ABAP Select data from SAP table MEAPO_PO_HISTORY_EXT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MEAPO_PO_HISTORY_EXT
*  INTO TABLE @DATA(IT_MEAPO_PO_HISTORY_EXT2).
*--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_MEAPO_PO_HISTORY_EXT INDEX 1 INTO DATA(WA_MEAPO_PO_HISTORY_EXT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MEAPO_PO_HISTORY_EXT>-EBELN = 1.
<MEAPO_PO_HISTORY_EXT>-EBELP = 1.
<MEAPO_PO_HISTORY_EXT>-ZEKKN = 1.
<MEAPO_PO_HISTORY_EXT>-VGABE = 1.
<MEAPO_PO_HISTORY_EXT>-GJAHR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MEAPO_PO_HISTORY_EXT-BELNR, sy-vline,
  WA_MEAPO_PO_HISTORY_EXT-BUZEI, sy-vline,
  WA_MEAPO_PO_HISTORY_EXT-BEWTP, sy-vline,
  WA_MEAPO_PO_HISTORY_EXT-BWART, sy-vline,
  WA_MEAPO_PO_HISTORY_EXT-BUDAT, sy-vline,
  WA_MEAPO_PO_HISTORY_EXT-MENGE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MEAPO_PO_HISTORY_EXT 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_MEAPO_PO_HISTORY_EXT 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_MEAPO_PO_HISTORY_EXT INTO WA_MEAPO_PO_HISTORY_EXT.


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

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

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

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

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

*Conversion exit MATN5, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN5_OUTPUT'
  EXPORTING
    input =                      WA_MEAPO_PO_HISTORY_EXT-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEAPO_PO_HISTORY_EXT-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field LSMEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MEAPO_PO_HISTORY_EXT-LSMEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEAPO_PO_HISTORY_EXT-LSMEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN5, internal->external for field EMATN
CALL FUNCTION 'CONVERSION_EXIT_MATN5_OUTPUT'
  EXPORTING
    input =                      WA_MEAPO_PO_HISTORY_EXT-EMATN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEAPO_PO_HISTORY_EXT-EMATN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MEAPO_PO_HISTORY_EXT-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEAPO_PO_HISTORY_EXT-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BPRME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MEAPO_PO_HISTORY_EXT-BPRME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEAPO_PO_HISTORY_EXT-BPRME.
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_MEAPO_PO_HISTORY_EXT_STR, 
EBELN TYPE STRING,
EBELP TYPE STRING,
ZEKKN TYPE STRING,
VGABE TYPE STRING,
GJAHR TYPE STRING,
BELNR TYPE STRING,
BUZEI TYPE STRING,
BEWTP TYPE STRING,
BWART TYPE STRING,
BUDAT TYPE STRING,
MENGE TYPE STRING,
BPMNG TYPE STRING,
DMBTR TYPE STRING,
WRBTR TYPE STRING,
WAERS TYPE STRING,
AREWR TYPE STRING,
WESBS TYPE STRING,
BPWES TYPE STRING,
SHKZG TYPE STRING,
BWTAR TYPE STRING,
ELIKZ TYPE STRING,
XBLNR TYPE STRING,
LFGJA TYPE STRING,
LFBNR TYPE STRING,
LFPOS TYPE STRING,
GRUND TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
REEWR TYPE STRING,
REFWR TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
ETENS TYPE STRING,
KNUMV TYPE STRING,
MWSKZ TYPE STRING,
LSMNG TYPE STRING,
LSMEH TYPE STRING,
EMATN TYPE STRING,
HSWAE TYPE STRING,
CHARG TYPE STRING,
BLDAT TYPE STRING,
MEINS TYPE STRING,
BPRME TYPE STRING,
WEBRE TYPE STRING,
BEWTL TYPE STRING,
BEWTK TYPE STRING,
MATNR_LONG TYPE STRING,
EMATN_LONG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MEAPO_PO_HISTORY_EXT_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_MEAPO_PO_HISTORY_EXT_STR-EBELN sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-EBELP sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-ZEKKN sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-VGABE sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-GJAHR sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-BELNR sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-BUZEI sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-BEWTP sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-BWART sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-BUDAT sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-MENGE sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-BPMNG sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-DMBTR sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-WRBTR sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-WAERS sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-AREWR sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-WESBS sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-BPWES sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-SHKZG sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-BWTAR sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-ELIKZ sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-XBLNR sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-LFGJA sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-LFBNR sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-LFPOS sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-GRUND sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-CPUDT sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-CPUTM sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-REEWR sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-REFWR sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-MATNR sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-WERKS sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-ETENS sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-KNUMV sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-MWSKZ sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-LSMNG sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-LSMEH sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-EMATN sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-HSWAE sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-CHARG sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-BLDAT sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-MEINS sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-BPRME sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-WEBRE sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-BEWTL sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-BEWTK sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-MATNR_LONG sy-vline 
WA_MEAPO_PO_HISTORY_EXT_STR-EMATN_LONG sy-vline      INTO ld_text SEPARATED BY SPACE.

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