ABAP Select data from SAP table HEADER51 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP HEADER51 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 HEADER51. 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 HEADER51 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_HEADER51 TYPE STANDARD TABLE OF HEADER51,
      WA_HEADER51 TYPE HEADER51,
      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: <HEADER51> TYPE HEADER51.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_HEADER51.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM HEADER51
  INTO TABLE IT_HEADER51.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HEADER51
*  INTO TABLE @DATA(IT_HEADER512).
*--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_HEADER51 INDEX 1 INTO DATA(WA_HEADER512).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_HEADER51 ASSIGNING <HEADER51>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HEADER51>-OBJECT = 1.
<HEADER51>-OBJKEY = 1.
<HEADER51>-PLANHU = 1.
<HEADER51>-KUNNR = 1.
<HEADER51>-SPRAS = 1.

ENDLOOP.

LOOP AT IT_HEADER51 INTO WA_HEADER51.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HEADER51-VSTEL, sy-vline,
  WA_HEADER51-VKORG, sy-vline,
  WA_HEADER51-VTWEG, sy-vline,
  WA_HEADER51-SPART, sy-vline,
  WA_HEADER51-ANZPK, sy-vline,
  WA_HEADER51-LFART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HEADER51 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_HEADER51 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_HEADER51 INTO WA_HEADER51.


*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 KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_HEADER51-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HEADER51-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_HEADER51-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HEADER51-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EXIDV_HIGH
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_HEADER51-EXIDV_HIGH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HEADER51-EXIDV_HIGH.
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_HEADER51_STR, 
OBJECT TYPE STRING,
OBJKEY TYPE STRING,
PLANHU TYPE STRING,
KUNNR TYPE STRING,
SPRAS TYPE STRING,
VSTEL TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
ANZPK TYPE STRING,
LFART TYPE STRING,
REPACK TYPE STRING,
IM_NOT_OK TYPE STRING,
IM_PROCESSED TYPE STRING,
POST_HUMSEG TYPE STRING,
HUM_PROCESS TYPE STRING,
V51POS_HIGH TYPE STRING,
VEPOS_HIGH TYPE STRING,
EXIDV_HIGH TYPE STRING,
DIALOG TYPE STRING,
PROFILE TYPE STRING,
WB_STORNO TYPE STRING,
CONF_DEC TYPE STRING,
NO_STATUS_UPD TYPE STRING,
NO_SERNR_UPD TYPE STRING,
WM_TA_CONF_ACT TYPE STRING,
NO_REFRESH TYPE STRING,
POSTING_CHANGE TYPE STRING,
PARTIAL_GM TYPE STRING,
READ_AR_HUS TYPE STRING,
V6_UPD_DELAYED TYPE STRING,
LE_SCENARIO TYPE STRING,
REPLACE_SCENARIO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HEADER51_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_HEADER51_STR-OBJECT sy-vline 
WA_HEADER51_STR-OBJKEY sy-vline 
WA_HEADER51_STR-PLANHU sy-vline 
WA_HEADER51_STR-KUNNR sy-vline 
WA_HEADER51_STR-SPRAS sy-vline 
WA_HEADER51_STR-VSTEL sy-vline 
WA_HEADER51_STR-VKORG sy-vline 
WA_HEADER51_STR-VTWEG sy-vline 
WA_HEADER51_STR-SPART sy-vline 
WA_HEADER51_STR-ANZPK sy-vline 
WA_HEADER51_STR-LFART sy-vline 
WA_HEADER51_STR-REPACK sy-vline 
WA_HEADER51_STR-IM_NOT_OK sy-vline 
WA_HEADER51_STR-IM_PROCESSED sy-vline 
WA_HEADER51_STR-POST_HUMSEG sy-vline 
WA_HEADER51_STR-HUM_PROCESS sy-vline 
WA_HEADER51_STR-V51POS_HIGH sy-vline 
WA_HEADER51_STR-VEPOS_HIGH sy-vline 
WA_HEADER51_STR-EXIDV_HIGH sy-vline 
WA_HEADER51_STR-DIALOG sy-vline 
WA_HEADER51_STR-PROFILE sy-vline 
WA_HEADER51_STR-WB_STORNO sy-vline 
WA_HEADER51_STR-CONF_DEC sy-vline 
WA_HEADER51_STR-NO_STATUS_UPD sy-vline 
WA_HEADER51_STR-NO_SERNR_UPD sy-vline 
WA_HEADER51_STR-WM_TA_CONF_ACT sy-vline 
WA_HEADER51_STR-NO_REFRESH sy-vline 
WA_HEADER51_STR-POSTING_CHANGE sy-vline 
WA_HEADER51_STR-PARTIAL_GM sy-vline 
WA_HEADER51_STR-READ_AR_HUS sy-vline 
WA_HEADER51_STR-V6_UPD_DELAYED sy-vline 
WA_HEADER51_STR-LE_SCENARIO sy-vline 
WA_HEADER51_STR-REPLACE_SCENARIO sy-vline      INTO ld_text SEPARATED BY SPACE.

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