ABAP Select data from SAP table ESO_S_BKPF_HEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESO_S_BKPF_HEADER
*  INTO TABLE @DATA(IT_ESO_S_BKPF_HEADER2).
*--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_ESO_S_BKPF_HEADER INDEX 1 INTO DATA(WA_ESO_S_BKPF_HEADER2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESO_S_BKPF_HEADER-BUDAT, sy-vline,
  WA_ESO_S_BKPF_HEADER-MONAT, sy-vline,
  WA_ESO_S_BKPF_HEADER-WRBTR, sy-vline,
  WA_ESO_S_BKPF_HEADER-XBLNR, sy-vline,
  WA_ESO_S_BKPF_HEADER-AWTYP, sy-vline,
  WA_ESO_S_BKPF_HEADER-AWKEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESO_S_BKPF_HEADER 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_ESO_S_BKPF_HEADER 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_ESO_S_BKPF_HEADER INTO WA_ESO_S_BKPF_HEADER.


*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_ESO_S_BKPF_HEADER-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESO_S_BKPF_HEADER-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ESO_S_BKPF_HEADER-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESO_S_BKPF_HEADER-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field WRBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_ESO_S_BKPF_HEADER-WRBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESO_S_BKPF_HEADER-WRBTR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_ESO_S_BKPF_HEADER-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESO_S_BKPF_HEADER-LANGU.
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_ESO_S_BKPF_HEADER_STR, 
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BLART TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
MONAT TYPE STRING,
WRBTR TYPE STRING,
XBLNR TYPE STRING,
AWTYP TYPE STRING,
AWKEY TYPE STRING,
AWSYS TYPE STRING,
USNAM TYPE STRING,
BKTXT TYPE STRING,
LANGU TYPE STRING,
KTOPL TYPE STRING,
AMOUNT_R TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESO_S_BKPF_HEADER_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_ESO_S_BKPF_HEADER_STR-BUKRS sy-vline 
WA_ESO_S_BKPF_HEADER_STR-BELNR sy-vline 
WA_ESO_S_BKPF_HEADER_STR-GJAHR sy-vline 
WA_ESO_S_BKPF_HEADER_STR-BLART sy-vline 
WA_ESO_S_BKPF_HEADER_STR-BLDAT sy-vline 
WA_ESO_S_BKPF_HEADER_STR-BUDAT sy-vline 
WA_ESO_S_BKPF_HEADER_STR-MONAT sy-vline 
WA_ESO_S_BKPF_HEADER_STR-WRBTR sy-vline 
WA_ESO_S_BKPF_HEADER_STR-XBLNR sy-vline 
WA_ESO_S_BKPF_HEADER_STR-AWTYP sy-vline 
WA_ESO_S_BKPF_HEADER_STR-AWKEY sy-vline 
WA_ESO_S_BKPF_HEADER_STR-AWSYS sy-vline 
WA_ESO_S_BKPF_HEADER_STR-USNAM sy-vline 
WA_ESO_S_BKPF_HEADER_STR-BKTXT sy-vline 
WA_ESO_S_BKPF_HEADER_STR-LANGU sy-vline 
WA_ESO_S_BKPF_HEADER_STR-KTOPL sy-vline 
WA_ESO_S_BKPF_HEADER_STR-AMOUNT_R sy-vline      INTO ld_text SEPARATED BY SPACE.

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