ABAP Select data from SAP table VPPMGAG_T_COMMREF 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_COMMREF 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_COMMREF. 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_COMMREF 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_COMMREF TYPE STANDARD TABLE OF VPPMGAG_T_COMMREF,
      WA_VPPMGAG_T_COMMREF TYPE VPPMGAG_T_COMMREF,
      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_COMMREF> TYPE VPPMGAG_T_COMMREF.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VPPMGAG_T_COMMREF
*  INTO TABLE @DATA(IT_VPPMGAG_T_COMMREF2).
*--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_COMMREF INDEX 1 INTO DATA(WA_VPPMGAG_T_COMMREF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VPPMGAG_T_COMMREF>-MANDT = 1.
<VPPMGAG_T_COMMREF>-PREPAYMENTCOMMLREFUUID = 1.
<VPPMGAG_T_COMMREF>-PREPAYMENTAGREEMENTUUID = 1.
<VPPMGAG_T_COMMREF>-PREPAYMENTCOMMLREFTYPE = 1.
<VPPMGAG_T_COMMREF>-PREPAYMENTCOMMERCIALREFERENCE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VPPMGAG_T_COMMREF-PREPAYMENTCOMMLREFNAME, sy-vline,
  WA_VPPMGAG_T_COMMREF-PREPAYMENTREFCONTACTPERSONNAME, sy-vline,
  WA_VPPMGAG_T_COMMREF-PREPAYMENTCOMMLREFCURJOBTITLE, sy-vline,
  WA_VPPMGAG_T_COMMREF-PREPAYMENTCOMMLREFSEGMENT, sy-vline,
  WA_VPPMGAG_T_COMMREF-PREPAYMENTCOMMLREFINDSTRYFUNC, sy-vline,
  WA_VPPMGAG_T_COMMREF-PREPAYMENTCOMMLREFCITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VPPMGAG_T_COMMREF 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_COMMREF 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_COMMREF INTO WA_VPPMGAG_T_COMMREF.


*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 SXIDN, internal->external for field PREPAYMENTCOMMLREFCONTEMAIL
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_VPPMGAG_T_COMMREF-PREPAYMENTCOMMLREFCONTEMAIL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VPPMGAG_T_COMMREF-PREPAYMENTCOMMLREFCONTEMAIL.
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_COMMREF_STR, 
MANDT TYPE STRING,
PREPAYMENTCOMMLREFUUID TYPE STRING,
PREPAYMENTAGREEMENTUUID TYPE STRING,
PREPAYMENTCOMMLREFTYPE TYPE STRING,
PREPAYMENTCOMMERCIALREFERENCE TYPE STRING,
PREPAYMENTCOMMLREFNAME TYPE STRING,
PREPAYMENTREFCONTACTPERSONNAME TYPE STRING,
PREPAYMENTCOMMLREFCURJOBTITLE TYPE STRING,
PREPAYMENTCOMMLREFSEGMENT TYPE STRING,
PREPAYMENTCOMMLREFINDSTRYFUNC TYPE STRING,
PREPAYMENTCOMMLREFCITY TYPE STRING,
PREPAYMENTCOMMLREFCONTNUMBER TYPE STRING,
PREPAYMENTCOMMLREFCONTEMAIL TYPE STRING,
PREPAYMENTCOMMLREFDIVISION 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_COMMREF_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_COMMREF_STR-MANDT sy-vline 
WA_VPPMGAG_T_COMMREF_STR-PREPAYMENTCOMMLREFUUID sy-vline 
WA_VPPMGAG_T_COMMREF_STR-PREPAYMENTAGREEMENTUUID sy-vline 
WA_VPPMGAG_T_COMMREF_STR-PREPAYMENTCOMMLREFTYPE sy-vline 
WA_VPPMGAG_T_COMMREF_STR-PREPAYMENTCOMMERCIALREFERENCE sy-vline 
WA_VPPMGAG_T_COMMREF_STR-PREPAYMENTCOMMLREFNAME sy-vline 
WA_VPPMGAG_T_COMMREF_STR-PREPAYMENTREFCONTACTPERSONNAME sy-vline 
WA_VPPMGAG_T_COMMREF_STR-PREPAYMENTCOMMLREFCURJOBTITLE sy-vline 
WA_VPPMGAG_T_COMMREF_STR-PREPAYMENTCOMMLREFSEGMENT sy-vline 
WA_VPPMGAG_T_COMMREF_STR-PREPAYMENTCOMMLREFINDSTRYFUNC sy-vline 
WA_VPPMGAG_T_COMMREF_STR-PREPAYMENTCOMMLREFCITY sy-vline 
WA_VPPMGAG_T_COMMREF_STR-PREPAYMENTCOMMLREFCONTNUMBER sy-vline 
WA_VPPMGAG_T_COMMREF_STR-PREPAYMENTCOMMLREFCONTEMAIL sy-vline 
WA_VPPMGAG_T_COMMREF_STR-PREPAYMENTCOMMLREFDIVISION sy-vline 
WA_VPPMGAG_T_COMMREF_STR-CREATEDBYUSER sy-vline 
WA_VPPMGAG_T_COMMREF_STR-CREATIONDATETIME sy-vline 
WA_VPPMGAG_T_COMMREF_STR-LASTCHANGEDBYUSER sy-vline 
WA_VPPMGAG_T_COMMREF_STR-LASTCHANGEDATETIME sy-vline 
WA_VPPMGAG_T_COMMREF_STR-PPMGAG_DUMMY sy-vline 
WA_VPPMGAG_T_COMMREF_STR-PPMGAC_SUR_DUMMY sy-vline 
WA_VPPMGAG_T_COMMREF_STR-PPMGAC_BP_DUMMY sy-vline 
WA_VPPMGAG_T_COMMREF_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.