ABAP Select data from SAP table PKRPRVWT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PKRPRVWT
*  INTO TABLE @DATA(IT_PKRPRVWT2).
*--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_PKRPRVWT INDEX 1 INTO DATA(WA_PKRPRVWT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PKRPRVWT>-LGA01 = 1.
<PKRPRVWT>-BET01 = 1.
<PKRPRVWT>-LGA02 = 1.
<PKRPRVWT>-BET02 = 1.
<PKRPRVWT>-LGA03 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PKRPRVWT-BET03, sy-vline,
  WA_PKRPRVWT-LGA04, sy-vline,
  WA_PKRPRVWT-BET04, sy-vline,
  WA_PKRPRVWT-LGA05, sy-vline,
  WA_PKRPRVWT-BET05, sy-vline,
  WA_PKRPRVWT-LGA06, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PKRPRVWT 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_PKRPRVWT 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_PKRPRVWT INTO WA_PKRPRVWT.


*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_PKRPRVWT_STR, 
LGA01 TYPE STRING,
BET01 TYPE STRING,
LGA02 TYPE STRING,
BET02 TYPE STRING,
LGA03 TYPE STRING,
BET03 TYPE STRING,
LGA04 TYPE STRING,
BET04 TYPE STRING,
LGA05 TYPE STRING,
BET05 TYPE STRING,
LGA06 TYPE STRING,
BET06 TYPE STRING,
LGA07 TYPE STRING,
BET07 TYPE STRING,
LGA08 TYPE STRING,
BET08 TYPE STRING,
LGA09 TYPE STRING,
BET09 TYPE STRING,
LGA10 TYPE STRING,
BET10 TYPE STRING,
LGA11 TYPE STRING,
BET11 TYPE STRING,
LGA12 TYPE STRING,
BET12 TYPE STRING,
LGA13 TYPE STRING,
BET13 TYPE STRING,
LGA14 TYPE STRING,
BET14 TYPE STRING,
LGA15 TYPE STRING,
BET15 TYPE STRING,
LGA16 TYPE STRING,
BET16 TYPE STRING,
LGA17 TYPE STRING,
BET17 TYPE STRING,
LGA18 TYPE STRING,
BET18 TYPE STRING,
LGA19 TYPE STRING,
BET19 TYPE STRING,
LGA20 TYPE STRING,
BET20 TYPE STRING,
LGA21 TYPE STRING,
BET21 TYPE STRING,
LGA22 TYPE STRING,
BET22 TYPE STRING,
LGA23 TYPE STRING,
BET23 TYPE STRING,
LGA24 TYPE STRING,
BET24 TYPE STRING,
LGA25 TYPE STRING,
BET25 TYPE STRING,
LGA26 TYPE STRING,
BET26 TYPE STRING,
LGA27 TYPE STRING,
BET27 TYPE STRING,
LGA28 TYPE STRING,
BET28 TYPE STRING,
LGA29 TYPE STRING,
BET29 TYPE STRING,
LGA30 TYPE STRING,
BET30 TYPE STRING,
LGA31 TYPE STRING,
BET31 TYPE STRING,
LGA32 TYPE STRING,
BET32 TYPE STRING,
LGA33 TYPE STRING,
BET33 TYPE STRING,
LGA34 TYPE STRING,
BET34 TYPE STRING,
LGA35 TYPE STRING,
BET35 TYPE STRING,
LGA36 TYPE STRING,
BET36 TYPE STRING,
LGA37 TYPE STRING,
BET37 TYPE STRING,
LGA38 TYPE STRING,
BET38 TYPE STRING,
LGA39 TYPE STRING,
BET39 TYPE STRING,
LGA40 TYPE STRING,
BET40 TYPE STRING,
LGA41 TYPE STRING,
BET41 TYPE STRING,
LGA42 TYPE STRING,
BET42 TYPE STRING,
LGA43 TYPE STRING,
BET43 TYPE STRING,
LGA44 TYPE STRING,
BET44 TYPE STRING,
LGA45 TYPE STRING,
BET45 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PKRPRVWT_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_PKRPRVWT_STR-LGA01 sy-vline 
WA_PKRPRVWT_STR-BET01 sy-vline 
WA_PKRPRVWT_STR-LGA02 sy-vline 
WA_PKRPRVWT_STR-BET02 sy-vline 
WA_PKRPRVWT_STR-LGA03 sy-vline 
WA_PKRPRVWT_STR-BET03 sy-vline 
WA_PKRPRVWT_STR-LGA04 sy-vline 
WA_PKRPRVWT_STR-BET04 sy-vline 
WA_PKRPRVWT_STR-LGA05 sy-vline 
WA_PKRPRVWT_STR-BET05 sy-vline 
WA_PKRPRVWT_STR-LGA06 sy-vline 
WA_PKRPRVWT_STR-BET06 sy-vline 
WA_PKRPRVWT_STR-LGA07 sy-vline 
WA_PKRPRVWT_STR-BET07 sy-vline 
WA_PKRPRVWT_STR-LGA08 sy-vline 
WA_PKRPRVWT_STR-BET08 sy-vline 
WA_PKRPRVWT_STR-LGA09 sy-vline 
WA_PKRPRVWT_STR-BET09 sy-vline 
WA_PKRPRVWT_STR-LGA10 sy-vline 
WA_PKRPRVWT_STR-BET10 sy-vline 
WA_PKRPRVWT_STR-LGA11 sy-vline 
WA_PKRPRVWT_STR-BET11 sy-vline 
WA_PKRPRVWT_STR-LGA12 sy-vline 
WA_PKRPRVWT_STR-BET12 sy-vline 
WA_PKRPRVWT_STR-LGA13 sy-vline 
WA_PKRPRVWT_STR-BET13 sy-vline 
WA_PKRPRVWT_STR-LGA14 sy-vline 
WA_PKRPRVWT_STR-BET14 sy-vline 
WA_PKRPRVWT_STR-LGA15 sy-vline 
WA_PKRPRVWT_STR-BET15 sy-vline 
WA_PKRPRVWT_STR-LGA16 sy-vline 
WA_PKRPRVWT_STR-BET16 sy-vline 
WA_PKRPRVWT_STR-LGA17 sy-vline 
WA_PKRPRVWT_STR-BET17 sy-vline 
WA_PKRPRVWT_STR-LGA18 sy-vline 
WA_PKRPRVWT_STR-BET18 sy-vline 
WA_PKRPRVWT_STR-LGA19 sy-vline 
WA_PKRPRVWT_STR-BET19 sy-vline 
WA_PKRPRVWT_STR-LGA20 sy-vline 
WA_PKRPRVWT_STR-BET20 sy-vline 
WA_PKRPRVWT_STR-LGA21 sy-vline 
WA_PKRPRVWT_STR-BET21 sy-vline 
WA_PKRPRVWT_STR-LGA22 sy-vline 
WA_PKRPRVWT_STR-BET22 sy-vline 
WA_PKRPRVWT_STR-LGA23 sy-vline 
WA_PKRPRVWT_STR-BET23 sy-vline 
WA_PKRPRVWT_STR-LGA24 sy-vline 
WA_PKRPRVWT_STR-BET24 sy-vline 
WA_PKRPRVWT_STR-LGA25 sy-vline 
WA_PKRPRVWT_STR-BET25 sy-vline 
WA_PKRPRVWT_STR-LGA26 sy-vline 
WA_PKRPRVWT_STR-BET26 sy-vline 
WA_PKRPRVWT_STR-LGA27 sy-vline 
WA_PKRPRVWT_STR-BET27 sy-vline 
WA_PKRPRVWT_STR-LGA28 sy-vline 
WA_PKRPRVWT_STR-BET28 sy-vline 
WA_PKRPRVWT_STR-LGA29 sy-vline 
WA_PKRPRVWT_STR-BET29 sy-vline 
WA_PKRPRVWT_STR-LGA30 sy-vline 
WA_PKRPRVWT_STR-BET30 sy-vline 
WA_PKRPRVWT_STR-LGA31 sy-vline 
WA_PKRPRVWT_STR-BET31 sy-vline 
WA_PKRPRVWT_STR-LGA32 sy-vline 
WA_PKRPRVWT_STR-BET32 sy-vline 
WA_PKRPRVWT_STR-LGA33 sy-vline 
WA_PKRPRVWT_STR-BET33 sy-vline 
WA_PKRPRVWT_STR-LGA34 sy-vline 
WA_PKRPRVWT_STR-BET34 sy-vline 
WA_PKRPRVWT_STR-LGA35 sy-vline 
WA_PKRPRVWT_STR-BET35 sy-vline 
WA_PKRPRVWT_STR-LGA36 sy-vline 
WA_PKRPRVWT_STR-BET36 sy-vline 
WA_PKRPRVWT_STR-LGA37 sy-vline 
WA_PKRPRVWT_STR-BET37 sy-vline 
WA_PKRPRVWT_STR-LGA38 sy-vline 
WA_PKRPRVWT_STR-BET38 sy-vline 
WA_PKRPRVWT_STR-LGA39 sy-vline 
WA_PKRPRVWT_STR-BET39 sy-vline 
WA_PKRPRVWT_STR-LGA40 sy-vline 
WA_PKRPRVWT_STR-BET40 sy-vline 
WA_PKRPRVWT_STR-LGA41 sy-vline 
WA_PKRPRVWT_STR-BET41 sy-vline 
WA_PKRPRVWT_STR-LGA42 sy-vline 
WA_PKRPRVWT_STR-BET42 sy-vline 
WA_PKRPRVWT_STR-LGA43 sy-vline 
WA_PKRPRVWT_STR-BET43 sy-vline 
WA_PKRPRVWT_STR-LGA44 sy-vline 
WA_PKRPRVWT_STR-BET44 sy-vline 
WA_PKRPRVWT_STR-LGA45 sy-vline 
WA_PKRPRVWT_STR-BET45 sy-vline      INTO ld_text SEPARATED BY SPACE.

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