ABAP Select data from SAP table VPEG_TSTK into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VPEG_TSTK 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_TSTK. 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_TSTK 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_TSTK TYPE STANDARD TABLE OF VPEG_TSTK,
      WA_VPEG_TSTK TYPE VPEG_TSTK,
      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_TSTK> TYPE VPEG_TSTK.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VPEG_TSTK
*  INTO TABLE @DATA(IT_VPEG_TSTK2).
*--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_TSTK INDEX 1 INTO DATA(WA_VPEG_TSTK2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VPEG_TSTK-CHARG, sy-vline,
  WA_VPEG_TSTK-EINDT, sy-vline,
  WA_VPEG_TSTK-TLLONR, sy-vline,
  WA_VPEG_TSTK-SQLAB, sy-vline,
  WA_VPEG_TSTK-SQINS, sy-vline,
  WA_VPEG_TSTK-SQSPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VPEG_TSTK 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_TSTK 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_TSTK INTO WA_VPEG_TSTK.


*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_TSTK-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VPEG_TSTK-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_VPEG_TSTK-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VPEG_TSTK-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_TSTK_STR, 
MANDT TYPE STRING,
WERKS TYPE STRING,
MATNR TYPE STRING,
GRPNR TYPE STRING,
REPOBJ TYPE STRING,
CHARG TYPE STRING,
EINDT TYPE STRING,
TLLONR TYPE STRING,
SQLAB TYPE STRING,
SQINS TYPE STRING,
SQSPE TYPE STRING,
LQTY TYPE STRING,
SCPQTY TYPE STRING,
MEINS TYPE STRING,
WOCOST TYPE STRING,
LOEVM TYPE STRING,
UPDAT TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VPEG_TSTK_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_TSTK_STR-MANDT sy-vline 
WA_VPEG_TSTK_STR-WERKS sy-vline 
WA_VPEG_TSTK_STR-MATNR sy-vline 
WA_VPEG_TSTK_STR-GRPNR sy-vline 
WA_VPEG_TSTK_STR-REPOBJ sy-vline 
WA_VPEG_TSTK_STR-CHARG sy-vline 
WA_VPEG_TSTK_STR-EINDT sy-vline 
WA_VPEG_TSTK_STR-TLLONR sy-vline 
WA_VPEG_TSTK_STR-SQLAB sy-vline 
WA_VPEG_TSTK_STR-SQINS sy-vline 
WA_VPEG_TSTK_STR-SQSPE sy-vline 
WA_VPEG_TSTK_STR-LQTY sy-vline 
WA_VPEG_TSTK_STR-SCPQTY sy-vline 
WA_VPEG_TSTK_STR-MEINS sy-vline 
WA_VPEG_TSTK_STR-WOCOST sy-vline 
WA_VPEG_TSTK_STR-LOEVM sy-vline 
WA_VPEG_TSTK_STR-UPDAT sy-vline 
WA_VPEG_TSTK_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.