ABAP Select data from SAP table DCFLS_ACC_ASSIGN_RT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DCFLS_ACC_ASSIGN_RT 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_ACC_ASSIGN_RT. 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_ACC_ASSIGN_RT 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_ACC_ASSIGN_RT TYPE STANDARD TABLE OF DCFLS_ACC_ASSIGN_RT,
      WA_DCFLS_ACC_ASSIGN_RT TYPE DCFLS_ACC_ASSIGN_RT,
      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_ACC_ASSIGN_RT> TYPE DCFLS_ACC_ASSIGN_RT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DCFLS_ACC_ASSIGN_RT
*  INTO TABLE @DATA(IT_DCFLS_ACC_ASSIGN_RT2).
*--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_ACC_ASSIGN_RT INDEX 1 INTO DATA(WA_DCFLS_ACC_ASSIGN_RT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DCFLS_ACC_ASSIGN_RT>-KNTTP = 1.
<DCFLS_ACC_ASSIGN_RT>-KOSTL = 1.
<DCFLS_ACC_ASSIGN_RT>-AUFNR = 1.
<DCFLS_ACC_ASSIGN_RT>-AUFPS = 1.
<DCFLS_ACC_ASSIGN_RT>-KDPOS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DCFLS_ACC_ASSIGN_RT-KDEIN, sy-vline,
  WA_DCFLS_ACC_ASSIGN_RT-NPLNR, sy-vline,
  WA_DCFLS_ACC_ASSIGN_RT-VORNR, sy-vline,
  WA_DCFLS_ACC_ASSIGN_RT-IMKEY, sy-vline,
  WA_DCFLS_ACC_ASSIGN_RT-ANLN1, sy-vline,
  WA_DCFLS_ACC_ASSIGN_RT-ANLN2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DCFLS_ACC_ASSIGN_RT 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_ACC_ASSIGN_RT 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_ACC_ASSIGN_RT INTO WA_DCFLS_ACC_ASSIGN_RT.


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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field EQUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DCFLS_ACC_ASSIGN_RT-EQUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DCFLS_ACC_ASSIGN_RT-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_ACC_ASSIGN_RT-PS_PSP_PNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DCFLS_ACC_ASSIGN_RT-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_ACC_ASSIGN_RT-PS_POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DCFLS_ACC_ASSIGN_RT-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_ACC_ASSIGN_RT-KDAUF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DCFLS_ACC_ASSIGN_RT-KDAUF.
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_ACC_ASSIGN_RT_STR, 
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,END OF T_EKKO_STR.
DATA: WA_DCFLS_ACC_ASSIGN_RT_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_ACC_ASSIGN_RT_STR-KNTTP sy-vline 
WA_DCFLS_ACC_ASSIGN_RT_STR-KOSTL sy-vline 
WA_DCFLS_ACC_ASSIGN_RT_STR-AUFNR sy-vline 
WA_DCFLS_ACC_ASSIGN_RT_STR-AUFPS sy-vline 
WA_DCFLS_ACC_ASSIGN_RT_STR-KDPOS sy-vline 
WA_DCFLS_ACC_ASSIGN_RT_STR-KDEIN sy-vline 
WA_DCFLS_ACC_ASSIGN_RT_STR-NPLNR sy-vline 
WA_DCFLS_ACC_ASSIGN_RT_STR-VORNR sy-vline 
WA_DCFLS_ACC_ASSIGN_RT_STR-IMKEY sy-vline 
WA_DCFLS_ACC_ASSIGN_RT_STR-ANLN1 sy-vline 
WA_DCFLS_ACC_ASSIGN_RT_STR-ANLN2 sy-vline 
WA_DCFLS_ACC_ASSIGN_RT_STR-EQUNR sy-vline 
WA_DCFLS_ACC_ASSIGN_RT_STR-PS_PSP_PNR sy-vline 
WA_DCFLS_ACC_ASSIGN_RT_STR-PS_POSID sy-vline 
WA_DCFLS_ACC_ASSIGN_RT_STR-KDAUF sy-vline 
WA_DCFLS_ACC_ASSIGN_RT_STR-KDAUF_LONG sy-vline 
WA_DCFLS_ACC_ASSIGN_RT_STR-PAOBJNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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