ABAP Select data from SAP table VPEG_TACTASS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VPEG_TACTASS
*  INTO TABLE @DATA(IT_VPEG_TACTASS2).
*--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_VPEG_TACTASS INDEX 1 INTO DATA(WA_VPEG_TACTASS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VPEG_TACTASS>-MANDT = 1.
<VPEG_TACTASS>-WERKS = 1.
<VPEG_TACTASS>-MATNR = 1.
<VPEG_TACTASS>-GRPNR = 1.
<VPEG_TACTASS>-S_REPOBJ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VPEG_TACTASS-R_REPOBJ, sy-vline,
  WA_VPEG_TACTASS-ASS_PSPNR, sy-vline,
  WA_VPEG_TACTASS-CHARG, sy-vline,
  WA_VPEG_TACTASS-TLLONR, sy-vline,
  WA_VPEG_TACTASS-ISSQTY, sy-vline,
  WA_VPEG_TACTASS-MEINS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VPEG_TACTASS 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_VPEG_TACTASS 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_VPEG_TACTASS INTO WA_VPEG_TACTASS.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_VPEG_TACTASS-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VPEG_TACTASS-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field GRPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_VPEG_TACTASS-GRPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VPEG_TACTASS-GRPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field ASS_PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_VPEG_TACTASS-ASS_PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VPEG_TACTASS-ASS_PSPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_VPEG_TACTASS-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VPEG_TACTASS-MEINS.
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_VPEG_TACTASS_STR, 
MANDT TYPE STRING,
WERKS TYPE STRING,
MATNR TYPE STRING,
GRPNR TYPE STRING,
S_REPOBJ TYPE STRING,
R_REPOBJ TYPE STRING,
ASS_PSPNR TYPE STRING,
CHARG TYPE STRING,
TLLONR TYPE STRING,
ISSQTY TYPE STRING,
MEINS TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
RSART TYPE STRING,
WOCOST TYPE STRING,
RESDT TYPE STRING,
LOEVM TYPE STRING,
PEGISSUE TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VPEG_TACTASS_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_VPEG_TACTASS_STR-MANDT sy-vline 
WA_VPEG_TACTASS_STR-WERKS sy-vline 
WA_VPEG_TACTASS_STR-MATNR sy-vline 
WA_VPEG_TACTASS_STR-GRPNR sy-vline 
WA_VPEG_TACTASS_STR-S_REPOBJ sy-vline 
WA_VPEG_TACTASS_STR-R_REPOBJ sy-vline 
WA_VPEG_TACTASS_STR-ASS_PSPNR sy-vline 
WA_VPEG_TACTASS_STR-CHARG sy-vline 
WA_VPEG_TACTASS_STR-TLLONR sy-vline 
WA_VPEG_TACTASS_STR-ISSQTY sy-vline 
WA_VPEG_TACTASS_STR-MEINS sy-vline 
WA_VPEG_TACTASS_STR-RSNUM sy-vline 
WA_VPEG_TACTASS_STR-RSPOS sy-vline 
WA_VPEG_TACTASS_STR-RSART sy-vline 
WA_VPEG_TACTASS_STR-WOCOST sy-vline 
WA_VPEG_TACTASS_STR-RESDT sy-vline 
WA_VPEG_TACTASS_STR-LOEVM sy-vline 
WA_VPEG_TACTASS_STR-PEGISSUE sy-vline 
WA_VPEG_TACTASS_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.