ABAP Select data from SAP table VMDS_EI_PURCHASING_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VMDS_EI_PURCHASING_DATA
*  INTO TABLE @DATA(IT_VMDS_EI_PURCHASING_DATA2).
*--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_VMDS_EI_PURCHASING_DATA INDEX 1 INTO DATA(WA_VMDS_EI_PURCHASING_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VMDS_EI_PURCHASING_DATA>-SPERM = 1.
<VMDS_EI_PURCHASING_DATA>-LOEVM = 1.
<VMDS_EI_PURCHASING_DATA>-LFABC = 1.
<VMDS_EI_PURCHASING_DATA>-WAERS = 1.
<VMDS_EI_PURCHASING_DATA>-VERKF = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VMDS_EI_PURCHASING_DATA-TELF1, sy-vline,
  WA_VMDS_EI_PURCHASING_DATA-MINBW, sy-vline,
  WA_VMDS_EI_PURCHASING_DATA-ZTERM, sy-vline,
  WA_VMDS_EI_PURCHASING_DATA-INCO1, sy-vline,
  WA_VMDS_EI_PURCHASING_DATA-INCO2, sy-vline,
  WA_VMDS_EI_PURCHASING_DATA-WEBRE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VMDS_EI_PURCHASING_DATA 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_VMDS_EI_PURCHASING_DATA 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_VMDS_EI_PURCHASING_DATA INTO WA_VMDS_EI_PURCHASING_DATA.


*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 ID004, internal->external for field INCO2_KEY
CALL FUNCTION 'CONVERSION_EXIT_ID004_OUTPUT'
  EXPORTING
    input =                      WA_VMDS_EI_PURCHASING_DATA-INCO2_KEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VMDS_EI_PURCHASING_DATA-INCO2_KEY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ID004, internal->external for field INCO3_KEY
CALL FUNCTION 'CONVERSION_EXIT_ID004_OUTPUT'
  EXPORTING
    input =                      WA_VMDS_EI_PURCHASING_DATA-INCO3_KEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VMDS_EI_PURCHASING_DATA-INCO3_KEY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ID004, internal->external for field INCO4_KEY
CALL FUNCTION 'CONVERSION_EXIT_ID004_OUTPUT'
  EXPORTING
    input =                      WA_VMDS_EI_PURCHASING_DATA-INCO4_KEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VMDS_EI_PURCHASING_DATA-INCO4_KEY.
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_VMDS_EI_PURCHASING_DATA_STR, 
SPERM TYPE STRING,
LOEVM TYPE STRING,
LFABC TYPE STRING,
WAERS TYPE STRING,
VERKF TYPE STRING,
TELF1 TYPE STRING,
MINBW TYPE STRING,
ZTERM TYPE STRING,
INCO1 TYPE STRING,
INCO2 TYPE STRING,
WEBRE TYPE STRING,
KZABS TYPE STRING,
KALSK TYPE STRING,
KZAUT TYPE STRING,
EXPVZ TYPE STRING,
ZOLLA TYPE STRING,
MEPRF TYPE STRING,
EKGRP TYPE STRING,
BOLRE TYPE STRING,
UMSAE TYPE STRING,
XERSY TYPE STRING,
PLIFZ TYPE STRING,
MRPPP TYPE STRING,
LFRHY TYPE STRING,
LIBES TYPE STRING,
LIPRE TYPE STRING,
LISER TYPE STRING,
BOIND TYPE STRING,
PRFRE TYPE STRING,
NRGEW TYPE STRING,
BLIND TYPE STRING,
SKRIT TYPE STRING,
BSTAE TYPE STRING,
RDPRF TYPE STRING,
MEGRU TYPE STRING,
VENSL TYPE STRING,
BOPNR TYPE STRING,
XERSR TYPE STRING,
EIKTO TYPE STRING,
PAPRF TYPE STRING,
AGREL TYPE STRING,
XNBWY TYPE STRING,
VSBED TYPE STRING,
LEBRE TYPE STRING,
KZRET TYPE STRING,
AUBEL TYPE STRING,
VALID_PRO TYPE STRING,
HSCABS TYPE STRING,
HSCPE TYPE STRING,
HSCMIN TYPE STRING,
HSCMAX TYPE STRING,
VENDOR_RMA_REQ TYPE STRING,
INCOV TYPE STRING,
INCO2_L TYPE STRING,
INCO3_L TYPE STRING,
FSH_SC_CID TYPE STRING,
FSH_VAS_DETC TYPE STRING,
ACTIVITY_PROFIL TYPE STRING,
TRANSPORT_CHAIN TYPE STRING,
STAGING_TIME TYPE STRING,
LFM1_EEW_PS TYPE STRING,
INCO2_KEY TYPE STRING,
INCO3_KEY TYPE STRING,
INCO4_KEY TYPE STRING,
UPPRS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VMDS_EI_PURCHASING_DATA_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_VMDS_EI_PURCHASING_DATA_STR-SPERM sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-LOEVM sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-LFABC sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-WAERS sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-VERKF sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-TELF1 sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-MINBW sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-ZTERM sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-INCO1 sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-INCO2 sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-WEBRE sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-KZABS sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-KALSK sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-KZAUT sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-EXPVZ sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-ZOLLA sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-MEPRF sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-EKGRP sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-BOLRE sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-UMSAE sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-XERSY sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-PLIFZ sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-MRPPP sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-LFRHY sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-LIBES sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-LIPRE sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-LISER sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-BOIND sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-PRFRE sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-NRGEW sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-BLIND sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-SKRIT sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-BSTAE sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-RDPRF sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-MEGRU sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-VENSL sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-BOPNR sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-XERSR sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-EIKTO sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-PAPRF sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-AGREL sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-XNBWY sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-VSBED sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-LEBRE sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-KZRET sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-AUBEL sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-VALID_PRO sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-HSCABS sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-HSCPE sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-HSCMIN sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-HSCMAX sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-VENDOR_RMA_REQ sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-INCOV sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-INCO2_L sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-INCO3_L sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-FSH_SC_CID sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-FSH_VAS_DETC sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-ACTIVITY_PROFIL sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-TRANSPORT_CHAIN sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-STAGING_TIME sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-LFM1_EEW_PS sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-INCO2_KEY sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-INCO3_KEY sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-INCO4_KEY sy-vline 
WA_VMDS_EI_PURCHASING_DATA_STR-UPPRS sy-vline      INTO ld_text SEPARATED BY SPACE.

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