ABAP Select data from SAP table ATPGD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ATPGD
*  INTO TABLE @DATA(IT_ATPGD2).
*--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_ATPGD INDEX 1 INTO DATA(WA_ATPGD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ATPGD>-OKDBD = 1.
<ATPGD>-PLAUF = 1.
<ATPGD>-AZERG = 1.
<ATPGD>-ANWDG = 1.
<ATPGD>-ANWDG_ORIG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ATPGD-EGSBS, sy-vline,
  WA_ATPGD-PRFLG, sy-vline,
  WA_ATPGD-CHKBTCH, sy-vline,
  WA_ATPGD-CHKSLOC, sy-vline,
  WA_ATPGD-CALLMD, sy-vline,
  WA_ATPGD-RDMOD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ATPGD 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_ATPGD 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_ATPGD INTO WA_ATPGD.


*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_ATPGD_STR, 
OKDBD TYPE STRING,
PLAUF TYPE STRING,
AZERG TYPE STRING,
ANWDG TYPE STRING,
ANWDG_ORIG TYPE STRING,
EGSBS TYPE STRING,
PRFLG TYPE STRING,
CHKBTCH TYPE STRING,
CHKSLOC TYPE STRING,
CALLMD TYPE STRING,
RDMOD TYPE STRING,
ENQUSR TYPE STRING,
XENQMD TYPE STRING,
OPURBD TYPE STRING,
MSGINIT TYPE STRING,
RELIND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ATPGD_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_ATPGD_STR-OKDBD sy-vline 
WA_ATPGD_STR-PLAUF sy-vline 
WA_ATPGD_STR-AZERG sy-vline 
WA_ATPGD_STR-ANWDG sy-vline 
WA_ATPGD_STR-ANWDG_ORIG sy-vline 
WA_ATPGD_STR-EGSBS sy-vline 
WA_ATPGD_STR-PRFLG sy-vline 
WA_ATPGD_STR-CHKBTCH sy-vline 
WA_ATPGD_STR-CHKSLOC sy-vline 
WA_ATPGD_STR-CALLMD sy-vline 
WA_ATPGD_STR-RDMOD sy-vline 
WA_ATPGD_STR-ENQUSR sy-vline 
WA_ATPGD_STR-XENQMD sy-vline 
WA_ATPGD_STR-OPURBD sy-vline 
WA_ATPGD_STR-MSGINIT sy-vline 
WA_ATPGD_STR-RELIND sy-vline      INTO ld_text SEPARATED BY SPACE.

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