ABAP Select data from SAP table E2AFPOL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E2AFPOL 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 E2AFPOL. 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 E2AFPOL 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_E2AFPOL TYPE STANDARD TABLE OF E2AFPOL,
      WA_E2AFPOL TYPE E2AFPOL,
      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: <E2AFPOL> TYPE E2AFPOL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E2AFPOL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E2AFPOL
  INTO TABLE IT_E2AFPOL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E2AFPOL
*  INTO TABLE @DATA(IT_E2AFPOL2).
*--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_E2AFPOL INDEX 1 INTO DATA(WA_E2AFPOL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E2AFPOL ASSIGNING <E2AFPOL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E2AFPOL>-POSNR = 1.
<E2AFPOL>-AMEIN = 1.
<E2AFPOL>-BMENG = 1.
<E2AFPOL>-DFREI = 1.
<E2AFPOL>-KDAUF = 1.

ENDLOOP.

LOOP AT IT_E2AFPOL INTO WA_E2AFPOL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E2AFPOL-KDEIN, sy-vline,
  WA_E2AFPOL-KDPOS, sy-vline,
  WA_E2AFPOL-LGORT, sy-vline,
  WA_E2AFPOL-MATNR, sy-vline,
  WA_E2AFPOL-MEINS, sy-vline,
  WA_E2AFPOL-PLNUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E2AFPOL 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_E2AFPOL 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_E2AFPOL INTO WA_E2AFPOL.


*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 KDAUF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2AFPOL-KDAUF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2AFPOL-KDAUF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_E2AFPOL-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2AFPOL-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2AFPOL-PLNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2AFPOL-PLNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SAFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2AFPOL-SAFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2AFPOL-SAFNR.
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_E2AFPOL_STR, 
POSNR TYPE STRING,
AMEIN TYPE STRING,
BMENG TYPE STRING,
DFREI TYPE STRING,
KDAUF TYPE STRING,
KDEIN TYPE STRING,
KDPOS TYPE STRING,
LGORT TYPE STRING,
MATNR TYPE STRING,
MEINS TYPE STRING,
PLNUM TYPE STRING,
PSAMG TYPE STRING,
PSMNG TYPE STRING,
SAFNR TYPE STRING,
SERNR TYPE STRING,
UMREN TYPE STRING,
UMREZ TYPE STRING,
VERID TYPE STRING,
WEBAZ TYPE STRING,
WEMNG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E2AFPOL_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_E2AFPOL_STR-POSNR sy-vline 
WA_E2AFPOL_STR-AMEIN sy-vline 
WA_E2AFPOL_STR-BMENG sy-vline 
WA_E2AFPOL_STR-DFREI sy-vline 
WA_E2AFPOL_STR-KDAUF sy-vline 
WA_E2AFPOL_STR-KDEIN sy-vline 
WA_E2AFPOL_STR-KDPOS sy-vline 
WA_E2AFPOL_STR-LGORT sy-vline 
WA_E2AFPOL_STR-MATNR sy-vline 
WA_E2AFPOL_STR-MEINS sy-vline 
WA_E2AFPOL_STR-PLNUM sy-vline 
WA_E2AFPOL_STR-PSAMG sy-vline 
WA_E2AFPOL_STR-PSMNG sy-vline 
WA_E2AFPOL_STR-SAFNR sy-vline 
WA_E2AFPOL_STR-SERNR sy-vline 
WA_E2AFPOL_STR-UMREN sy-vline 
WA_E2AFPOL_STR-UMREZ sy-vline 
WA_E2AFPOL_STR-VERID sy-vline 
WA_E2AFPOL_STR-WEBAZ sy-vline 
WA_E2AFPOL_STR-WEMNG sy-vline      INTO ld_text SEPARATED BY SPACE.

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