ABAP Select data from SAP table PKRAPP04 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PKRAPP04 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 PKRAPP04. 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 PKRAPP04 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_PKRAPP04 TYPE STANDARD TABLE OF PKRAPP04,
      WA_PKRAPP04 TYPE PKRAPP04,
      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: <PKRAPP04> TYPE PKRAPP04.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PKRAPP04.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PKRAPP04
  INTO TABLE IT_PKRAPP04.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PKRAPP04
*  INTO TABLE @DATA(IT_PKRAPP042).
*--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_PKRAPP04 INDEX 1 INTO DATA(WA_PKRAPP042).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PKRAPP04 ASSIGNING <PKRAPP04>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PKRAPP04>-HSINS = 1.
<PKRAPP04>-HSSAV = 1.
<PKRAPP04>-EEHSS = 1.
<PKRAPP04>-LHSSV = 1.
<PKRAPP04>-DON30 = 1.

ENDLOOP.

LOOP AT IT_PKRAPP04 INTO WA_PKRAPP04.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PKRAPP04-POLDN, sy-vline,
  WA_PKRAPP04-CONMA, sy-vline,
  WA_PKRAPP04-CONRE, sy-vline,
  WA_PKRAPP04-CONFU, sy-vline,
  WA_PKRAPP04-CRDDP, sy-vline,
  WA_PKRAPP04-GIROE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PKRAPP04 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_PKRAPP04 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_PKRAPP04 INTO WA_PKRAPP04.


*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_PKRAPP04_STR, 
HSINS TYPE STRING,
HSSAV TYPE STRING,
EEHSS TYPE STRING,
LHSSV TYPE STRING,
DON30 TYPE STRING,
POLDN TYPE STRING,
CONMA TYPE STRING,
CONRE TYPE STRING,
CONFU TYPE STRING,
CRDDP TYPE STRING,
GIROE TYPE STRING,
CASHE TYPE STRING,
FORCT TYPE STRING,
FORCK TYPE STRING,
INTTL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PKRAPP04_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_PKRAPP04_STR-HSINS sy-vline 
WA_PKRAPP04_STR-HSSAV sy-vline 
WA_PKRAPP04_STR-EEHSS sy-vline 
WA_PKRAPP04_STR-LHSSV sy-vline 
WA_PKRAPP04_STR-DON30 sy-vline 
WA_PKRAPP04_STR-POLDN sy-vline 
WA_PKRAPP04_STR-CONMA sy-vline 
WA_PKRAPP04_STR-CONRE sy-vline 
WA_PKRAPP04_STR-CONFU sy-vline 
WA_PKRAPP04_STR-CRDDP sy-vline 
WA_PKRAPP04_STR-GIROE sy-vline 
WA_PKRAPP04_STR-CASHE sy-vline 
WA_PKRAPP04_STR-FORCT sy-vline 
WA_PKRAPP04_STR-FORCK sy-vline 
WA_PKRAPP04_STR-INTTL sy-vline      INTO ld_text SEPARATED BY SPACE.

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