ABAP Select data from SAP table QDPA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QDPA
*  INTO TABLE @DATA(IT_QDPA2).
*--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_QDPA INDEX 1 INTO DATA(WA_QDPA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QDPA>-MANDT = 1.
<QDPA>-STPRPLAN = 1.
<QDPA>-ZAEHLPOS = 1.
<QDPA>-PRSCHAERFE = 1.
<QDPA>-ZAEHLANW = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QDPA-LOSUMF, sy-vline,
  WA_QDPA-LOSUMFNI, sy-vline,
  WA_QDPA-STPRUMF, sy-vline,
  WA_QDPA-STPRANZ, sy-vline,
  WA_QDPA-ANNAHMEZ, sy-vline,
  WA_QDPA-RUECKWEZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QDPA 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_QDPA 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_QDPA INTO WA_QDPA.


*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_QDPA_STR, 
MANDT TYPE STRING,
STPRPLAN TYPE STRING,
ZAEHLPOS TYPE STRING,
PRSCHAERFE TYPE STRING,
ZAEHLANW TYPE STRING,
LOSUMF TYPE STRING,
LOSUMFNI TYPE STRING,
STPRUMF TYPE STRING,
STPRANZ TYPE STRING,
ANNAHMEZ TYPE STRING,
RUECKWEZ TYPE STRING,
ANNAHMEZ2 TYPE STRING,
RUECKWEZ2 TYPE STRING,
ANNAHMEZ3 TYPE STRING,
RUECKWEZ3 TYPE STRING,
ANNAHMEZ4 TYPE STRING,
RUECKWEZ4 TYPE STRING,
ANNAHMEZ5 TYPE STRING,
RUECKWEZ5 TYPE STRING,
ANNAHMEZ6 TYPE STRING,
RUECKWEZ6 TYPE STRING,
ANNAHMEZ7 TYPE STRING,
RUECKWEZ7 TYPE STRING,
KFAKTOR TYPE STRING,
KFAKTORNI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QDPA_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_QDPA_STR-MANDT sy-vline 
WA_QDPA_STR-STPRPLAN sy-vline 
WA_QDPA_STR-ZAEHLPOS sy-vline 
WA_QDPA_STR-PRSCHAERFE sy-vline 
WA_QDPA_STR-ZAEHLANW sy-vline 
WA_QDPA_STR-LOSUMF sy-vline 
WA_QDPA_STR-LOSUMFNI sy-vline 
WA_QDPA_STR-STPRUMF sy-vline 
WA_QDPA_STR-STPRANZ sy-vline 
WA_QDPA_STR-ANNAHMEZ sy-vline 
WA_QDPA_STR-RUECKWEZ sy-vline 
WA_QDPA_STR-ANNAHMEZ2 sy-vline 
WA_QDPA_STR-RUECKWEZ2 sy-vline 
WA_QDPA_STR-ANNAHMEZ3 sy-vline 
WA_QDPA_STR-RUECKWEZ3 sy-vline 
WA_QDPA_STR-ANNAHMEZ4 sy-vline 
WA_QDPA_STR-RUECKWEZ4 sy-vline 
WA_QDPA_STR-ANNAHMEZ5 sy-vline 
WA_QDPA_STR-RUECKWEZ5 sy-vline 
WA_QDPA_STR-ANNAHMEZ6 sy-vline 
WA_QDPA_STR-RUECKWEZ6 sy-vline 
WA_QDPA_STR-ANNAHMEZ7 sy-vline 
WA_QDPA_STR-RUECKWEZ7 sy-vline 
WA_QDPA_STR-KFAKTOR sy-vline 
WA_QDPA_STR-KFAKTORNI sy-vline      INTO ld_text SEPARATED BY SPACE.

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