ABAP Select data from SAP table PKSB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PKSB
*  INTO TABLE @DATA(IT_PKSB2).
*--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_PKSB INDEX 1 INTO DATA(WA_PKSB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PKSB>-WERKS = 1.
<PKSB>-LGORT = 1.
<PKSB>-PRVBE = 1.
<PKSB>-BDTER = 1.
<PKSB>-BDMNG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PKSB-ENMNG, sy-vline,
  WA_PKSB-SBTER, sy-vline,
  WA_PKSB-VERTI, sy-vline,
  WA_PKSB-SHKZG, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_PKSB 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_PKSB 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_PKSB INTO WA_PKSB.


*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_PKSB_STR, 
WERKS TYPE STRING,
LGORT TYPE STRING,
PRVBE TYPE STRING,
BDTER TYPE STRING,
BDMNG TYPE STRING,
ENMNG TYPE STRING,
SBTER TYPE STRING,
VERTI TYPE STRING,
SHKZG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PKSB_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_PKSB_STR-WERKS sy-vline 
WA_PKSB_STR-LGORT sy-vline 
WA_PKSB_STR-PRVBE sy-vline 
WA_PKSB_STR-BDTER sy-vline 
WA_PKSB_STR-BDMNG sy-vline 
WA_PKSB_STR-ENMNG sy-vline 
WA_PKSB_STR-SBTER sy-vline 
WA_PKSB_STR-VERTI sy-vline 
WA_PKSB_STR-SHKZG sy-vline      INTO ld_text SEPARATED BY SPACE.

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