ABAP Select data from SAP table P20_ATEES into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P20_ATEES 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 P20_ATEES. 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 P20_ATEES 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_P20_ATEES TYPE STANDARD TABLE OF P20_ATEES,
      WA_P20_ATEES TYPE P20_ATEES,
      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: <P20_ATEES> TYPE P20_ATEES.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P20_ATEES.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P20_ATEES
  INTO TABLE IT_P20_ATEES.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P20_ATEES
*  INTO TABLE @DATA(IT_P20_ATEES2).
*--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_P20_ATEES INDEX 1 INTO DATA(WA_P20_ATEES2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P20_ATEES ASSIGNING <P20_ATEES>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P20_ATEES>-RECAR = 1.
<P20_ATEES>-RECTY = 1.
<P20_ATEES>-ORGNO = 1.
<P20_ATEES>-FDNUM = 1.
<P20_ATEES>-NAME = 1.

ENDLOOP.

LOOP AT IT_P20_ATEES INTO WA_P20_ATEES.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P20_ATEES-STRAS, sy-vline,
  WA_P20_ATEES-PSTLZ, sy-vline,
  WA_P20_ATEES-PSTED, sy-vline,
  WA_P20_ATEES-MUNIC, sy-vline,
  WA_P20_ATEES-AHELA, sy-vline,
  WA_P20_ATEES-BEGDM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P20_ATEES 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_P20_ATEES 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_P20_ATEES INTO WA_P20_ATEES.


*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_P20_ATEES_STR, 
RECAR TYPE STRING,
RECTY TYPE STRING,
ORGNO TYPE STRING,
FDNUM TYPE STRING,
NAME TYPE STRING,
STRAS TYPE STRING,
PSTLZ TYPE STRING,
PSTED TYPE STRING,
MUNIC TYPE STRING,
AHELA TYPE STRING,
BEGDM TYPE STRING,
ENDDM TYPE STRING,
ANT_D TYPE STRING,
KSJOM TYPE STRING,
KENDR TYPE STRING,
FILLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P20_ATEES_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_P20_ATEES_STR-RECAR sy-vline 
WA_P20_ATEES_STR-RECTY sy-vline 
WA_P20_ATEES_STR-ORGNO sy-vline 
WA_P20_ATEES_STR-FDNUM sy-vline 
WA_P20_ATEES_STR-NAME sy-vline 
WA_P20_ATEES_STR-STRAS sy-vline 
WA_P20_ATEES_STR-PSTLZ sy-vline 
WA_P20_ATEES_STR-PSTED sy-vline 
WA_P20_ATEES_STR-MUNIC sy-vline 
WA_P20_ATEES_STR-AHELA sy-vline 
WA_P20_ATEES_STR-BEGDM sy-vline 
WA_P20_ATEES_STR-ENDDM sy-vline 
WA_P20_ATEES_STR-ANT_D sy-vline 
WA_P20_ATEES_STR-KSJOM sy-vline 
WA_P20_ATEES_STR-KENDR sy-vline 
WA_P20_ATEES_STR-FILLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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