ABAP Select data from SAP table VPPMGAG_T_HARV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VPPMGAG_T_HARV
*  INTO TABLE @DATA(IT_VPPMGAG_T_HARV2).
*--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_VPPMGAG_T_HARV INDEX 1 INTO DATA(WA_VPPMGAG_T_HARV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VPPMGAG_T_HARV>-MANDT = 1.
<VPPMGAG_T_HARV>-PREPAYMENTAGRMTHARVESTUUID = 1.
<VPPMGAG_T_HARV>-PREPAYMENTAGREEMENTUUID = 1.
<VPPMGAG_T_HARV>-PREPAYMENTAGRMTHARVESTYEAR = 1.
<VPPMGAG_T_HARV>-PREPAYMENTAGREEMENTCOMMODITY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VPPMGAG_T_HARV-PREPAYMENTHARVESTTOTALAREAQTY, sy-vline,
  WA_VPPMGAG_T_HARV-PREPAYMENTHARVESTTOTALAREAUOM, sy-vline,
  WA_VPPMGAG_T_HARV-PREPAYMENTHISTPLANTEDAREAUOM, sy-vline,
  WA_VPPMGAG_T_HARV-PREPAYMENTHARVESTPRODUCTIVITY, sy-vline,
  WA_VPPMGAG_T_HARV-PREPAYMENTHARVESTLASTPRODUCT, sy-vline,
  WA_VPPMGAG_T_HARV-PREPAYMENTHARVESTSALESQTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VPPMGAG_T_HARV 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_VPPMGAG_T_HARV 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_VPPMGAG_T_HARV INTO WA_VPPMGAG_T_HARV.


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

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

*Conversion exit CUNIT, internal->external for field PREPAYMENTHARVESTSALESUOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_VPPMGAG_T_HARV-PREPAYMENTHARVESTSALESUOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VPPMGAG_T_HARV-PREPAYMENTHARVESTSALESUOM.
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_VPPMGAG_T_HARV_STR, 
MANDT TYPE STRING,
PREPAYMENTAGRMTHARVESTUUID TYPE STRING,
PREPAYMENTAGREEMENTUUID TYPE STRING,
PREPAYMENTAGRMTHARVESTYEAR TYPE STRING,
PREPAYMENTAGREEMENTCOMMODITY TYPE STRING,
PREPAYMENTHARVESTTOTALAREAQTY TYPE STRING,
PREPAYMENTHARVESTTOTALAREAUOM TYPE STRING,
PREPAYMENTHISTPLANTEDAREAUOM TYPE STRING,
PREPAYMENTHARVESTPRODUCTIVITY TYPE STRING,
PREPAYMENTHARVESTLASTPRODUCT TYPE STRING,
PREPAYMENTHARVESTSALESQTY TYPE STRING,
PREPAYMENTHARVESTSALESUOM TYPE STRING,
PREPAYMENTHARVESTOBSERVATIONS TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATETIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
PPMGAG_DUMMY TYPE STRING,
PPMGAC_SUR_DUMMY TYPE STRING,
PPMGAC_BP_DUMMY TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VPPMGAG_T_HARV_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_VPPMGAG_T_HARV_STR-MANDT sy-vline 
WA_VPPMGAG_T_HARV_STR-PREPAYMENTAGRMTHARVESTUUID sy-vline 
WA_VPPMGAG_T_HARV_STR-PREPAYMENTAGREEMENTUUID sy-vline 
WA_VPPMGAG_T_HARV_STR-PREPAYMENTAGRMTHARVESTYEAR sy-vline 
WA_VPPMGAG_T_HARV_STR-PREPAYMENTAGREEMENTCOMMODITY sy-vline 
WA_VPPMGAG_T_HARV_STR-PREPAYMENTHARVESTTOTALAREAQTY sy-vline 
WA_VPPMGAG_T_HARV_STR-PREPAYMENTHARVESTTOTALAREAUOM sy-vline 
WA_VPPMGAG_T_HARV_STR-PREPAYMENTHISTPLANTEDAREAUOM sy-vline 
WA_VPPMGAG_T_HARV_STR-PREPAYMENTHARVESTPRODUCTIVITY sy-vline 
WA_VPPMGAG_T_HARV_STR-PREPAYMENTHARVESTLASTPRODUCT sy-vline 
WA_VPPMGAG_T_HARV_STR-PREPAYMENTHARVESTSALESQTY sy-vline 
WA_VPPMGAG_T_HARV_STR-PREPAYMENTHARVESTSALESUOM sy-vline 
WA_VPPMGAG_T_HARV_STR-PREPAYMENTHARVESTOBSERVATIONS sy-vline 
WA_VPPMGAG_T_HARV_STR-CREATEDBYUSER sy-vline 
WA_VPPMGAG_T_HARV_STR-CREATIONDATETIME sy-vline 
WA_VPPMGAG_T_HARV_STR-LASTCHANGEDBYUSER sy-vline 
WA_VPPMGAG_T_HARV_STR-LASTCHANGEDATETIME sy-vline 
WA_VPPMGAG_T_HARV_STR-PPMGAG_DUMMY sy-vline 
WA_VPPMGAG_T_HARV_STR-PPMGAC_SUR_DUMMY sy-vline 
WA_VPPMGAG_T_HARV_STR-PPMGAC_BP_DUMMY sy-vline 
WA_VPPMGAG_T_HARV_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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