ABAP Select data from SAP table QPK1AC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP QPK1AC 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 QPK1AC. 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 QPK1AC 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_QPK1AC TYPE STANDARD TABLE OF QPK1AC,
      WA_QPK1AC TYPE QPK1AC,
      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: <QPK1AC> TYPE QPK1AC.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_QPK1AC.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM QPK1AC
  INTO TABLE IT_QPK1AC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QPK1AC
*  INTO TABLE @DATA(IT_QPK1AC2).
*--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_QPK1AC INDEX 1 INTO DATA(WA_QPK1AC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_QPK1AC ASSIGNING <QPK1AC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QPK1AC>-MANDT = 1.
<QPK1AC>-WERKS = 1.
<QPK1AC>-KATALOGART = 1.
<QPK1AC>-AUSWAHLMGE = 1.
<QPK1AC>-CODEGRUPPE = 1.

ENDLOOP.

LOOP AT IT_QPK1AC INTO WA_QPK1AC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QPK1AC-CODE, sy-vline,
  WA_QPK1AC-VERSIONAM, sy-vline,
  WA_QPK1AC-GUELTIGAB, sy-vline,
  WA_QPK1AC-VERSIONCD, sy-vline,
  WA_QPK1AC-MASSNAHME, sy-vline,
  WA_QPK1AC-LTEXTMASSV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QPK1AC 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_QPK1AC 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_QPK1AC INTO WA_QPK1AC.


*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 VERSIONAM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QPK1AC-VERSIONAM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QPK1AC-VERSIONAM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VERSIONCD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QPK1AC-VERSIONCD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QPK1AC-VERSIONCD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRACHE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_QPK1AC-SPRACHE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QPK1AC-SPRACHE.
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_QPK1AC_STR, 
MANDT TYPE STRING,
WERKS TYPE STRING,
KATALOGART TYPE STRING,
AUSWAHLMGE TYPE STRING,
CODEGRUPPE TYPE STRING,
CODE TYPE STRING,
VERSIONAM TYPE STRING,
GUELTIGAB TYPE STRING,
VERSIONCD TYPE STRING,
MASSNAHME TYPE STRING,
LTEXTMASSV TYPE STRING,
AUSWIRKUNG TYPE STRING,
LTEXTAUSWV TYPE STRING,
BEWERTUNG TYPE STRING,
FEHLKLASSE TYPE STRING,
WAEHRUNG TYPE STRING,
FKOSTEN TYPE STRING,
MUSSTEXTKZ TYPE STRING,
AENDERKZ TYPE STRING,
ERSTELLER TYPE STRING,
E_DATUM TYPE STRING,
AENDERER TYPE STRING,
A_DATUM TYPE STRING,
GELOESCHT TYPE STRING,
QKENNZAHL TYPE STRING,
FOLGEAKTI TYPE STRING,
BB_VORSCH TYPE STRING,
BB_DUNKEL TYPE STRING,
FELDNAME TYPE STRING,
KURZTEXTCD TYPE STRING,
LTEXTCD TYPE STRING,
KURZTEXTGR TYPE STRING,
LTEXTGR TYPE STRING,
SPRACHE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QPK1AC_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_QPK1AC_STR-MANDT sy-vline 
WA_QPK1AC_STR-WERKS sy-vline 
WA_QPK1AC_STR-KATALOGART sy-vline 
WA_QPK1AC_STR-AUSWAHLMGE sy-vline 
WA_QPK1AC_STR-CODEGRUPPE sy-vline 
WA_QPK1AC_STR-CODE sy-vline 
WA_QPK1AC_STR-VERSIONAM sy-vline 
WA_QPK1AC_STR-GUELTIGAB sy-vline 
WA_QPK1AC_STR-VERSIONCD sy-vline 
WA_QPK1AC_STR-MASSNAHME sy-vline 
WA_QPK1AC_STR-LTEXTMASSV sy-vline 
WA_QPK1AC_STR-AUSWIRKUNG sy-vline 
WA_QPK1AC_STR-LTEXTAUSWV sy-vline 
WA_QPK1AC_STR-BEWERTUNG sy-vline 
WA_QPK1AC_STR-FEHLKLASSE sy-vline 
WA_QPK1AC_STR-WAEHRUNG sy-vline 
WA_QPK1AC_STR-FKOSTEN sy-vline 
WA_QPK1AC_STR-MUSSTEXTKZ sy-vline 
WA_QPK1AC_STR-AENDERKZ sy-vline 
WA_QPK1AC_STR-ERSTELLER sy-vline 
WA_QPK1AC_STR-E_DATUM sy-vline 
WA_QPK1AC_STR-AENDERER sy-vline 
WA_QPK1AC_STR-A_DATUM sy-vline 
WA_QPK1AC_STR-GELOESCHT sy-vline 
WA_QPK1AC_STR-QKENNZAHL sy-vline 
WA_QPK1AC_STR-FOLGEAKTI sy-vline 
WA_QPK1AC_STR-BB_VORSCH sy-vline 
WA_QPK1AC_STR-BB_DUNKEL sy-vline 
WA_QPK1AC_STR-FELDNAME sy-vline 
WA_QPK1AC_STR-KURZTEXTCD sy-vline 
WA_QPK1AC_STR-LTEXTCD sy-vline 
WA_QPK1AC_STR-KURZTEXTGR sy-vline 
WA_QPK1AC_STR-LTEXTGR sy-vline 
WA_QPK1AC_STR-SPRACHE sy-vline      INTO ld_text SEPARATED BY SPACE.

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