ABAP Select data from SAP table QDQLPOS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QDQLPOS
*  INTO TABLE @DATA(IT_QDQLPOS2).
*--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_QDQLPOS INDEX 1 INTO DATA(WA_QDQLPOS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QDQLPOS>-PRUEFLOS = 1.
<QDQLPOS>-DYNHEAD = 1.
<QDQLPOS>-STAT45 = 1.
<QDQLPOS>-STAT46 = 1.
<QDQLPOS>-STAT47 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QDQLPOS-STAT48, sy-vline,
  WA_QDQLPOS-STAT49, sy-vline,
  WA_QDQLPOS-STAT50, sy-vline,
  WA_QDQLPOS-DYNKRIT, sy-vline,
  WA_QDQLPOS-WERKS, sy-vline,
  WA_QDQLPOS-MATNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QDQLPOS 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_QDQLPOS 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_QDQLPOS INTO WA_QDQLPOS.


*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_QDQLPOS-PRUEFLOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QDQLPOS-PRUEFLOS.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QDQLPOS-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QDQLPOS-KUNNR.
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_QDQLPOS_STR, 
PRUEFLOS TYPE STRING,
DYNHEAD TYPE STRING,
STAT45 TYPE STRING,
STAT46 TYPE STRING,
STAT47 TYPE STRING,
STAT48 TYPE STRING,
STAT49 TYPE STRING,
STAT50 TYPE STRING,
DYNKRIT TYPE STRING,
WERKS TYPE STRING,
MATNR TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
PLNFL TYPE STRING,
PLNKN TYPE STRING,
ZAEHLERQL TYPE STRING,
LIFNR TYPE STRING,
HERSTELLER TYPE STRING,
KUNNR TYPE STRING,
PRUEFART TYPE STRING,
VORGLFNR TYPE STRING,
MERKNR TYPE STRING,
DYNREGEL TYPE STRING,
PRSTUFE TYPE STRING,
PRSCHAERFE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QDQLPOS_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_QDQLPOS_STR-PRUEFLOS sy-vline 
WA_QDQLPOS_STR-DYNHEAD sy-vline 
WA_QDQLPOS_STR-STAT45 sy-vline 
WA_QDQLPOS_STR-STAT46 sy-vline 
WA_QDQLPOS_STR-STAT47 sy-vline 
WA_QDQLPOS_STR-STAT48 sy-vline 
WA_QDQLPOS_STR-STAT49 sy-vline 
WA_QDQLPOS_STR-STAT50 sy-vline 
WA_QDQLPOS_STR-DYNKRIT sy-vline 
WA_QDQLPOS_STR-WERKS sy-vline 
WA_QDQLPOS_STR-MATNR sy-vline 
WA_QDQLPOS_STR-PLNTY sy-vline 
WA_QDQLPOS_STR-PLNNR sy-vline 
WA_QDQLPOS_STR-PLNAL sy-vline 
WA_QDQLPOS_STR-PLNFL sy-vline 
WA_QDQLPOS_STR-PLNKN sy-vline 
WA_QDQLPOS_STR-ZAEHLERQL sy-vline 
WA_QDQLPOS_STR-LIFNR sy-vline 
WA_QDQLPOS_STR-HERSTELLER sy-vline 
WA_QDQLPOS_STR-KUNNR sy-vline 
WA_QDQLPOS_STR-PRUEFART sy-vline 
WA_QDQLPOS_STR-VORGLFNR sy-vline 
WA_QDQLPOS_STR-MERKNR sy-vline 
WA_QDQLPOS_STR-DYNREGEL sy-vline 
WA_QDQLPOS_STR-PRSTUFE sy-vline 
WA_QDQLPOS_STR-PRSCHAERFE sy-vline      INTO ld_text SEPARATED BY SPACE.

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