ABAP Select data from SAP table V_TWBO1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_TWBO1 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 V_TWBO1. 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 V_TWBO1 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_V_TWBO1 TYPE STANDARD TABLE OF V_TWBO1,
      WA_V_TWBO1 TYPE V_TWBO1,
      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: <V_TWBO1> TYPE V_TWBO1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_TWBO1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_TWBO1
  INTO TABLE IT_V_TWBO1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_TWBO1
*  INTO TABLE @DATA(IT_V_TWBO12).
*--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_V_TWBO1 INDEX 1 INTO DATA(WA_V_TWBO12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_TWBO1 ASSIGNING <V_TWBO1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_TWBO1>-MANDT = 1.
<V_TWBO1>-BOPNR = 1.
<V_TWBO1>-BORESTRI = 1.
<V_TWBO1>-BOTYPI = 1.
<V_TWBO1>-PROBEZ = 1.

ENDLOOP.

LOOP AT IT_V_TWBO1 INTO WA_V_TWBO1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_TWBO1-BORESMNG, sy-vline,
  WA_V_TWBO1-MEINS, sy-vline,
  WA_V_TWBO1-BORESVOL, sy-vline,
  WA_V_TWBO1-VOLEH, sy-vline,
  WA_V_TWBO1-BORESWGT, sy-vline,
  WA_V_TWBO1-GEWEI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_TWBO1 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_V_TWBO1 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_V_TWBO1 INTO WA_V_TWBO1.


*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 MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_V_TWBO1-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TWBO1-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VOLEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_V_TWBO1-VOLEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TWBO1-VOLEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GEWEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_V_TWBO1-GEWEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TWBO1-GEWEI.
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_V_TWBO1_STR, 
MANDT TYPE STRING,
BOPNR TYPE STRING,
BORESTRI TYPE STRING,
BOTYPI TYPE STRING,
PROBEZ TYPE STRING,
BORESMNG TYPE STRING,
MEINS TYPE STRING,
BORESVOL TYPE STRING,
VOLEH TYPE STRING,
BORESWGT TYPE STRING,
GEWEI TYPE STRING,
BORESVAL TYPE STRING,
WAERS TYPE STRING,
KSCHL TYPE STRING,
BOTOL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_TWBO1_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_V_TWBO1_STR-MANDT sy-vline 
WA_V_TWBO1_STR-BOPNR sy-vline 
WA_V_TWBO1_STR-BORESTRI sy-vline 
WA_V_TWBO1_STR-BOTYPI sy-vline 
WA_V_TWBO1_STR-PROBEZ sy-vline 
WA_V_TWBO1_STR-BORESMNG sy-vline 
WA_V_TWBO1_STR-MEINS sy-vline 
WA_V_TWBO1_STR-BORESVOL sy-vline 
WA_V_TWBO1_STR-VOLEH sy-vline 
WA_V_TWBO1_STR-BORESWGT sy-vline 
WA_V_TWBO1_STR-GEWEI sy-vline 
WA_V_TWBO1_STR-BORESVAL sy-vline 
WA_V_TWBO1_STR-WAERS sy-vline 
WA_V_TWBO1_STR-KSCHL sy-vline 
WA_V_TWBO1_STR-BOTOL sy-vline      INTO ld_text SEPARATED BY SPACE.

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