WRF_APC_PL_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_PL_ALVDATA_STY-DELTO_STATUS, sy-vline,
  WA_WRF_APC_PL_ALVDATA_STY-DELTO_VALUE, sy-vline,
  WA_WRF_APC_PL_ALVDATA_STY-HAS_PREPACK, sy-vline,
  WA_WRF_APC_PL_ALVDATA_STY-PLITEM, sy-vline,
  WA_WRF_APC_PL_ALVDATA_STY-LFDAT, sy-vline,
  WA_WRF_APC_PL_ALVDATA_STY-SKEY_STATUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WRF_APC_PL_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_PL_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_PL_ALVDATA_STY INTO WA_WRF_APC_PL_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 SKEY_MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WRF_APC_PL_ALVDATA_STY-SKEY_MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_APC_PL_ALVDATA_STY-SKEY_MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field COMPID
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WRF_APC_PL_ALVDATA_STY-COMPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_APC_PL_ALVDATA_STY-COMPID.
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_PL_ALVDATA_STY_STR, 
LINE TYPE STRING,
EXPANDED TYPE STRING,
FILTER_INDICATOR TYPE STRING,
PL_ROW TYPE STRING,
STATUS TYPE STRING,
DELTO_STATUS TYPE STRING,
DELTO_VALUE TYPE STRING,
HAS_PREPACK TYPE STRING,
PLITEM TYPE STRING,
LFDAT TYPE STRING,
SKEY_STATUS TYPE STRING,
SKEY_DELTO_STATUS TYPE STRING,
SKEY_DELTO_VALUE TYPE STRING,
SKEY_MATNR TYPE STRING,
SKEY_LFDAT TYPE STRING,
SKEY_DESC TYPE STRING,
SKEY_HAS_PREPACK TYPE STRING,
SKEY_CHAR1 TYPE STRING,
SKEY_CHAR2 TYPE STRING,
ARTNAME TYPE STRING,
ARTDESC TYPE STRING,
COMPID TYPE STRING,
COMPDESC TYPE STRING,
CHAR1 TYPE STRING,
ATWRT1 TYPE STRING,
CHAR2 TYPE STRING,
ATWRT2 TYPE STRING,
CHAR3 TYPE STRING,
ATWRT3 TYPE STRING,
STYLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WRF_APC_PL_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_PL_ALVDATA_STY_STR-LINE sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-EXPANDED sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-FILTER_INDICATOR sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-PL_ROW sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-STATUS sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-DELTO_STATUS sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-DELTO_VALUE sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-HAS_PREPACK sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-PLITEM sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-LFDAT sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-SKEY_STATUS sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-SKEY_DELTO_STATUS sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-SKEY_DELTO_VALUE sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-SKEY_MATNR sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-SKEY_LFDAT sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-SKEY_DESC sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-SKEY_HAS_PREPACK sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-SKEY_CHAR1 sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-SKEY_CHAR2 sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-ARTNAME sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-ARTDESC sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-COMPID sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-COMPDESC sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-CHAR1 sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-ATWRT1 sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-CHAR2 sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-ATWRT2 sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-CHAR3 sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-ATWRT3 sy-vline 
WA_WRF_APC_PL_ALVDATA_STY_STR-STYLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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