ABAP Select data from SAP table P03_COMP_L16 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P03_COMP_L16 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 P03_COMP_L16. 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 P03_COMP_L16 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_P03_COMP_L16 TYPE STANDARD TABLE OF P03_COMP_L16,
      WA_P03_COMP_L16 TYPE P03_COMP_L16,
      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: <P03_COMP_L16> TYPE P03_COMP_L16.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P03_COMP_L16.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P03_COMP_L16
  INTO TABLE IT_P03_COMP_L16.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P03_COMP_L16
*  INTO TABLE @DATA(IT_P03_COMP_L162).
*--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_P03_COMP_L16 INDEX 1 INTO DATA(WA_P03_COMP_L162).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P03_COMP_L16 ASSIGNING <P03_COMP_L16>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P03_COMP_L16>-AUSVL = 1.
<P03_COMP_L16>-AUSVG = 1.
<P03_COMP_L16>-ANTIT = 1.
<P03_COMP_L16>-GESCH = 1.
<P03_COMP_L16>-ANADR = 1.

ENDLOOP.

LOOP AT IT_P03_COMP_L16 INTO WA_P03_COMP_L16.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P03_COMP_L16-ANLKZ, sy-vline,
  WA_P03_COMP_L16-ANPLZ, sy-vline,
  WA_P03_COMP_L16-ANORT, sy-vline,
  WA_P03_COMP_L16-LOHNB, sy-vline,
  WA_P03_COMP_L16-AGNUM, sy-vline,
  WA_P03_COMP_L16-AGFZA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P03_COMP_L16 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_P03_COMP_L16 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_P03_COMP_L16 INTO WA_P03_COMP_L16.


*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_P03_COMP_L16_STR, 
AUSVL TYPE STRING,
AUSVG TYPE STRING,
ANTIT TYPE STRING,
GESCH TYPE STRING,
ANADR TYPE STRING,
ANLKZ TYPE STRING,
ANPLZ TYPE STRING,
ANORT TYPE STRING,
LOHNB TYPE STRING,
AGNUM TYPE STRING,
AGFZA TYPE STRING,
AGDVR TYPE STRING,
AGNAM TYPE STRING,
AGTIT TYPE STRING,
AGADR TYPE STRING,
AGLKZ TYPE STRING,
AGZIP TYPE STRING,
AGORT TYPE STRING,
LVNUM TYPE STRING,
LVFZA TYPE STRING,
LVDVR TYPE STRING,
ARTL0 TYPE STRING,
UDV16 TYPE STRING,
SOZSL TYPE STRING,
SOZSA TYPE STRING,
SOZS2 TYPE STRING,
SOZS0 TYPE STRING,
TVOLL TYPE STRING,
TTEIL TYPE STRING,
KVOLL TYPE STRING,
KAVAB TYPE STRING,
KAEAB TYPE STRING,
STAKD TYPE STRING,
PASVL TYPE STRING,
PASVG TYPE STRING,
STBDT TYPE STRING,
PGVON TYPE STRING,
PGBIS TYPE STRING,
SEUVR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P03_COMP_L16_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_P03_COMP_L16_STR-AUSVL sy-vline 
WA_P03_COMP_L16_STR-AUSVG sy-vline 
WA_P03_COMP_L16_STR-ANTIT sy-vline 
WA_P03_COMP_L16_STR-GESCH sy-vline 
WA_P03_COMP_L16_STR-ANADR sy-vline 
WA_P03_COMP_L16_STR-ANLKZ sy-vline 
WA_P03_COMP_L16_STR-ANPLZ sy-vline 
WA_P03_COMP_L16_STR-ANORT sy-vline 
WA_P03_COMP_L16_STR-LOHNB sy-vline 
WA_P03_COMP_L16_STR-AGNUM sy-vline 
WA_P03_COMP_L16_STR-AGFZA sy-vline 
WA_P03_COMP_L16_STR-AGDVR sy-vline 
WA_P03_COMP_L16_STR-AGNAM sy-vline 
WA_P03_COMP_L16_STR-AGTIT sy-vline 
WA_P03_COMP_L16_STR-AGADR sy-vline 
WA_P03_COMP_L16_STR-AGLKZ sy-vline 
WA_P03_COMP_L16_STR-AGZIP sy-vline 
WA_P03_COMP_L16_STR-AGORT sy-vline 
WA_P03_COMP_L16_STR-LVNUM sy-vline 
WA_P03_COMP_L16_STR-LVFZA sy-vline 
WA_P03_COMP_L16_STR-LVDVR sy-vline 
WA_P03_COMP_L16_STR-ARTL0 sy-vline 
WA_P03_COMP_L16_STR-UDV16 sy-vline 
WA_P03_COMP_L16_STR-SOZSL sy-vline 
WA_P03_COMP_L16_STR-SOZSA sy-vline 
WA_P03_COMP_L16_STR-SOZS2 sy-vline 
WA_P03_COMP_L16_STR-SOZS0 sy-vline 
WA_P03_COMP_L16_STR-TVOLL sy-vline 
WA_P03_COMP_L16_STR-TTEIL sy-vline 
WA_P03_COMP_L16_STR-KVOLL sy-vline 
WA_P03_COMP_L16_STR-KAVAB sy-vline 
WA_P03_COMP_L16_STR-KAEAB sy-vline 
WA_P03_COMP_L16_STR-STAKD sy-vline 
WA_P03_COMP_L16_STR-PASVL sy-vline 
WA_P03_COMP_L16_STR-PASVG sy-vline 
WA_P03_COMP_L16_STR-STBDT sy-vline 
WA_P03_COMP_L16_STR-PGVON sy-vline 
WA_P03_COMP_L16_STR-PGBIS sy-vline 
WA_P03_COMP_L16_STR-SEUVR sy-vline      INTO ld_text SEPARATED BY SPACE.

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