ABAP Select data from SAP table IQLTYLVL 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 IQLTYLVL 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 IQLTYLVL. 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 IQLTYLVL 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_IQLTYLVL TYPE STANDARD TABLE OF IQLTYLVL,
      WA_IQLTYLVL TYPE IQLTYLVL,
      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: <IQLTYLVL> TYPE IQLTYLVL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IQLTYLVL
*  INTO TABLE @DATA(IT_IQLTYLVL2).
*--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_IQLTYLVL INDEX 1 INTO DATA(WA_IQLTYLVL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IQLTYLVL>-MANDT = 1.
<IQLTYLVL>-PLANT = 1.
<IQLTYLVL>-MATERIAL = 1.
<IQLTYLVL>-BILLOFOPERATIONSTYPE = 1.
<IQLTYLVL>-BILLOFOPERATIONSGROUP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IQLTYLVL-BILLOFOPERATIONSVARIANT, sy-vline,
  WA_IQLTYLVL-BOOOPERATIONINTERNALID, sy-vline,
  WA_IQLTYLVL-SEQUENCE, sy-vline,
  WA_IQLTYLVL-QUALITYLEVELINTERNALID, sy-vline,
  WA_IQLTYLVL-SUPPLIER, sy-vline,
  WA_IQLTYLVL-MANUFACTURER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IQLTYLVL 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_IQLTYLVL 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_IQLTYLVL INTO WA_IQLTYLVL.


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

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

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

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

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

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

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

*Conversion exit NUMCV, internal->external for field INSPECTIONOPERATION
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_IQLTYLVL-INSPECTIONOPERATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IQLTYLVL-INSPECTIONOPERATION.
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_IQLTYLVL_STR, 
MANDT TYPE STRING,
PLANT TYPE STRING,
MATERIAL TYPE STRING,
BILLOFOPERATIONSTYPE TYPE STRING,
BILLOFOPERATIONSGROUP TYPE STRING,
BILLOFOPERATIONSVARIANT TYPE STRING,
BOOOPERATIONINTERNALID TYPE STRING,
SEQUENCE TYPE STRING,
QUALITYLEVELINTERNALID TYPE STRING,
SUPPLIER TYPE STRING,
MANUFACTURER TYPE STRING,
CUSTOMER TYPE STRING,
INSPECTIONLOTTYPE TYPE STRING,
INSPECTIONOPERATION TYPE STRING,
INSPECTIONCHARACTERISTIC TYPE STRING,
QLTYLVLINDIRECTLYCHANGEDBY TYPE STRING,
QLTYLVLMANUALLYCHANGEDBY TYPE STRING,
QLTYLVLINDIRECTLYCHANGEDON TYPE STRING,
QLTYLVLMANUALLYCHANGEDON TYPE STRING,
INSPECTIONLOT TYPE STRING,
INSPLOTUSAGEDECISIONVALUATION TYPE STRING,
INSPLOTUSGEDCSNDYNVALUATION TYPE STRING,
SAMPLINGPROCEDURE TYPE STRING,
INSPLOTDYNAMICRULE TYPE STRING,
QLTYLEVELNEXTDYNRULESTAGE TYPE STRING,
INSPLOTSWITHOUTUSAGEDECISION TYPE STRING,
INSPLOTSSINCESTAGECHG TYPE STRING,
RJCTDINSPLOTSSINCESTGECHG TYPE STRING,
INSPRESULTDYNMODIFVALUATION TYPE STRING,
INSPECTIONVALUATIONRESULT TYPE STRING,
QUALITYLEVELLASTOPENINSPLOT TYPE STRING,
QUALITYLEVELLASTINSPECTIONON TYPE STRING,
QLTYLEVELCANCELEDINSPECTIONS TYPE STRING,
QUALITYLEVELDELETIONON TYPE STRING,
QUALITYLEVELRESETON TYPE STRING,
CHANGEDDATETIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IQLTYLVL_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_IQLTYLVL_STR-MANDT sy-vline 
WA_IQLTYLVL_STR-PLANT sy-vline 
WA_IQLTYLVL_STR-MATERIAL sy-vline 
WA_IQLTYLVL_STR-BILLOFOPERATIONSTYPE sy-vline 
WA_IQLTYLVL_STR-BILLOFOPERATIONSGROUP sy-vline 
WA_IQLTYLVL_STR-BILLOFOPERATIONSVARIANT sy-vline 
WA_IQLTYLVL_STR-BOOOPERATIONINTERNALID sy-vline 
WA_IQLTYLVL_STR-SEQUENCE sy-vline 
WA_IQLTYLVL_STR-QUALITYLEVELINTERNALID sy-vline 
WA_IQLTYLVL_STR-SUPPLIER sy-vline 
WA_IQLTYLVL_STR-MANUFACTURER sy-vline 
WA_IQLTYLVL_STR-CUSTOMER sy-vline 
WA_IQLTYLVL_STR-INSPECTIONLOTTYPE sy-vline 
WA_IQLTYLVL_STR-INSPECTIONOPERATION sy-vline 
WA_IQLTYLVL_STR-INSPECTIONCHARACTERISTIC sy-vline 
WA_IQLTYLVL_STR-QLTYLVLINDIRECTLYCHANGEDBY sy-vline 
WA_IQLTYLVL_STR-QLTYLVLMANUALLYCHANGEDBY sy-vline 
WA_IQLTYLVL_STR-QLTYLVLINDIRECTLYCHANGEDON sy-vline 
WA_IQLTYLVL_STR-QLTYLVLMANUALLYCHANGEDON sy-vline 
WA_IQLTYLVL_STR-INSPECTIONLOT sy-vline 
WA_IQLTYLVL_STR-INSPLOTUSAGEDECISIONVALUATION sy-vline 
WA_IQLTYLVL_STR-INSPLOTUSGEDCSNDYNVALUATION sy-vline 
WA_IQLTYLVL_STR-SAMPLINGPROCEDURE sy-vline 
WA_IQLTYLVL_STR-INSPLOTDYNAMICRULE sy-vline 
WA_IQLTYLVL_STR-QLTYLEVELNEXTDYNRULESTAGE sy-vline 
WA_IQLTYLVL_STR-INSPLOTSWITHOUTUSAGEDECISION sy-vline 
WA_IQLTYLVL_STR-INSPLOTSSINCESTAGECHG sy-vline 
WA_IQLTYLVL_STR-RJCTDINSPLOTSSINCESTGECHG sy-vline 
WA_IQLTYLVL_STR-INSPRESULTDYNMODIFVALUATION sy-vline 
WA_IQLTYLVL_STR-INSPECTIONVALUATIONRESULT sy-vline 
WA_IQLTYLVL_STR-QUALITYLEVELLASTOPENINSPLOT sy-vline 
WA_IQLTYLVL_STR-QUALITYLEVELLASTINSPECTIONON sy-vline 
WA_IQLTYLVL_STR-QLTYLEVELCANCELEDINSPECTIONS sy-vline 
WA_IQLTYLVL_STR-QUALITYLEVELDELETIONON sy-vline 
WA_IQLTYLVL_STR-QUALITYLEVELRESETON sy-vline 
WA_IQLTYLVL_STR-CHANGEDDATETIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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