ABAP Select data from SAP table RK70P2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RK70P2 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 RK70P2. 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 RK70P2 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_RK70P2 TYPE STANDARD TABLE OF RK70P2,
      WA_RK70P2 TYPE RK70P2,
      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: <RK70P2> TYPE RK70P2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RK70P2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RK70P2
  INTO TABLE IT_RK70P2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RK70P2
*  INTO TABLE @DATA(IT_RK70P22).
*--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_RK70P2 INDEX 1 INTO DATA(WA_RK70P22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RK70P2 ASSIGNING <RK70P2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RK70P2>-POSNR = 1.
<RK70P2>-TYPPS = 1.
<RK70P2>-UFIELD_MODE = 1.
<RK70P2>-UKALN = 1.
<RK70P2>-UKALKA = 1.

ENDLOOP.

LOOP AT IT_RK70P2 INTO WA_RK70P2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RK70P2-UKADKY, sy-vline,
  WA_RK70P2-UTVERS, sy-vline,
  WA_RK70P2-UBWVAR, sy-vline,
  WA_RK70P2-USTRAT, sy-vline,
  WA_RK70P2-BAUGR, sy-vline,
  WA_RK70P2-FEHLKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RK70P2 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_RK70P2 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_RK70P2 INTO WA_RK70P2.


*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_RK70P2_STR, 
POSNR TYPE STRING,
TYPPS TYPE STRING,
UFIELD_MODE TYPE STRING,
UKALN TYPE STRING,
UKALKA TYPE STRING,
UKADKY TYPE STRING,
UTVERS TYPE STRING,
UBWVAR TYPE STRING,
USTRAT TYPE STRING,
BAUGR TYPE STRING,
FEHLKZ TYPE STRING,
STRAT TYPE STRING,
SUBSTRAT TYPE STRING,
STRAT_M TYPE STRING,
STRAT_E TYPE STRING,
STRAT_F TYPE STRING,
STRAT_L TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RK70P2_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_RK70P2_STR-POSNR sy-vline 
WA_RK70P2_STR-TYPPS sy-vline 
WA_RK70P2_STR-UFIELD_MODE sy-vline 
WA_RK70P2_STR-UKALN sy-vline 
WA_RK70P2_STR-UKALKA sy-vline 
WA_RK70P2_STR-UKADKY sy-vline 
WA_RK70P2_STR-UTVERS sy-vline 
WA_RK70P2_STR-UBWVAR sy-vline 
WA_RK70P2_STR-USTRAT sy-vline 
WA_RK70P2_STR-BAUGR sy-vline 
WA_RK70P2_STR-FEHLKZ sy-vline 
WA_RK70P2_STR-STRAT sy-vline 
WA_RK70P2_STR-SUBSTRAT sy-vline 
WA_RK70P2_STR-STRAT_M sy-vline 
WA_RK70P2_STR-STRAT_E sy-vline 
WA_RK70P2_STR-STRAT_F sy-vline 
WA_RK70P2_STR-STRAT_L sy-vline      INTO ld_text SEPARATED BY SPACE.

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