ABAP Select data from SAP table PSK2W into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PSK2W 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 PSK2W. 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 PSK2W 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_PSK2W TYPE STANDARD TABLE OF PSK2W,
      WA_PSK2W TYPE PSK2W,
      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: <PSK2W> TYPE PSK2W.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PSK2W.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PSK2W
  INTO TABLE IT_PSK2W.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PSK2W
*  INTO TABLE @DATA(IT_PSK2W2).
*--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_PSK2W INDEX 1 INTO DATA(WA_PSK2W2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PSK2W ASSIGNING <PSK2W>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PSK2W>-CNTR1 = 1.
<PSK2W>-BEGDA = 1.
<PSK2W>-ENDDA = 1.
<PSK2W>-JUPER = 1.
<PSK2W>-KVKZ1 = 1.

ENDLOOP.

LOOP AT IT_PSK2W INTO WA_PSK2W.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PSK2W-RVKZ1, sy-vline,
  WA_PSK2W-AVKZ1, sy-vline,
  WA_PSK2W-RVNUM, sy-vline,
  WA_PSK2W-KVSFR, sy-vline,
  WA_PSK2W-KVGST, sy-vline,
  WA_PSK2W-KVBKL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PSK2W 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_PSK2W 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_PSK2W INTO WA_PSK2W.


*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_PSK2W_STR, 
CNTR1 TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
JUPER TYPE STRING,
KVKZ1 TYPE STRING,
RVKZ1 TYPE STRING,
AVKZ1 TYPE STRING,
RVNUM TYPE STRING,
KVSFR TYPE STRING,
KVGST TYPE STRING,
KVBKL TYPE STRING,
KVFBT TYPE STRING,
ZUSKA TYPE STRING,
SONKV TYPE STRING,
SONRV TYPE STRING,
SONAV TYPE STRING,
SELKV TYPE STRING,
SELRV TYPE STRING,
MITNR TYPE STRING,
MAXKV TYPE STRING,
KVBAT TYPE STRING,
RVBAT TYPE STRING,
AVBAT TYPE STRING,
SVA01 TYPE STRING,
SVA02 TYPE STRING,
SVA03 TYPE STRING,
SVA04 TYPE STRING,
SVA05 TYPE STRING,
SVA06 TYPE STRING,
SVA07 TYPE STRING,
SVA08 TYPE STRING,
PVKZ1 TYPE STRING,
PZODP TYPE STRING,
TYZEC TYPE STRING,
PRIJMSP TYPE STRING,
ODPZP TYPE STRING,
AURTR TYPE STRING,
RBGDA TYPE STRING,
RZHSP TYPE STRING,
VSTSP TYPE STRING,
VNMSP TYPE STRING,
ACTSP TYPE STRING,
BEGSP TYPE STRING,
ENDSP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PSK2W_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_PSK2W_STR-CNTR1 sy-vline 
WA_PSK2W_STR-BEGDA sy-vline 
WA_PSK2W_STR-ENDDA sy-vline 
WA_PSK2W_STR-JUPER sy-vline 
WA_PSK2W_STR-KVKZ1 sy-vline 
WA_PSK2W_STR-RVKZ1 sy-vline 
WA_PSK2W_STR-AVKZ1 sy-vline 
WA_PSK2W_STR-RVNUM sy-vline 
WA_PSK2W_STR-KVSFR sy-vline 
WA_PSK2W_STR-KVGST sy-vline 
WA_PSK2W_STR-KVBKL sy-vline 
WA_PSK2W_STR-KVFBT sy-vline 
WA_PSK2W_STR-ZUSKA sy-vline 
WA_PSK2W_STR-SONKV sy-vline 
WA_PSK2W_STR-SONRV sy-vline 
WA_PSK2W_STR-SONAV sy-vline 
WA_PSK2W_STR-SELKV sy-vline 
WA_PSK2W_STR-SELRV sy-vline 
WA_PSK2W_STR-MITNR sy-vline 
WA_PSK2W_STR-MAXKV sy-vline 
WA_PSK2W_STR-KVBAT sy-vline 
WA_PSK2W_STR-RVBAT sy-vline 
WA_PSK2W_STR-AVBAT sy-vline 
WA_PSK2W_STR-SVA01 sy-vline 
WA_PSK2W_STR-SVA02 sy-vline 
WA_PSK2W_STR-SVA03 sy-vline 
WA_PSK2W_STR-SVA04 sy-vline 
WA_PSK2W_STR-SVA05 sy-vline 
WA_PSK2W_STR-SVA06 sy-vline 
WA_PSK2W_STR-SVA07 sy-vline 
WA_PSK2W_STR-SVA08 sy-vline 
WA_PSK2W_STR-PVKZ1 sy-vline 
WA_PSK2W_STR-PZODP sy-vline 
WA_PSK2W_STR-TYZEC sy-vline 
WA_PSK2W_STR-PRIJMSP sy-vline 
WA_PSK2W_STR-ODPZP sy-vline 
WA_PSK2W_STR-AURTR sy-vline 
WA_PSK2W_STR-RBGDA sy-vline 
WA_PSK2W_STR-RZHSP sy-vline 
WA_PSK2W_STR-VSTSP sy-vline 
WA_PSK2W_STR-VNMSP sy-vline 
WA_PSK2W_STR-ACTSP sy-vline 
WA_PSK2W_STR-BEGSP sy-vline 
WA_PSK2W_STR-ENDSP sy-vline      INTO ld_text SEPARATED BY SPACE.

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