ABAP Select data from SAP table V_T52EL_COMP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_T52EL_COMP 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_T52EL_COMP. 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_T52EL_COMP 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_T52EL_COMP TYPE STANDARD TABLE OF V_T52EL_COMP,
      WA_V_T52EL_COMP TYPE V_T52EL_COMP,
      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_T52EL_COMP> TYPE V_T52EL_COMP.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_T52EL_COMP.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_T52EL_COMP
  INTO TABLE IT_V_T52EL_COMP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_T52EL_COMP
*  INTO TABLE @DATA(IT_V_T52EL_COMP2).
*--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_T52EL_COMP INDEX 1 INTO DATA(WA_V_T52EL_COMP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_T52EL_COMP ASSIGNING <V_T52EL_COMP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_T52EL_COMP>-MANDT = 1.
<V_T52EL_COMP>-MOLGA = 1.
<V_T52EL_COMP>-LGART = 1.
<V_T52EL_COMP>-SEQNO = 1.
<V_T52EL_COMP>-ENDDA = 1.

ENDLOOP.

LOOP AT IT_V_T52EL_COMP INTO WA_V_T52EL_COMP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_T52EL_COMP-LGTXT, sy-vline,
  WA_V_T52EL_COMP-SIGN, sy-vline,
  WA_V_T52EL_COMP-SPPRC, sy-vline,
  WA_V_T52EL_COMP-SYMKO, sy-vline,
  WA_V_T52EL_COMP-KOART, sy-vline,
  WA_V_T52EL_COMP-SYMKOTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_T52EL_COMP 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_T52EL_COMP 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_T52EL_COMP INTO WA_V_T52EL_COMP.


*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_T52EL_COMP_STR, 
MANDT TYPE STRING,
MOLGA TYPE STRING,
LGART TYPE STRING,
SEQNO TYPE STRING,
ENDDA TYPE STRING,
LGTXT TYPE STRING,
SIGN TYPE STRING,
SPPRC TYPE STRING,
SYMKO TYPE STRING,
KOART TYPE STRING,
SYMKOTEXT TYPE STRING,
C1IGN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_T52EL_COMP_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_T52EL_COMP_STR-MANDT sy-vline 
WA_V_T52EL_COMP_STR-MOLGA sy-vline 
WA_V_T52EL_COMP_STR-LGART sy-vline 
WA_V_T52EL_COMP_STR-SEQNO sy-vline 
WA_V_T52EL_COMP_STR-ENDDA sy-vline 
WA_V_T52EL_COMP_STR-LGTXT sy-vline 
WA_V_T52EL_COMP_STR-SIGN sy-vline 
WA_V_T52EL_COMP_STR-SPPRC sy-vline 
WA_V_T52EL_COMP_STR-SYMKO sy-vline 
WA_V_T52EL_COMP_STR-KOART sy-vline 
WA_V_T52EL_COMP_STR-SYMKOTEXT sy-vline 
WA_V_T52EL_COMP_STR-C1IGN sy-vline      INTO ld_text SEPARATED BY SPACE.

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