ABAP Select data from SAP table KOMPRASPEX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMPRASPEX
*  INTO TABLE @DATA(IT_KOMPRASPEX2).
*--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_KOMPRASPEX INDEX 1 INTO DATA(WA_KOMPRASPEX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMPRASPEX>-TKONN = 1.
<KOMPRASPEX>-TPOSN = 1.
<KOMPRASPEX>-SIDE = 1.
<KOMPRASPEX>-TPOSN_COM = 1.
<KOMPRASPEX>-PR_ASPECT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMPRASPEX-PR_COUNT, sy-vline,
  WA_KOMPRASPEX-OLDPO, sy-vline,
  WA_KOMPRASPEX-OLDTPOSN_COM, sy-vline,
  WA_KOMPRASPEX-OLDPR_COUNT, sy-vline,
  WA_KOMPRASPEX-QUANTITY, sy-vline,
  WA_KOMPRASPEX-UNIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMPRASPEX 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_KOMPRASPEX 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_KOMPRASPEX INTO WA_KOMPRASPEX.


*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.

*Conversion exit ALPHA, internal->external for field TKONN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMPRASPEX-TKONN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMPRASPEX-TKONN.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_KOMPRASPEX_STR, 
TKONN TYPE STRING,
TPOSN TYPE STRING,
SIDE TYPE STRING,
TPOSN_COM TYPE STRING,
PR_ASPECT TYPE STRING,
PR_COUNT TYPE STRING,
OLDPO TYPE STRING,
OLDTPOSN_COM TYPE STRING,
OLDPR_COUNT TYPE STRING,
QUANTITY TYPE STRING,
UNIT TYPE STRING,
PR_DATE TYPE STRING,
KBETR TYPE STRING,
KONWA TYPE STRING,
KPEIN TYPE STRING,
KMEIN TYPE STRING,
KBETR2 TYPE STRING,
KONWA2 TYPE STRING,
KPEIN2 TYPE STRING,
KMEIN2 TYPE STRING,
KBETR3 TYPE STRING,
KONWA3 TYPE STRING,
KPEIN3 TYPE STRING,
KMEIN3 TYPE STRING,
KBETR4 TYPE STRING,
KONWA4 TYPE STRING,
KPEIN4 TYPE STRING,
KMEIN4 TYPE STRING,
FUTURE TYPE STRING,
EXT_REF_PRASP TYPE STRING,
PLACE_HOLDER TYPE STRING,
UPDKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMPRASPEX_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_KOMPRASPEX_STR-TKONN sy-vline 
WA_KOMPRASPEX_STR-TPOSN sy-vline 
WA_KOMPRASPEX_STR-SIDE sy-vline 
WA_KOMPRASPEX_STR-TPOSN_COM sy-vline 
WA_KOMPRASPEX_STR-PR_ASPECT sy-vline 
WA_KOMPRASPEX_STR-PR_COUNT sy-vline 
WA_KOMPRASPEX_STR-OLDPO sy-vline 
WA_KOMPRASPEX_STR-OLDTPOSN_COM sy-vline 
WA_KOMPRASPEX_STR-OLDPR_COUNT sy-vline 
WA_KOMPRASPEX_STR-QUANTITY sy-vline 
WA_KOMPRASPEX_STR-UNIT sy-vline 
WA_KOMPRASPEX_STR-PR_DATE sy-vline 
WA_KOMPRASPEX_STR-KBETR sy-vline 
WA_KOMPRASPEX_STR-KONWA sy-vline 
WA_KOMPRASPEX_STR-KPEIN sy-vline 
WA_KOMPRASPEX_STR-KMEIN sy-vline 
WA_KOMPRASPEX_STR-KBETR2 sy-vline 
WA_KOMPRASPEX_STR-KONWA2 sy-vline 
WA_KOMPRASPEX_STR-KPEIN2 sy-vline 
WA_KOMPRASPEX_STR-KMEIN2 sy-vline 
WA_KOMPRASPEX_STR-KBETR3 sy-vline 
WA_KOMPRASPEX_STR-KONWA3 sy-vline 
WA_KOMPRASPEX_STR-KPEIN3 sy-vline 
WA_KOMPRASPEX_STR-KMEIN3 sy-vline 
WA_KOMPRASPEX_STR-KBETR4 sy-vline 
WA_KOMPRASPEX_STR-KONWA4 sy-vline 
WA_KOMPRASPEX_STR-KPEIN4 sy-vline 
WA_KOMPRASPEX_STR-KMEIN4 sy-vline 
WA_KOMPRASPEX_STR-FUTURE sy-vline 
WA_KOMPRASPEX_STR-EXT_REF_PRASP sy-vline 
WA_KOMPRASPEX_STR-PLACE_HOLDER sy-vline 
WA_KOMPRASPEX_STR-UPDKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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