ABAP Select data from SAP table E1RDOCU into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E1RDOCU 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 E1RDOCU. 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 E1RDOCU 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_E1RDOCU TYPE STANDARD TABLE OF E1RDOCU,
      WA_E1RDOCU TYPE E1RDOCU,
      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: <E1RDOCU> TYPE E1RDOCU.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E1RDOCU.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E1RDOCU
  INTO TABLE IT_E1RDOCU.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E1RDOCU
*  INTO TABLE @DATA(IT_E1RDOCU2).
*--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_E1RDOCU INDEX 1 INTO DATA(WA_E1RDOCU2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E1RDOCU ASSIGNING <E1RDOCU>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E1RDOCU>-KONNR = 1.
<E1RDOCU>-KTPNR = 1.
<E1RDOCU>-EBELN = 1.
<E1RDOCU>-EBELP = 1.
<E1RDOCU>-BEDAT = 1.

ENDLOOP.

LOOP AT IT_E1RDOCU INTO WA_E1RDOCU.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E1RDOCU-MENGE, sy-vline,
  WA_E1RDOCU-MEINS, sy-vline,
  WA_E1RDOCU-NETWR, sy-vline,
  WA_E1RDOCU-WAERS, sy-vline,
  WA_E1RDOCU-WKURS, sy-vline,
  WA_E1RDOCU-LOEKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E1RDOCU 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_E1RDOCU 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_E1RDOCU INTO WA_E1RDOCU.


*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 KONNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E1RDOCU-KONNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E1RDOCU-KONNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E1RDOCU-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E1RDOCU-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGSY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E1RDOCU-LOGSY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E1RDOCU-LOGSY.
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_E1RDOCU_STR, 
KONNR TYPE STRING,
KTPNR TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
BEDAT TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
NETWR TYPE STRING,
WAERS TYPE STRING,
WKURS TYPE STRING,
LOEKZ TYPE STRING,
LOGSY TYPE STRING,
PLOEK TYPE STRING,
WEPOS TYPE STRING,
REPOS TYPE STRING,
WEMNG TYPE STRING,
REMNG TYPE STRING,
BUKRS TYPE STRING,
WERKS TYPE STRING,
EKORG TYPE STRING,
BSTYP TYPE STRING,
WKURS_M TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E1RDOCU_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_E1RDOCU_STR-KONNR sy-vline 
WA_E1RDOCU_STR-KTPNR sy-vline 
WA_E1RDOCU_STR-EBELN sy-vline 
WA_E1RDOCU_STR-EBELP sy-vline 
WA_E1RDOCU_STR-BEDAT sy-vline 
WA_E1RDOCU_STR-MENGE sy-vline 
WA_E1RDOCU_STR-MEINS sy-vline 
WA_E1RDOCU_STR-NETWR sy-vline 
WA_E1RDOCU_STR-WAERS sy-vline 
WA_E1RDOCU_STR-WKURS sy-vline 
WA_E1RDOCU_STR-LOEKZ sy-vline 
WA_E1RDOCU_STR-LOGSY sy-vline 
WA_E1RDOCU_STR-PLOEK sy-vline 
WA_E1RDOCU_STR-WEPOS sy-vline 
WA_E1RDOCU_STR-REPOS sy-vline 
WA_E1RDOCU_STR-WEMNG sy-vline 
WA_E1RDOCU_STR-REMNG sy-vline 
WA_E1RDOCU_STR-BUKRS sy-vline 
WA_E1RDOCU_STR-WERKS sy-vline 
WA_E1RDOCU_STR-EKORG sy-vline 
WA_E1RDOCU_STR-BSTYP sy-vline 
WA_E1RDOCU_STR-WKURS_M sy-vline      INTO ld_text SEPARATED BY SPACE.

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