ABAP Select data from SAP table ATPDS into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ATPDS
*  INTO TABLE @DATA(IT_ATPDS2).
*--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_ATPDS INDEX 1 INTO DATA(WA_ATPDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ATPDS>-ATPAB = 1.
<ATPDS>-ATPNR = 1.
<ATPDS>-DELNR = 1.
<ATPDS>-DELPS = 1.
<ATPDS>-DELET = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ATPDS-DEL12, sy-vline,
  WA_ATPDS-TAG00, sy-vline,
  WA_ATPDS-SORT1, sy-vline,
  WA_ATPDS-SORT2, sy-vline,
  WA_ATPDS-DELKZ, sy-vline,
  WA_ATPDS-DAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ATPDS 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_ATPDS 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_ATPDS INTO WA_ATPDS.


*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 MATN1, internal->external for field BAUGR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ATPDS-BAUGR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ATPDS-BAUGR.
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_ATPDS_STR, 
ATPAB TYPE STRING,
ATPNR TYPE STRING,
DELNR TYPE STRING,
DELPS TYPE STRING,
DELET TYPE STRING,
DEL12 TYPE STRING,
TAG00 TYPE STRING,
SORT1 TYPE STRING,
SORT2 TYPE STRING,
DELKZ TYPE STRING,
DAT TYPE STRING,
QTY TYPE STRING,
XLINE TYPE STRING,
SGT_CATV TYPE STRING,
QTY_O TYPE STRING,
QTY_C TYPE STRING,
BAUGR TYPE STRING,
EWERK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ATPDS_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_ATPDS_STR-ATPAB sy-vline 
WA_ATPDS_STR-ATPNR sy-vline 
WA_ATPDS_STR-DELNR sy-vline 
WA_ATPDS_STR-DELPS sy-vline 
WA_ATPDS_STR-DELET sy-vline 
WA_ATPDS_STR-DEL12 sy-vline 
WA_ATPDS_STR-TAG00 sy-vline 
WA_ATPDS_STR-SORT1 sy-vline 
WA_ATPDS_STR-SORT2 sy-vline 
WA_ATPDS_STR-DELKZ sy-vline 
WA_ATPDS_STR-DAT sy-vline 
WA_ATPDS_STR-QTY sy-vline 
WA_ATPDS_STR-XLINE sy-vline 
WA_ATPDS_STR-SGT_CATV sy-vline 
WA_ATPDS_STR-QTY_O sy-vline 
WA_ATPDS_STR-QTY_C sy-vline 
WA_ATPDS_STR-BAUGR sy-vline 
WA_ATPDS_STR-EWERK sy-vline      INTO ld_text SEPARATED BY SPACE.

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