ABAP Select data from SAP table V_TCLO into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_TCLO 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_TCLO. 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_TCLO 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_TCLO TYPE STANDARD TABLE OF V_TCLO,
      WA_V_TCLO TYPE V_TCLO,
      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_TCLO> TYPE V_TCLO.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_TCLO
*  INTO TABLE @DATA(IT_V_TCLO2).
*--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_TCLO INDEX 1 INTO DATA(WA_V_TCLO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_TCLO>-OBTAB = 1.
<V_TCLO>-TCODE = 1.
<V_TCLO>-KEYF0 = 1.
<V_TCLO>-PARID0 = 1.
<V_TCLO>-KEYF1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_TCLO-PARID1, sy-vline,
  WA_V_TCLO-KEYF2, sy-vline,
  WA_V_TCLO-PARID2, sy-vline,
  WA_V_TCLO-KEYF3, sy-vline,
  WA_V_TCLO-PARID3, sy-vline,
  WA_V_TCLO-KEYF4, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_TCLO 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_TCLO 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_TCLO INTO WA_V_TCLO.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_V_TCLO_STR, 
OBTAB TYPE STRING,
TCODE TYPE STRING,
KEYF0 TYPE STRING,
PARID0 TYPE STRING,
KEYF1 TYPE STRING,
PARID1 TYPE STRING,
KEYF2 TYPE STRING,
PARID2 TYPE STRING,
KEYF3 TYPE STRING,
PARID3 TYPE STRING,
KEYF4 TYPE STRING,
PARID4 TYPE STRING,
KEYF5 TYPE STRING,
PARID5 TYPE STRING,
KEYF6 TYPE STRING,
PARID6 TYPE STRING,
KEYF7 TYPE STRING,
PARID7 TYPE STRING,
KEYF8 TYPE STRING,
PARID8 TYPE STRING,
KEYF9 TYPE STRING,
PARID9 TYPE STRING,
TEXTF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_TCLO_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_TCLO_STR-OBTAB sy-vline 
WA_V_TCLO_STR-TCODE sy-vline 
WA_V_TCLO_STR-KEYF0 sy-vline 
WA_V_TCLO_STR-PARID0 sy-vline 
WA_V_TCLO_STR-KEYF1 sy-vline 
WA_V_TCLO_STR-PARID1 sy-vline 
WA_V_TCLO_STR-KEYF2 sy-vline 
WA_V_TCLO_STR-PARID2 sy-vline 
WA_V_TCLO_STR-KEYF3 sy-vline 
WA_V_TCLO_STR-PARID3 sy-vline 
WA_V_TCLO_STR-KEYF4 sy-vline 
WA_V_TCLO_STR-PARID4 sy-vline 
WA_V_TCLO_STR-KEYF5 sy-vline 
WA_V_TCLO_STR-PARID5 sy-vline 
WA_V_TCLO_STR-KEYF6 sy-vline 
WA_V_TCLO_STR-PARID6 sy-vline 
WA_V_TCLO_STR-KEYF7 sy-vline 
WA_V_TCLO_STR-PARID7 sy-vline 
WA_V_TCLO_STR-KEYF8 sy-vline 
WA_V_TCLO_STR-PARID8 sy-vline 
WA_V_TCLO_STR-KEYF9 sy-vline 
WA_V_TCLO_STR-PARID9 sy-vline 
WA_V_TCLO_STR-TEXTF sy-vline      INTO ld_text SEPARATED BY SPACE.

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