ABAP Select data from SAP table DCFLS_PREPROC_IT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DCFLS_PREPROC_IT
*  INTO TABLE @DATA(IT_DCFLS_PREPROC_IT2).
*--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_DCFLS_PREPROC_IT INDEX 1 INTO DATA(WA_DCFLS_PREPROC_IT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DCFLS_PREPROC_IT>-RTKEY_HD = 1.
<DCFLS_PREPROC_IT>-RTKEY_IT = 1.
<DCFLS_PREPROC_IT>-ITEMID = 1.
<DCFLS_PREPROC_IT>-GLVOR = 1.
<DCFLS_PREPROC_IT>-VORGN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DCFLS_PREPROC_IT-BLART, sy-vline,
  WA_DCFLS_PREPROC_IT-GJAHR, sy-vline,
  WA_DCFLS_PREPROC_IT-MONAT, sy-vline,
  WA_DCFLS_PREPROC_IT-BUKRS, sy-vline,
  WA_DCFLS_PREPROC_IT-KOKRS, sy-vline,
  WA_DCFLS_PREPROC_IT-KUNNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DCFLS_PREPROC_IT 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_DCFLS_PREPROC_IT 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_DCFLS_PREPROC_IT INTO WA_DCFLS_PREPROC_IT.


*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 GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_DCFLS_PREPROC_IT-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DCFLS_PREPROC_IT-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit IMKEY, internal->external for field IMKEY
CALL FUNCTION 'CONVERSION_EXIT_IMKEY_OUTPUT'
  EXPORTING
    input =                      WA_DCFLS_PREPROC_IT-IMKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DCFLS_PREPROC_IT-IMKEY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DCFLS_PREPROC_IT-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DCFLS_PREPROC_IT-ANLN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DCFLS_PREPROC_IT-ANLN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DCFLS_PREPROC_IT-ANLN2.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ABPSP, internal->external for field PS_PSP_PNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_DCFLS_PREPROC_IT-PS_PSP_PNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DCFLS_PREPROC_IT-PS_PSP_PNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field PS_POSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_DCFLS_PREPROC_IT-PS_POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DCFLS_PREPROC_IT-PS_POSID.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DCFLS_PREPROC_IT-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DCFLS_PREPROC_IT-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ERFME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DCFLS_PREPROC_IT-ERFME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DCFLS_PREPROC_IT-ERFME.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DCFLS_PREPROC_IT-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DCFLS_PREPROC_IT-PRCTR.
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_DCFLS_PREPROC_IT_STR, 
RTKEY_HD TYPE STRING,
RTKEY_IT TYPE STRING,
ITEMID TYPE STRING,
GLVOR TYPE STRING,
VORGN TYPE STRING,
BLART TYPE STRING,
GJAHR TYPE STRING,
MONAT TYPE STRING,
BUKRS TYPE STRING,
KOKRS TYPE STRING,
KUNNR TYPE STRING,
LIFNR TYPE STRING,
KNTTP TYPE STRING,
KOSTL TYPE STRING,
AUFNR TYPE STRING,
AUFPS TYPE STRING,
KDPOS TYPE STRING,
KDEIN TYPE STRING,
NPLNR TYPE STRING,
VORNR TYPE STRING,
IMKEY TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
EQUNR TYPE STRING,
PS_PSP_PNR TYPE STRING,
PS_POSID TYPE STRING,
KDAUF TYPE STRING,
KDAUF_LONG TYPE STRING,
PAOBJNR TYPE STRING,
MATNR TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,
WERKS TYPE STRING,
BWTAR TYPE STRING,
KSYMB TYPE STRING,
MTART TYPE STRING,
PRCTR TYPE STRING,
GSBER TYPE STRING,
ACTION_CODE TYPE STRING,
BO_SPECIFIC_ITEM TYPE STRING,
CR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DCFLS_PREPROC_IT_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_DCFLS_PREPROC_IT_STR-RTKEY_HD sy-vline 
WA_DCFLS_PREPROC_IT_STR-RTKEY_IT sy-vline 
WA_DCFLS_PREPROC_IT_STR-ITEMID sy-vline 
WA_DCFLS_PREPROC_IT_STR-GLVOR sy-vline 
WA_DCFLS_PREPROC_IT_STR-VORGN sy-vline 
WA_DCFLS_PREPROC_IT_STR-BLART sy-vline 
WA_DCFLS_PREPROC_IT_STR-GJAHR sy-vline 
WA_DCFLS_PREPROC_IT_STR-MONAT sy-vline 
WA_DCFLS_PREPROC_IT_STR-BUKRS sy-vline 
WA_DCFLS_PREPROC_IT_STR-KOKRS sy-vline 
WA_DCFLS_PREPROC_IT_STR-KUNNR sy-vline 
WA_DCFLS_PREPROC_IT_STR-LIFNR sy-vline 
WA_DCFLS_PREPROC_IT_STR-KNTTP sy-vline 
WA_DCFLS_PREPROC_IT_STR-KOSTL sy-vline 
WA_DCFLS_PREPROC_IT_STR-AUFNR sy-vline 
WA_DCFLS_PREPROC_IT_STR-AUFPS sy-vline 
WA_DCFLS_PREPROC_IT_STR-KDPOS sy-vline 
WA_DCFLS_PREPROC_IT_STR-KDEIN sy-vline 
WA_DCFLS_PREPROC_IT_STR-NPLNR sy-vline 
WA_DCFLS_PREPROC_IT_STR-VORNR sy-vline 
WA_DCFLS_PREPROC_IT_STR-IMKEY sy-vline 
WA_DCFLS_PREPROC_IT_STR-ANLN1 sy-vline 
WA_DCFLS_PREPROC_IT_STR-ANLN2 sy-vline 
WA_DCFLS_PREPROC_IT_STR-EQUNR sy-vline 
WA_DCFLS_PREPROC_IT_STR-PS_PSP_PNR sy-vline 
WA_DCFLS_PREPROC_IT_STR-PS_POSID sy-vline 
WA_DCFLS_PREPROC_IT_STR-KDAUF sy-vline 
WA_DCFLS_PREPROC_IT_STR-KDAUF_LONG sy-vline 
WA_DCFLS_PREPROC_IT_STR-PAOBJNR sy-vline 
WA_DCFLS_PREPROC_IT_STR-MATNR sy-vline 
WA_DCFLS_PREPROC_IT_STR-MENGE sy-vline 
WA_DCFLS_PREPROC_IT_STR-MEINS sy-vline 
WA_DCFLS_PREPROC_IT_STR-ERFMG sy-vline 
WA_DCFLS_PREPROC_IT_STR-ERFME sy-vline 
WA_DCFLS_PREPROC_IT_STR-WERKS sy-vline 
WA_DCFLS_PREPROC_IT_STR-BWTAR sy-vline 
WA_DCFLS_PREPROC_IT_STR-KSYMB sy-vline 
WA_DCFLS_PREPROC_IT_STR-MTART sy-vline 
WA_DCFLS_PREPROC_IT_STR-PRCTR sy-vline 
WA_DCFLS_PREPROC_IT_STR-GSBER sy-vline 
WA_DCFLS_PREPROC_IT_STR-ACTION_CODE sy-vline 
WA_DCFLS_PREPROC_IT_STR-BO_SPECIFIC_ITEM sy-vline 
WA_DCFLS_PREPROC_IT_STR-CR sy-vline      INTO ld_text SEPARATED BY SPACE.

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