ABAP Select data from SAP table E2FIHDR into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E2FIHDR 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 E2FIHDR. 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 E2FIHDR 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_E2FIHDR TYPE STANDARD TABLE OF E2FIHDR,
      WA_E2FIHDR TYPE E2FIHDR,
      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: <E2FIHDR> TYPE E2FIHDR.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E2FIHDR.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E2FIHDR
  INTO TABLE IT_E2FIHDR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E2FIHDR
*  INTO TABLE @DATA(IT_E2FIHDR2).
*--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_E2FIHDR INDEX 1 INTO DATA(WA_E2FIHDR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E2FIHDR ASSIGNING <E2FIHDR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E2FIHDR>-BUKRS = 1.
<E2FIHDR>-BELNR = 1.
<E2FIHDR>-GJAHR = 1.
<E2FIHDR>-BLART = 1.
<E2FIHDR>-BLDAT = 1.

ENDLOOP.

LOOP AT IT_E2FIHDR INTO WA_E2FIHDR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E2FIHDR-BUDAT, sy-vline,
  WA_E2FIHDR-MONAT, sy-vline,
  WA_E2FIHDR-WWERT, sy-vline,
  WA_E2FIHDR-XBLNR, sy-vline,
  WA_E2FIHDR-BKTXT, sy-vline,
  WA_E2FIHDR-WAERS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E2FIHDR 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_E2FIHDR 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_E2FIHDR INTO WA_E2FIHDR.


*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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2FIHDR-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2FIHDR-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AWSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2FIHDR-AWSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2FIHDR-AWSYS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AWREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2FIHDR-AWREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2FIHDR-AWREF.
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_E2FIHDR_STR, 
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BLART TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
MONAT TYPE STRING,
WWERT TYPE STRING,
XBLNR TYPE STRING,
BKTXT TYPE STRING,
WAERS TYPE STRING,
KURSF TYPE STRING,
KURS2 TYPE STRING,
KURS3 TYPE STRING,
AWSYS TYPE STRING,
AWTYP TYPE STRING,
AWREF TYPE STRING,
AWORG TYPE STRING,
HWAER TYPE STRING,
HWAE2 TYPE STRING,
HWAE3 TYPE STRING,
BASW2 TYPE STRING,
BASW3 TYPE STRING,
CURT2 TYPE STRING,
CURT3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E2FIHDR_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_E2FIHDR_STR-BUKRS sy-vline 
WA_E2FIHDR_STR-BELNR sy-vline 
WA_E2FIHDR_STR-GJAHR sy-vline 
WA_E2FIHDR_STR-BLART sy-vline 
WA_E2FIHDR_STR-BLDAT sy-vline 
WA_E2FIHDR_STR-BUDAT sy-vline 
WA_E2FIHDR_STR-MONAT sy-vline 
WA_E2FIHDR_STR-WWERT sy-vline 
WA_E2FIHDR_STR-XBLNR sy-vline 
WA_E2FIHDR_STR-BKTXT sy-vline 
WA_E2FIHDR_STR-WAERS sy-vline 
WA_E2FIHDR_STR-KURSF sy-vline 
WA_E2FIHDR_STR-KURS2 sy-vline 
WA_E2FIHDR_STR-KURS3 sy-vline 
WA_E2FIHDR_STR-AWSYS sy-vline 
WA_E2FIHDR_STR-AWTYP sy-vline 
WA_E2FIHDR_STR-AWREF sy-vline 
WA_E2FIHDR_STR-AWORG sy-vline 
WA_E2FIHDR_STR-HWAER sy-vline 
WA_E2FIHDR_STR-HWAE2 sy-vline 
WA_E2FIHDR_STR-HWAE3 sy-vline 
WA_E2FIHDR_STR-BASW2 sy-vline 
WA_E2FIHDR_STR-BASW3 sy-vline 
WA_E2FIHDR_STR-CURT2 sy-vline 
WA_E2FIHDR_STR-CURT3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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