ABAP Select data from SAP table E2EDL20 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E2EDL20 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 E2EDL20. 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 E2EDL20 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_E2EDL20 TYPE STANDARD TABLE OF E2EDL20,
      WA_E2EDL20 TYPE E2EDL20,
      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: <E2EDL20> TYPE E2EDL20.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E2EDL20.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E2EDL20
  INTO TABLE IT_E2EDL20.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E2EDL20
*  INTO TABLE @DATA(IT_E2EDL202).
*--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_E2EDL20 INDEX 1 INTO DATA(WA_E2EDL202).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E2EDL20 ASSIGNING <E2EDL20>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E2EDL20>-VBELN = 1.
<E2EDL20>-VSTEL = 1.
<E2EDL20>-VKORG = 1.
<E2EDL20>-LSTEL = 1.
<E2EDL20>-VKBUR = 1.

ENDLOOP.

LOOP AT IT_E2EDL20 INTO WA_E2EDL20.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E2EDL20-LGNUM, sy-vline,
  WA_E2EDL20-ABLAD, sy-vline,
  WA_E2EDL20-INCO1, sy-vline,
  WA_E2EDL20-INCO2, sy-vline,
  WA_E2EDL20-ROUTE, sy-vline,
  WA_E2EDL20-VSBED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E2EDL20 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_E2EDL20 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_E2EDL20 INTO WA_E2EDL20.


*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 VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2EDL20-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2EDL20-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field XABLN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2EDL20-XABLN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2EDL20-XABLN.
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_E2EDL20_STR, 
VBELN TYPE STRING,
VSTEL TYPE STRING,
VKORG TYPE STRING,
LSTEL TYPE STRING,
VKBUR TYPE STRING,
LGNUM TYPE STRING,
ABLAD TYPE STRING,
INCO1 TYPE STRING,
INCO2 TYPE STRING,
ROUTE TYPE STRING,
VSBED TYPE STRING,
BTGEW TYPE STRING,
NTGEW TYPE STRING,
GEWEI TYPE STRING,
VOLUM TYPE STRING,
VOLEH TYPE STRING,
ANZPK TYPE STRING,
BOLNR TYPE STRING,
TRATY TYPE STRING,
TRAID TYPE STRING,
XABLN TYPE STRING,
LIFEX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E2EDL20_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_E2EDL20_STR-VBELN sy-vline 
WA_E2EDL20_STR-VSTEL sy-vline 
WA_E2EDL20_STR-VKORG sy-vline 
WA_E2EDL20_STR-LSTEL sy-vline 
WA_E2EDL20_STR-VKBUR sy-vline 
WA_E2EDL20_STR-LGNUM sy-vline 
WA_E2EDL20_STR-ABLAD sy-vline 
WA_E2EDL20_STR-INCO1 sy-vline 
WA_E2EDL20_STR-INCO2 sy-vline 
WA_E2EDL20_STR-ROUTE sy-vline 
WA_E2EDL20_STR-VSBED sy-vline 
WA_E2EDL20_STR-BTGEW sy-vline 
WA_E2EDL20_STR-NTGEW sy-vline 
WA_E2EDL20_STR-GEWEI sy-vline 
WA_E2EDL20_STR-VOLUM sy-vline 
WA_E2EDL20_STR-VOLEH sy-vline 
WA_E2EDL20_STR-ANZPK sy-vline 
WA_E2EDL20_STR-BOLNR sy-vline 
WA_E2EDL20_STR-TRATY sy-vline 
WA_E2EDL20_STR-TRAID sy-vline 
WA_E2EDL20_STR-XABLN sy-vline 
WA_E2EDL20_STR-LIFEX sy-vline      INTO ld_text SEPARATED BY SPACE.

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