ABAP Select data from SAP table QPAC into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP QPAC 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 QPAC. 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 QPAC 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_QPAC TYPE STANDARD TABLE OF QPAC,
      WA_QPAC TYPE QPAC,
      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: <QPAC> TYPE QPAC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QPAC
*  INTO TABLE @DATA(IT_QPAC2).
*--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_QPAC INDEX 1 INTO DATA(WA_QPAC2).


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

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

ENDLOOP.

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

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


*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_QPAC-VERSIONAM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QPAC-VERSIONAM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VERSIONCD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QPAC-VERSIONCD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QPAC-VERSIONCD.
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_QPAC_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,END OF T_EKKO_STR.
DATA: WA_QPAC_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_QPAC_STR-MANDT sy-vline 
WA_QPAC_STR-WERKS sy-vline 
WA_QPAC_STR-KATALOGART sy-vline 
WA_QPAC_STR-AUSWAHLMGE sy-vline 
WA_QPAC_STR-CODEGRUPPE sy-vline 
WA_QPAC_STR-CODE sy-vline 
WA_QPAC_STR-VERSIONAM sy-vline 
WA_QPAC_STR-GUELTIGAB sy-vline 
WA_QPAC_STR-VERSIONCD sy-vline 
WA_QPAC_STR-MASSNAHME sy-vline 
WA_QPAC_STR-LTEXTMASSV sy-vline 
WA_QPAC_STR-AUSWIRKUNG sy-vline 
WA_QPAC_STR-LTEXTAUSWV sy-vline 
WA_QPAC_STR-BEWERTUNG sy-vline 
WA_QPAC_STR-FEHLKLASSE sy-vline 
WA_QPAC_STR-WAEHRUNG sy-vline 
WA_QPAC_STR-FKOSTEN sy-vline 
WA_QPAC_STR-MUSSTEXTKZ sy-vline 
WA_QPAC_STR-AENDERKZ sy-vline 
WA_QPAC_STR-ERSTELLER sy-vline 
WA_QPAC_STR-E_DATUM sy-vline 
WA_QPAC_STR-AENDERER sy-vline 
WA_QPAC_STR-A_DATUM sy-vline 
WA_QPAC_STR-GELOESCHT sy-vline 
WA_QPAC_STR-QKENNZAHL sy-vline 
WA_QPAC_STR-FOLGEAKTI sy-vline 
WA_QPAC_STR-BB_VORSCH sy-vline 
WA_QPAC_STR-BB_DUNKEL sy-vline 
WA_QPAC_STR-FELDNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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