ABAP Select data from SAP table VLOP_S_IT_REF_H into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VLOP_S_IT_REF_H
*  INTO TABLE @DATA(IT_VLOP_S_IT_REF_H2).
*--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_VLOP_S_IT_REF_H INDEX 1 INTO DATA(WA_VLOP_S_IT_REF_H2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VLOP_S_IT_REF_H>-CLIENT_H = 1.
<VLOP_S_IT_REF_H>-REF_GUID_H = 1.
<VLOP_S_IT_REF_H>-LOP_CAT_H = 1.
<VLOP_S_IT_REF_H>-LOP_COUNT_H = 1.
<VLOP_S_IT_REF_H>-UPDKZ_H = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VLOP_S_IT_REF_H-CLIENT, sy-vline,
  WA_VLOP_S_IT_REF_H-LIST_GUID, sy-vline,
  WA_VLOP_S_IT_REF_H-LOP_COUNT, sy-vline,
  WA_VLOP_S_IT_REF_H-ITEM_GUID, sy-vline,
  WA_VLOP_S_IT_REF_H-EXT_REF, sy-vline,
  WA_VLOP_S_IT_REF_H-OPT_EXEC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VLOP_S_IT_REF_H 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_VLOP_S_IT_REF_H 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_VLOP_S_IT_REF_H INTO WA_VLOP_S_IT_REF_H.


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

*Conversion exit CUNIT, internal->external for field UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_VLOP_S_IT_REF_H-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VLOP_S_IT_REF_H-UNIT.
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_VLOP_S_IT_REF_H_STR, 
CLIENT_H TYPE STRING,
REF_GUID_H TYPE STRING,
LOP_CAT_H TYPE STRING,
LOP_COUNT_H TYPE STRING,
UPDKZ_H TYPE STRING,
CLIENT TYPE STRING,
LIST_GUID TYPE STRING,
LOP_COUNT TYPE STRING,
ITEM_GUID TYPE STRING,
EXT_REF TYPE STRING,
OPT_EXEC TYPE STRING,
TEXT_EXIST TYPE STRING,
CR_NAME TYPE STRING,
CR_DATE TYPE STRING,
CR_TIME TYPE STRING,
CH_NAME TYPE STRING,
CH_DATE TYPE STRING,
CH_TIME TYPE STRING,
MATNR TYPE STRING,
PLANT TYPE STRING,
INCO1 TYPE STRING,
INCO2 TYPE STRING,
COUNTRY TYPE STRING,
QTY_MIN TYPE STRING,
QTY_MAX TYPE STRING,
UNIT TYPE STRING,
DATE_FROM TYPE STRING,
DATE_TO TYPE STRING,
PLACE_HOLDER TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VLOP_S_IT_REF_H_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_VLOP_S_IT_REF_H_STR-CLIENT_H sy-vline 
WA_VLOP_S_IT_REF_H_STR-REF_GUID_H sy-vline 
WA_VLOP_S_IT_REF_H_STR-LOP_CAT_H sy-vline 
WA_VLOP_S_IT_REF_H_STR-LOP_COUNT_H sy-vline 
WA_VLOP_S_IT_REF_H_STR-UPDKZ_H sy-vline 
WA_VLOP_S_IT_REF_H_STR-CLIENT sy-vline 
WA_VLOP_S_IT_REF_H_STR-LIST_GUID sy-vline 
WA_VLOP_S_IT_REF_H_STR-LOP_COUNT sy-vline 
WA_VLOP_S_IT_REF_H_STR-ITEM_GUID sy-vline 
WA_VLOP_S_IT_REF_H_STR-EXT_REF sy-vline 
WA_VLOP_S_IT_REF_H_STR-OPT_EXEC sy-vline 
WA_VLOP_S_IT_REF_H_STR-TEXT_EXIST sy-vline 
WA_VLOP_S_IT_REF_H_STR-CR_NAME sy-vline 
WA_VLOP_S_IT_REF_H_STR-CR_DATE sy-vline 
WA_VLOP_S_IT_REF_H_STR-CR_TIME sy-vline 
WA_VLOP_S_IT_REF_H_STR-CH_NAME sy-vline 
WA_VLOP_S_IT_REF_H_STR-CH_DATE sy-vline 
WA_VLOP_S_IT_REF_H_STR-CH_TIME sy-vline 
WA_VLOP_S_IT_REF_H_STR-MATNR sy-vline 
WA_VLOP_S_IT_REF_H_STR-PLANT sy-vline 
WA_VLOP_S_IT_REF_H_STR-INCO1 sy-vline 
WA_VLOP_S_IT_REF_H_STR-INCO2 sy-vline 
WA_VLOP_S_IT_REF_H_STR-COUNTRY sy-vline 
WA_VLOP_S_IT_REF_H_STR-QTY_MIN sy-vline 
WA_VLOP_S_IT_REF_H_STR-QTY_MAX sy-vline 
WA_VLOP_S_IT_REF_H_STR-UNIT sy-vline 
WA_VLOP_S_IT_REF_H_STR-DATE_FROM sy-vline 
WA_VLOP_S_IT_REF_H_STR-DATE_TO sy-vline 
WA_VLOP_S_IT_REF_H_STR-PLACE_HOLDER sy-vline 
WA_VLOP_S_IT_REF_H_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.