ABAP Select data from SAP table PUN_DS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PUN_DS
*  INTO TABLE @DATA(IT_PUN_DS2).
*--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_PUN_DS INDEX 1 INTO DATA(WA_PUN_DS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PUN_DS>-ENDDA = 1.
<PUN_DS>-BEGDA = 1.
<PUN_DS>-STAT2 = 1.
<PUN_DS>-WERKS = 1.
<PUN_DS>-BTRTL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PUN_DS-DSTAT, sy-vline,
  WA_PUN_DS-DSCAT, sy-vline,
  WA_PUN_DS-DSCAM, sy-vline,
  WA_PUN_DS-EXT_PREAS, sy-vline,
  WA_PUN_DS-EXT_WERKS, sy-vline,
  WA_PUN_DS-EXT_BTRTL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PUN_DS 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_PUN_DS 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_PUN_DS INTO WA_PUN_DS.


*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_PUN_DS_STR, 
ENDDA TYPE STRING,
BEGDA TYPE STRING,
STAT2 TYPE STRING,
WERKS TYPE STRING,
BTRTL TYPE STRING,
DSTAT TYPE STRING,
DSCAT TYPE STRING,
DSCAM TYPE STRING,
EXT_PREAS TYPE STRING,
EXT_WERKS TYPE STRING,
EXT_BTRTL TYPE STRING,
EXT_DSTAT TYPE STRING,
EXT_DSCAT TYPE STRING,
DSEOD TYPE STRING,
DSEND TYPE STRING,
MOGED TYPE STRING,
MORED TYPE STRING,
MOEXD TYPE STRING,
RERED TYPE STRING,
EGDDS TYPE STRING,
EGASH TYPE STRING,
DSSCL TYPE STRING,
DSNFI TYPE STRING,
DSAPA TYPE STRING,
DSAFI TYPE STRING,
DSESI TYPE STRING,
HAZRC TYPE STRING,
APA_DSSCL TYPE STRING,
APA_DSNFI TYPE STRING,
APA_DSAFI TYPE STRING,
APA_DSESI TYPE STRING,
DSTDY TYPE STRING,
DSROC TYPE STRING,
DSARR TYPE STRING,
DSAPR TYPE STRING,
DSALD TYPE STRING,
DSRGC TYPE STRING,
DSHML TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PUN_DS_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_PUN_DS_STR-ENDDA sy-vline 
WA_PUN_DS_STR-BEGDA sy-vline 
WA_PUN_DS_STR-STAT2 sy-vline 
WA_PUN_DS_STR-WERKS sy-vline 
WA_PUN_DS_STR-BTRTL sy-vline 
WA_PUN_DS_STR-DSTAT sy-vline 
WA_PUN_DS_STR-DSCAT sy-vline 
WA_PUN_DS_STR-DSCAM sy-vline 
WA_PUN_DS_STR-EXT_PREAS sy-vline 
WA_PUN_DS_STR-EXT_WERKS sy-vline 
WA_PUN_DS_STR-EXT_BTRTL sy-vline 
WA_PUN_DS_STR-EXT_DSTAT sy-vline 
WA_PUN_DS_STR-EXT_DSCAT sy-vline 
WA_PUN_DS_STR-DSEOD sy-vline 
WA_PUN_DS_STR-DSEND sy-vline 
WA_PUN_DS_STR-MOGED sy-vline 
WA_PUN_DS_STR-MORED sy-vline 
WA_PUN_DS_STR-MOEXD sy-vline 
WA_PUN_DS_STR-RERED sy-vline 
WA_PUN_DS_STR-EGDDS sy-vline 
WA_PUN_DS_STR-EGASH sy-vline 
WA_PUN_DS_STR-DSSCL sy-vline 
WA_PUN_DS_STR-DSNFI sy-vline 
WA_PUN_DS_STR-DSAPA sy-vline 
WA_PUN_DS_STR-DSAFI sy-vline 
WA_PUN_DS_STR-DSESI sy-vline 
WA_PUN_DS_STR-HAZRC sy-vline 
WA_PUN_DS_STR-APA_DSSCL sy-vline 
WA_PUN_DS_STR-APA_DSNFI sy-vline 
WA_PUN_DS_STR-APA_DSAFI sy-vline 
WA_PUN_DS_STR-APA_DSESI sy-vline 
WA_PUN_DS_STR-DSTDY sy-vline 
WA_PUN_DS_STR-DSROC sy-vline 
WA_PUN_DS_STR-DSARR sy-vline 
WA_PUN_DS_STR-DSAPR sy-vline 
WA_PUN_DS_STR-DSALD sy-vline 
WA_PUN_DS_STR-DSRGC sy-vline 
WA_PUN_DS_STR-DSHML sy-vline      INTO ld_text SEPARATED BY SPACE.

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