ABAP Select data from SAP table WRF_APC_MPA_BW_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_MPA_BW_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_MPA_BW_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_MPA_BW_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_MPA_BW_STY TYPE STANDARD TABLE OF WRF_APC_MPA_BW_STY,
      WA_WRF_APC_MPA_BW_STY TYPE WRF_APC_MPA_BW_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_MPA_BW_STY> TYPE WRF_APC_MPA_BW_STY.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WRF_APC_MPA_BW_STY
*  INTO TABLE @DATA(IT_WRF_APC_MPA_BW_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_MPA_BW_STY INDEX 1 INTO DATA(WA_WRF_APC_MPA_BW_STY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WRF_APC_MPA_BW_STY>-MANDT = 1.
<WRF_APC_MPA_BW_STY>-VKORG = 1.
<WRF_APC_MPA_BW_STY>-VTWEG = 1.
<WRF_APC_MPA_BW_STY>-MATNR = 1.
<WRF_APC_MPA_BW_STY>-COLOR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WRF_APC_MPA_BW_STY-SIZE1, sy-vline,
  WA_WRF_APC_MPA_BW_STY-SSMPROF, sy-vline,
  WA_WRF_APC_MPA_BW_STY-HIER_ID, sy-vline,
  WA_WRF_APC_MPA_BW_STY-CATEG, sy-vline,
  WA_WRF_APC_MPA_BW_STY-SAISO, sy-vline,
  WA_WRF_APC_MPA_BW_STY-SAISJ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WRF_APC_MPA_BW_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_MPA_BW_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_MPA_BW_STY INTO WA_WRF_APC_MPA_BW_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 MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WRF_APC_MPA_BW_STY-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_APC_MPA_BW_STY-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field SAISJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_WRF_APC_MPA_BW_STY-SAISJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_APC_MPA_BW_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_APC_MPA_BW_STY_STR, 
MANDT TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
MATNR TYPE STRING,
COLOR TYPE STRING,
SIZE1 TYPE STRING,
SSMPROF TYPE STRING,
HIER_ID TYPE STRING,
CATEG TYPE STRING,
SAISO TYPE STRING,
SAISJ TYPE STRING,
FASHGRD TYPE STRING,
RUNTIME TYPE STRING,
RELPER TYPE STRING,
DELFL TYPE STRING,
PLNFL TYPE STRING,
TIMESTAMP TYPE STRING,
CHANGED_BY TYPE STRING,
SSMSLPT TYPE STRING,
SSMTTIM TYPE STRING,
FSCYR_VAR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WRF_APC_MPA_BW_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_MPA_BW_STY_STR-MANDT sy-vline 
WA_WRF_APC_MPA_BW_STY_STR-VKORG sy-vline 
WA_WRF_APC_MPA_BW_STY_STR-VTWEG sy-vline 
WA_WRF_APC_MPA_BW_STY_STR-MATNR sy-vline 
WA_WRF_APC_MPA_BW_STY_STR-COLOR sy-vline 
WA_WRF_APC_MPA_BW_STY_STR-SIZE1 sy-vline 
WA_WRF_APC_MPA_BW_STY_STR-SSMPROF sy-vline 
WA_WRF_APC_MPA_BW_STY_STR-HIER_ID sy-vline 
WA_WRF_APC_MPA_BW_STY_STR-CATEG sy-vline 
WA_WRF_APC_MPA_BW_STY_STR-SAISO sy-vline 
WA_WRF_APC_MPA_BW_STY_STR-SAISJ sy-vline 
WA_WRF_APC_MPA_BW_STY_STR-FASHGRD sy-vline 
WA_WRF_APC_MPA_BW_STY_STR-RUNTIME sy-vline 
WA_WRF_APC_MPA_BW_STY_STR-RELPER sy-vline 
WA_WRF_APC_MPA_BW_STY_STR-DELFL sy-vline 
WA_WRF_APC_MPA_BW_STY_STR-PLNFL sy-vline 
WA_WRF_APC_MPA_BW_STY_STR-TIMESTAMP sy-vline 
WA_WRF_APC_MPA_BW_STY_STR-CHANGED_BY sy-vline 
WA_WRF_APC_MPA_BW_STY_STR-SSMSLPT sy-vline 
WA_WRF_APC_MPA_BW_STY_STR-SSMTTIM sy-vline 
WA_WRF_APC_MPA_BW_STY_STR-FSCYR_VAR sy-vline      INTO ld_text SEPARATED BY SPACE.

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