ABAP Select data from SAP table QPCPD_ITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QPCPD_ITEM
*  INTO TABLE @DATA(IT_QPCPD_ITEM2).
*--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_QPCPD_ITEM INDEX 1 INTO DATA(WA_QPCPD_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QPCPD_ITEM>-CLIENT = 1.
<QPCPD_ITEM>-ITEM_GUID = 1.
<QPCPD_ITEM>-ITEM_ID = 1.
<QPCPD_ITEM>-PLAN_GUID = 1.
<QPCPD_ITEM>-MATNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QPCPD_ITEM-WERKS, sy-vline,
  WA_QPCPD_ITEM-PART_NUMBER, sy-vline,
  WA_QPCPD_ITEM-OBJTYPE, sy-vline,
  WA_QPCPD_ITEM-PROCTYPE, sy-vline,
  WA_QPCPD_ITEM-PLNTY, sy-vline,
  WA_QPCPD_ITEM-PLNNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QPCPD_ITEM 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_QPCPD_ITEM 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_QPCPD_ITEM INTO WA_QPCPD_ITEM.


*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 MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_QPCPD_ITEM-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QPCPD_ITEM-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QPCPD_ITEM-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QPCPD_ITEM-DOKNR.
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_QPCPD_ITEM_STR, 
CLIENT TYPE STRING,
ITEM_GUID TYPE STRING,
ITEM_ID TYPE STRING,
PLAN_GUID TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
PART_NUMBER TYPE STRING,
OBJTYPE TYPE STRING,
PROCTYPE TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
DOKNR TYPE STRING,
DOKAR TYPE STRING,
DOKTL TYPE STRING,
DOKVR TYPE STRING,
CREATED_BY TYPE STRING,
CREATED_ON TYPE STRING,
CHANGED_BY TYPE STRING,
CHANGED_ON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QPCPD_ITEM_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_QPCPD_ITEM_STR-CLIENT sy-vline 
WA_QPCPD_ITEM_STR-ITEM_GUID sy-vline 
WA_QPCPD_ITEM_STR-ITEM_ID sy-vline 
WA_QPCPD_ITEM_STR-PLAN_GUID sy-vline 
WA_QPCPD_ITEM_STR-MATNR sy-vline 
WA_QPCPD_ITEM_STR-WERKS sy-vline 
WA_QPCPD_ITEM_STR-PART_NUMBER sy-vline 
WA_QPCPD_ITEM_STR-OBJTYPE sy-vline 
WA_QPCPD_ITEM_STR-PROCTYPE sy-vline 
WA_QPCPD_ITEM_STR-PLNTY sy-vline 
WA_QPCPD_ITEM_STR-PLNNR sy-vline 
WA_QPCPD_ITEM_STR-PLNAL sy-vline 
WA_QPCPD_ITEM_STR-DOKNR sy-vline 
WA_QPCPD_ITEM_STR-DOKAR sy-vline 
WA_QPCPD_ITEM_STR-DOKTL sy-vline 
WA_QPCPD_ITEM_STR-DOKVR sy-vline 
WA_QPCPD_ITEM_STR-CREATED_BY sy-vline 
WA_QPCPD_ITEM_STR-CREATED_ON sy-vline 
WA_QPCPD_ITEM_STR-CHANGED_BY sy-vline 
WA_QPCPD_ITEM_STR-CHANGED_ON sy-vline      INTO ld_text SEPARATED BY SPACE.

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