ABAP Select data from SAP table DAN_PPOIX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DAN_PPOIX
*  INTO TABLE @DATA(IT_DAN_PPOIX2).
*--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_DAN_PPOIX INDEX 1 INTO DATA(WA_DAN_PPOIX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DAN_PPOIX>-TSLIN = 1.
<DAN_PPOIX>-PERNR = 1.
<DAN_PPOIX>-SEQNO = 1.
<DAN_PPOIX>-FPPER = 1.
<DAN_PPOIX>-INPER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DAN_PPOIX-ACTSIGN, sy-vline,
  WA_DAN_PPOIX-KOART, sy-vline,
  WA_DAN_PPOIX-MOMAG, sy-vline,
  WA_DAN_PPOIX-KOMOK, sy-vline,
  WA_DAN_PPOIX-MCODE, sy-vline,
  WA_DAN_PPOIX-LGART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DAN_PPOIX 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_DAN_PPOIX 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_DAN_PPOIX INTO WA_DAN_PPOIX.


*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 CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DAN_PPOIX-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DAN_PPOIX-MEINS.
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_DAN_PPOIX_STR, 
TSLIN TYPE STRING,
PERNR TYPE STRING,
SEQNO TYPE STRING,
FPPER TYPE STRING,
INPER TYPE STRING,
ACTSIGN TYPE STRING,
KOART TYPE STRING,
MOMAG TYPE STRING,
KOMOK TYPE STRING,
MCODE TYPE STRING,
LGART TYPE STRING,
SPPRC TYPE STRING,
ANZHL TYPE STRING,
MEINS TYPE STRING,
BETRG TYPE STRING,
WAERS TYPE STRING,
AUART TYPE STRING,
NOFIN TYPE STRING,
SWPER TYPE STRING,
RTLINE TYPE STRING,
WPBPREF TYPE STRING,
C0REF TYPE STRING,
C1REF TYPE STRING,
FUNDREF TYPE STRING,
BETRG_S TYPE STRING,
BETRG_H TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DAN_PPOIX_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_DAN_PPOIX_STR-TSLIN sy-vline 
WA_DAN_PPOIX_STR-PERNR sy-vline 
WA_DAN_PPOIX_STR-SEQNO sy-vline 
WA_DAN_PPOIX_STR-FPPER sy-vline 
WA_DAN_PPOIX_STR-INPER sy-vline 
WA_DAN_PPOIX_STR-ACTSIGN sy-vline 
WA_DAN_PPOIX_STR-KOART sy-vline 
WA_DAN_PPOIX_STR-MOMAG sy-vline 
WA_DAN_PPOIX_STR-KOMOK sy-vline 
WA_DAN_PPOIX_STR-MCODE sy-vline 
WA_DAN_PPOIX_STR-LGART sy-vline 
WA_DAN_PPOIX_STR-SPPRC sy-vline 
WA_DAN_PPOIX_STR-ANZHL sy-vline 
WA_DAN_PPOIX_STR-MEINS sy-vline 
WA_DAN_PPOIX_STR-BETRG sy-vline 
WA_DAN_PPOIX_STR-WAERS sy-vline 
WA_DAN_PPOIX_STR-AUART sy-vline 
WA_DAN_PPOIX_STR-NOFIN sy-vline 
WA_DAN_PPOIX_STR-SWPER sy-vline 
WA_DAN_PPOIX_STR-RTLINE sy-vline 
WA_DAN_PPOIX_STR-WPBPREF sy-vline 
WA_DAN_PPOIX_STR-C0REF sy-vline 
WA_DAN_PPOIX_STR-C1REF sy-vline 
WA_DAN_PPOIX_STR-FUNDREF sy-vline 
WA_DAN_PPOIX_STR-BETRG_S sy-vline 
WA_DAN_PPOIX_STR-BETRG_H sy-vline      INTO ld_text SEPARATED BY SPACE.

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