ABAP Select data from SAP table V_PEG_EKPO2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_PEG_EKPO2 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 V_PEG_EKPO2. 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 V_PEG_EKPO2 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_V_PEG_EKPO2 TYPE STANDARD TABLE OF V_PEG_EKPO2,
      WA_V_PEG_EKPO2 TYPE V_PEG_EKPO2,
      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: <V_PEG_EKPO2> TYPE V_PEG_EKPO2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_PEG_EKPO2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_PEG_EKPO2
  INTO TABLE IT_V_PEG_EKPO2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_PEG_EKPO2
*  INTO TABLE @DATA(IT_V_PEG_EKPO22).
*--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_V_PEG_EKPO2 INDEX 1 INTO DATA(WA_V_PEG_EKPO22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_PEG_EKPO2 ASSIGNING <V_PEG_EKPO2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_PEG_EKPO2>-MANDT = 1.
<V_PEG_EKPO2>-EBELN = 1.
<V_PEG_EKPO2>-EBELP = 1.
<V_PEG_EKPO2>-ZEKKN = 1.
<V_PEG_EKPO2>-MATNR = 1.

ENDLOOP.

LOOP AT IT_V_PEG_EKPO2 INTO WA_V_PEG_EKPO2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_PEG_EKPO2-WERKS, sy-vline,
  WA_V_PEG_EKPO2-UMREZ, sy-vline,
  WA_V_PEG_EKPO2-UMREN, sy-vline,
  WA_V_PEG_EKPO2-LMEIN, sy-vline,
  WA_V_PEG_EKPO2-ELIKZ, sy-vline,
  WA_V_PEG_EKPO2-MENGE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_PEG_EKPO2 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_V_PEG_EKPO2 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_V_PEG_EKPO2 INTO WA_V_PEG_EKPO2.


*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 EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_PEG_EKPO2-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_PEG_EKPO2-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_V_PEG_EKPO2-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_PEG_EKPO2-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field LMEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_V_PEG_EKPO2-LMEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_PEG_EKPO2-LMEIN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_V_PEG_EKPO2-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_PEG_EKPO2-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PS_PSP_PNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_V_PEG_EKPO2-PS_PSP_PNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_PEG_EKPO2-PS_PSP_PNR.
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_V_PEG_EKPO2_STR, 
MANDT TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
ZEKKN TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
LMEIN TYPE STRING,
ELIKZ TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
PS_PSP_PNR TYPE STRING,
RESWK TYPE STRING,
WEBAZ TYPE STRING,
PSTYP TYPE STRING,
LOEKZ TYPE STRING,
LOEKZ_EKKN TYPE STRING,
BSTYP TYPE STRING,
SOBKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_PEG_EKPO2_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_V_PEG_EKPO2_STR-MANDT sy-vline 
WA_V_PEG_EKPO2_STR-EBELN sy-vline 
WA_V_PEG_EKPO2_STR-EBELP sy-vline 
WA_V_PEG_EKPO2_STR-ZEKKN sy-vline 
WA_V_PEG_EKPO2_STR-MATNR sy-vline 
WA_V_PEG_EKPO2_STR-WERKS sy-vline 
WA_V_PEG_EKPO2_STR-UMREZ sy-vline 
WA_V_PEG_EKPO2_STR-UMREN sy-vline 
WA_V_PEG_EKPO2_STR-LMEIN sy-vline 
WA_V_PEG_EKPO2_STR-ELIKZ sy-vline 
WA_V_PEG_EKPO2_STR-MENGE sy-vline 
WA_V_PEG_EKPO2_STR-MEINS sy-vline 
WA_V_PEG_EKPO2_STR-PS_PSP_PNR sy-vline 
WA_V_PEG_EKPO2_STR-RESWK sy-vline 
WA_V_PEG_EKPO2_STR-WEBAZ sy-vline 
WA_V_PEG_EKPO2_STR-PSTYP sy-vline 
WA_V_PEG_EKPO2_STR-LOEKZ sy-vline 
WA_V_PEG_EKPO2_STR-LOEKZ_EKKN sy-vline 
WA_V_PEG_EKPO2_STR-BSTYP sy-vline 
WA_V_PEG_EKPO2_STR-SOBKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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