ABAP Select data from SAP table V_LOBM_CAWN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_LOBM_CAWN 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_LOBM_CAWN. 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_LOBM_CAWN 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_LOBM_CAWN TYPE STANDARD TABLE OF V_LOBM_CAWN,
      WA_V_LOBM_CAWN TYPE V_LOBM_CAWN,
      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_LOBM_CAWN> TYPE V_LOBM_CAWN.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_LOBM_CAWN
*  INTO TABLE @DATA(IT_V_LOBM_CAWN2).
*--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_LOBM_CAWN INDEX 1 INTO DATA(WA_V_LOBM_CAWN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_LOBM_CAWN>-ATINN = 1.
<V_LOBM_CAWN>-ATZHL = 1.
<V_LOBM_CAWN>-ADZHL = 1.
<V_LOBM_CAWN>-ATWRT = 1.
<V_LOBM_CAWN>-ATFLV = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_LOBM_CAWN-ATFLB, sy-vline,
  WA_V_LOBM_CAWN-ATCOD, sy-vline,
  WA_V_LOBM_CAWN-ATSTD, sy-vline,
  WA_V_LOBM_CAWN-ATAWE, sy-vline,
  WA_V_LOBM_CAWN-ATAW1, sy-vline,
  WA_V_LOBM_CAWN-ATIDN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_LOBM_CAWN 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_LOBM_CAWN 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_LOBM_CAWN INTO WA_V_LOBM_CAWN.


*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 ICHAR, internal->external for field ATINN
CALL FUNCTION 'CONVERSION_EXIT_ICHAR_OUTPUT'
  EXPORTING
    input =                      WA_V_LOBM_CAWN-ATINN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_LOBM_CAWN-ATINN.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field ATAW1
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_V_LOBM_CAWN-ATAW1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_LOBM_CAWN-ATAW1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_V_LOBM_CAWN-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_LOBM_CAWN-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_LOBM_CAWN-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_LOBM_CAWN-AENNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_LOBM_CAWN-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_LOBM_CAWN-DOKNR.
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_LOBM_CAWN_STR, 
ATINN TYPE STRING,
ATZHL TYPE STRING,
ADZHL TYPE STRING,
ATWRT TYPE STRING,
ATFLV TYPE STRING,
ATFLB TYPE STRING,
ATCOD TYPE STRING,
ATSTD TYPE STRING,
ATAWE TYPE STRING,
ATAW1 TYPE STRING,
ATIDN TYPE STRING,
SPRAS TYPE STRING,
TXTNR TYPE STRING,
DATUV TYPE STRING,
TECHV TYPE STRING,
AENNR TYPE STRING,
LKENZ TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
ATZHH TYPE STRING,
KNOBJ TYPE STRING,
ATWHI TYPE STRING,
ATTLV TYPE STRING,
ATTLB TYPE STRING,
ATPRZ TYPE STRING,
ATINC TYPE STRING,
ATVPL TYPE STRING,
DATUB TYPE STRING,
DEC_FROM TYPE STRING,
DEC_TO TYPE STRING,
DATE_FROM TYPE STRING,
DATE_TO TYPE STRING,
TIME_FROM TYPE STRING,
TIME_TO TYPE STRING,
CURR_FROM TYPE STRING,
CURR_TO TYPE STRING,
CURRENCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_LOBM_CAWN_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_LOBM_CAWN_STR-ATINN sy-vline 
WA_V_LOBM_CAWN_STR-ATZHL sy-vline 
WA_V_LOBM_CAWN_STR-ADZHL sy-vline 
WA_V_LOBM_CAWN_STR-ATWRT sy-vline 
WA_V_LOBM_CAWN_STR-ATFLV sy-vline 
WA_V_LOBM_CAWN_STR-ATFLB sy-vline 
WA_V_LOBM_CAWN_STR-ATCOD sy-vline 
WA_V_LOBM_CAWN_STR-ATSTD sy-vline 
WA_V_LOBM_CAWN_STR-ATAWE sy-vline 
WA_V_LOBM_CAWN_STR-ATAW1 sy-vline 
WA_V_LOBM_CAWN_STR-ATIDN sy-vline 
WA_V_LOBM_CAWN_STR-SPRAS sy-vline 
WA_V_LOBM_CAWN_STR-TXTNR sy-vline 
WA_V_LOBM_CAWN_STR-DATUV sy-vline 
WA_V_LOBM_CAWN_STR-TECHV sy-vline 
WA_V_LOBM_CAWN_STR-AENNR sy-vline 
WA_V_LOBM_CAWN_STR-LKENZ sy-vline 
WA_V_LOBM_CAWN_STR-DOKAR sy-vline 
WA_V_LOBM_CAWN_STR-DOKNR sy-vline 
WA_V_LOBM_CAWN_STR-DOKVR sy-vline 
WA_V_LOBM_CAWN_STR-DOKTL sy-vline 
WA_V_LOBM_CAWN_STR-ATZHH sy-vline 
WA_V_LOBM_CAWN_STR-KNOBJ sy-vline 
WA_V_LOBM_CAWN_STR-ATWHI sy-vline 
WA_V_LOBM_CAWN_STR-ATTLV sy-vline 
WA_V_LOBM_CAWN_STR-ATTLB sy-vline 
WA_V_LOBM_CAWN_STR-ATPRZ sy-vline 
WA_V_LOBM_CAWN_STR-ATINC sy-vline 
WA_V_LOBM_CAWN_STR-ATVPL sy-vline 
WA_V_LOBM_CAWN_STR-DATUB sy-vline 
WA_V_LOBM_CAWN_STR-DEC_FROM sy-vline 
WA_V_LOBM_CAWN_STR-DEC_TO sy-vline 
WA_V_LOBM_CAWN_STR-DATE_FROM sy-vline 
WA_V_LOBM_CAWN_STR-DATE_TO sy-vline 
WA_V_LOBM_CAWN_STR-TIME_FROM sy-vline 
WA_V_LOBM_CAWN_STR-TIME_TO sy-vline 
WA_V_LOBM_CAWN_STR-CURR_FROM sy-vline 
WA_V_LOBM_CAWN_STR-CURR_TO sy-vline 
WA_V_LOBM_CAWN_STR-CURRENCY sy-vline      INTO ld_text SEPARATED BY SPACE.

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