ABAP Select data from SAP table QIWL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QIWL
*  INTO TABLE @DATA(IT_QIWL2).
*--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_QIWL INDEX 1 INTO DATA(WA_QIWL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QIWL>-MANDANT = 1.
<QIWL>-SUBSYS = 1.
<QIWL>-PRUEFLOS = 1.
<QIWL>-PLNFL = 1.
<QIWL>-VORNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QIWL-PRPLATZ, sy-vline,
  WA_QIWL-PRPLATZWRK, sy-vline,
  WA_QIWL-EINFUEGDAT, sy-vline,
  WA_QIWL-EINFUEGTIM, sy-vline,
  WA_QIWL-AENDERDAT, sy-vline,
  WA_QIWL-AENDERTIM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QIWL 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_QIWL 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_QIWL INTO WA_QIWL.


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

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

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_QIWL-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QIWL-VORNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_QIWL-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QIWL-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field MBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QIWL-MBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QIWL-MBLNR.
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_QIWL_STR, 
MANDANT TYPE STRING,
SUBSYS TYPE STRING,
PRUEFLOS TYPE STRING,
PLNFL TYPE STRING,
VORNR TYPE STRING,
PRPLATZ TYPE STRING,
PRPLATZWRK TYPE STRING,
EINFUEGDAT TYPE STRING,
EINFUEGTIM TYPE STRING,
AENDERDAT TYPE STRING,
AENDERTIM TYPE STRING,
SENDATERST TYPE STRING,
SENTIMERST TYPE STRING,
SENDATKOR TYPE STRING,
SENTIMKOR TYPE STRING,
SENDSTAT TYPE STRING,
PRUEFSTAT TYPE STRING,
ART TYPE STRING,
ENSTEHDAT TYPE STRING,
HERKUNFT TYPE STRING,
VORGWERK TYPE STRING,
MATNR TYPE STRING,
CHARG TYPE STRING,
AUFNR TYPE STRING,
LIFNR TYPE STRING,
KUNNR TYPE STRING,
MBLNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QIWL_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_QIWL_STR-MANDANT sy-vline 
WA_QIWL_STR-SUBSYS sy-vline 
WA_QIWL_STR-PRUEFLOS sy-vline 
WA_QIWL_STR-PLNFL sy-vline 
WA_QIWL_STR-VORNR sy-vline 
WA_QIWL_STR-PRPLATZ sy-vline 
WA_QIWL_STR-PRPLATZWRK sy-vline 
WA_QIWL_STR-EINFUEGDAT sy-vline 
WA_QIWL_STR-EINFUEGTIM sy-vline 
WA_QIWL_STR-AENDERDAT sy-vline 
WA_QIWL_STR-AENDERTIM sy-vline 
WA_QIWL_STR-SENDATERST sy-vline 
WA_QIWL_STR-SENTIMERST sy-vline 
WA_QIWL_STR-SENDATKOR sy-vline 
WA_QIWL_STR-SENTIMKOR sy-vline 
WA_QIWL_STR-SENDSTAT sy-vline 
WA_QIWL_STR-PRUEFSTAT sy-vline 
WA_QIWL_STR-ART sy-vline 
WA_QIWL_STR-ENSTEHDAT sy-vline 
WA_QIWL_STR-HERKUNFT sy-vline 
WA_QIWL_STR-VORGWERK sy-vline 
WA_QIWL_STR-MATNR sy-vline 
WA_QIWL_STR-CHARG sy-vline 
WA_QIWL_STR-AUFNR sy-vline 
WA_QIWL_STR-LIFNR sy-vline 
WA_QIWL_STR-KUNNR sy-vline 
WA_QIWL_STR-MBLNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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