ABAP Select data from SAP table MIG_VMDS_EI_PURCHASING2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MIG_VMDS_EI_PURCHASING2 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 MIG_VMDS_EI_PURCHASING2. 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 MIG_VMDS_EI_PURCHASING2 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_MIG_VMDS_EI_PURCHASING2 TYPE STANDARD TABLE OF MIG_VMDS_EI_PURCHASING2,
      WA_MIG_VMDS_EI_PURCHASING2 TYPE MIG_VMDS_EI_PURCHASING2,
      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: <MIG_VMDS_EI_PURCHASING2> TYPE MIG_VMDS_EI_PURCHASING2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MIG_VMDS_EI_PURCHASING2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MIG_VMDS_EI_PURCHASING2
  INTO TABLE IT_MIG_VMDS_EI_PURCHASING2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MIG_VMDS_EI_PURCHASING2
*  INTO TABLE @DATA(IT_MIG_VMDS_EI_PURCHASING22).
*--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_MIG_VMDS_EI_PURCHASING2 INDEX 1 INTO DATA(WA_MIG_VMDS_EI_PURCHASING22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MIG_VMDS_EI_PURCHASING2 ASSIGNING <MIG_VMDS_EI_PURCHASING2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MIG_VMDS_EI_PURCHASING2>-LTSNRKEY = 1.
<MIG_VMDS_EI_PURCHASING2>-WERKSKEY = 1.
<MIG_VMDS_EI_PURCHASING2>-SPERMDAT = 1.
<MIG_VMDS_EI_PURCHASING2>-LOEVMDAT = 1.
<MIG_VMDS_EI_PURCHASING2>-LFABCDAT = 1.

ENDLOOP.

LOOP AT IT_MIG_VMDS_EI_PURCHASING2 INTO WA_MIG_VMDS_EI_PURCHASING2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MIG_VMDS_EI_PURCHASING2-WAERSDAT, sy-vline,
  WA_MIG_VMDS_EI_PURCHASING2-VERKFDAT, sy-vline,
  WA_MIG_VMDS_EI_PURCHASING2-TELF1DAT, sy-vline,
  WA_MIG_VMDS_EI_PURCHASING2-MINBWDAT, sy-vline,
  WA_MIG_VMDS_EI_PURCHASING2-ZTERMDAT, sy-vline,
  WA_MIG_VMDS_EI_PURCHASING2-INCO1DAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MIG_VMDS_EI_PURCHASING2 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_MIG_VMDS_EI_PURCHASING2 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_MIG_VMDS_EI_PURCHASING2 INTO WA_MIG_VMDS_EI_PURCHASING2.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_MIG_VMDS_EI_PURCHASING2_STR, 
LTSNRKEY TYPE STRING,
WERKSKEY TYPE STRING,
SPERMDAT TYPE STRING,
LOEVMDAT TYPE STRING,
LFABCDAT TYPE STRING,
WAERSDAT TYPE STRING,
VERKFDAT TYPE STRING,
TELF1DAT TYPE STRING,
MINBWDAT TYPE STRING,
ZTERMDAT TYPE STRING,
INCO1DAT TYPE STRING,
INCO2DAT TYPE STRING,
WEBREDAT TYPE STRING,
KZABSDAT TYPE STRING,
KALSKDAT TYPE STRING,
KZAUTDAT TYPE STRING,
EXPVZDAT TYPE STRING,
ZOLLADAT TYPE STRING,
MEPRFDAT TYPE STRING,
EKGRPDAT TYPE STRING,
BOLREDAT TYPE STRING,
UMSAEDAT TYPE STRING,
XERSYDAT TYPE STRING,
PLIFZDAT TYPE STRING,
MRPPPDAT TYPE STRING,
LFRHYDAT TYPE STRING,
LIBESDAT TYPE STRING,
LIPREDAT TYPE STRING,
LISERDAT TYPE STRING,
DISPODAT TYPE STRING,
BSTAEDAT TYPE STRING,
RDPRFDAT TYPE STRING,
MEGRUDAT TYPE STRING,
BOPNRDAT TYPE STRING,
XERSRDAT TYPE STRING,
PAPRFDAT TYPE STRING,
XNBWYDAT TYPE STRING,
LEBREDAT TYPE STRING,
ABUEBDAT TYPE STRING,
INCOVDAT TYPE STRING,
INCO2_LDAT TYPE STRING,
INCO3_LDAT TYPE STRING,
TRANSPORT_CHAINDAT TYPE STRING,
STAGING_TIMEDAT TYPE STRING,
WEORADAT TYPE STRING,
UPPRSDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MIG_VMDS_EI_PURCHASING2_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_MIG_VMDS_EI_PURCHASING2_STR-LTSNRKEY sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-WERKSKEY sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-SPERMDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-LOEVMDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-LFABCDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-WAERSDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-VERKFDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-TELF1DAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-MINBWDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-ZTERMDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-INCO1DAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-INCO2DAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-WEBREDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-KZABSDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-KALSKDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-KZAUTDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-EXPVZDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-ZOLLADAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-MEPRFDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-EKGRPDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-BOLREDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-UMSAEDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-XERSYDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-PLIFZDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-MRPPPDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-LFRHYDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-LIBESDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-LIPREDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-LISERDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-DISPODAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-BSTAEDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-RDPRFDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-MEGRUDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-BOPNRDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-XERSRDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-PAPRFDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-XNBWYDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-LEBREDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-ABUEBDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-INCOVDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-INCO2_LDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-INCO3_LDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-TRANSPORT_CHAINDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-STAGING_TIMEDAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-WEORADAT sy-vline 
WA_MIG_VMDS_EI_PURCHASING2_STR-UPPRSDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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