ABAP Select data from SAP table D1120_FIELDS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP D1120_FIELDS 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 D1120_FIELDS. 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 D1120_FIELDS 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_D1120_FIELDS TYPE STANDARD TABLE OF D1120_FIELDS,
      WA_D1120_FIELDS TYPE D1120_FIELDS,
      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: <D1120_FIELDS> TYPE D1120_FIELDS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_D1120_FIELDS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM D1120_FIELDS
  INTO TABLE IT_D1120_FIELDS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM D1120_FIELDS
*  INTO TABLE @DATA(IT_D1120_FIELDS2).
*--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_D1120_FIELDS INDEX 1 INTO DATA(WA_D1120_FIELDS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_D1120_FIELDS ASSIGNING <D1120_FIELDS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<D1120_FIELDS>-TABNAME = 1.
<D1120_FIELDS>-TABTXT = 1.
<D1120_FIELDS>-FIELDNAME = 1.
<D1120_FIELDS>-FIELDTXT = 1.
<D1120_FIELDS>-VISIBLE_FLG = 1.

ENDLOOP.

LOOP AT IT_D1120_FIELDS INTO WA_D1120_FIELDS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_D1120_FIELDS-TABNAME__1, sy-vline,
  WA_D1120_FIELDS-TABTXT__1, sy-vline,
  WA_D1120_FIELDS-FIELDNAME__1, sy-vline,
  WA_D1120_FIELDS-FIELDTXT__1, sy-vline,
  WA_D1120_FIELDS-TABNAME__2, sy-vline,
  WA_D1120_FIELDS-TABTXT__2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_D1120_FIELDS 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_D1120_FIELDS 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_D1120_FIELDS INTO WA_D1120_FIELDS.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_D1120_FIELDS_STR, 
TABNAME TYPE STRING,
TABTXT TYPE STRING,
FIELDNAME TYPE STRING,
FIELDTXT TYPE STRING,
VISIBLE_FLG TYPE STRING,
TABNAME__1 TYPE STRING,
TABTXT__1 TYPE STRING,
FIELDNAME__1 TYPE STRING,
FIELDTXT__1 TYPE STRING,
TABNAME__2 TYPE STRING,
TABTXT__2 TYPE STRING,
FIELDNAME__2 TYPE STRING,
FIELDTXT__2 TYPE STRING,
TABNAME__3 TYPE STRING,
TABTXT__3 TYPE STRING,
FIELDNAME__3 TYPE STRING,
FIELDTXT__3 TYPE STRING,
TABNAME__4 TYPE STRING,
TABTXT__4 TYPE STRING,
FIELDNAME__4 TYPE STRING,
FIELDTXT__4 TYPE STRING,
TABNAME__5 TYPE STRING,
TABTXT__5 TYPE STRING,
FIELDNAME__5 TYPE STRING,
FIELDTXT__5 TYPE STRING,
TABNAME__6 TYPE STRING,
TABTXT__6 TYPE STRING,
FIELDNAME__6 TYPE STRING,
FIELDTXT__6 TYPE STRING,
TABNAME__7 TYPE STRING,
TABTXT__7 TYPE STRING,
FIELDNAME__7 TYPE STRING,
FIELDTXT__7 TYPE STRING,
TABNAME__8 TYPE STRING,
TABTXT__8 TYPE STRING,
FIELDNAME__8 TYPE STRING,
FIELDTXT__8 TYPE STRING,
TABNAME__9 TYPE STRING,
TABTXT__9 TYPE STRING,
FIELDNAME__9 TYPE STRING,
FIELDTXT__9 TYPE STRING,
TABNAME__10 TYPE STRING,
TABTXT__10 TYPE STRING,
FIELDNAME__10 TYPE STRING,
FIELDTXT__10 TYPE STRING,
TABNAME__11 TYPE STRING,
TABTXT__11 TYPE STRING,
FIELDNAME__11 TYPE STRING,
FIELDTXT__11 TYPE STRING,
TABNAME__12 TYPE STRING,
TABTXT__12 TYPE STRING,
FIELDNAME__12 TYPE STRING,
FIELDTXT__12 TYPE STRING,
TABNAME__13 TYPE STRING,
TABTXT__13 TYPE STRING,
FIELDNAME__13 TYPE STRING,
FIELDTXT__13 TYPE STRING,
TABNAME__14 TYPE STRING,
TABTXT__14 TYPE STRING,
FIELDNAME__14 TYPE STRING,
FIELDTXT__14 TYPE STRING,
TABNAME__15 TYPE STRING,
TABTXT__15 TYPE STRING,
FIELDNAME__15 TYPE STRING,
FIELDTXT__15 TYPE STRING,
TABNAME__16 TYPE STRING,
TABTXT__16 TYPE STRING,
FIELDNAME__16 TYPE STRING,
FIELDTXT__16 TYPE STRING,
TABNAME__17 TYPE STRING,
TABTXT__17 TYPE STRING,
FIELDNAME__17 TYPE STRING,
FIELDTXT__17 TYPE STRING,
TABNAME__18 TYPE STRING,
TABTXT__18 TYPE STRING,
FIELDNAME__18 TYPE STRING,
FIELDTXT__18 TYPE STRING,
TABNAME__19 TYPE STRING,
TABTXT__19 TYPE STRING,
FIELDNAME__19 TYPE STRING,
FIELDTXT__19 TYPE STRING,
TABNAME__20 TYPE STRING,
TABTXT__20 TYPE STRING,
FIELDNAME__20 TYPE STRING,
FIELDTXT__20 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_D1120_FIELDS_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_D1120_FIELDS_STR-TABNAME sy-vline 
WA_D1120_FIELDS_STR-TABTXT sy-vline 
WA_D1120_FIELDS_STR-FIELDNAME sy-vline 
WA_D1120_FIELDS_STR-FIELDTXT sy-vline 
WA_D1120_FIELDS_STR-VISIBLE_FLG sy-vline 
WA_D1120_FIELDS_STR-TABNAME__1 sy-vline 
WA_D1120_FIELDS_STR-TABTXT__1 sy-vline 
WA_D1120_FIELDS_STR-FIELDNAME__1 sy-vline 
WA_D1120_FIELDS_STR-FIELDTXT__1 sy-vline 
WA_D1120_FIELDS_STR-TABNAME__2 sy-vline 
WA_D1120_FIELDS_STR-TABTXT__2 sy-vline 
WA_D1120_FIELDS_STR-FIELDNAME__2 sy-vline 
WA_D1120_FIELDS_STR-FIELDTXT__2 sy-vline 
WA_D1120_FIELDS_STR-TABNAME__3 sy-vline 
WA_D1120_FIELDS_STR-TABTXT__3 sy-vline 
WA_D1120_FIELDS_STR-FIELDNAME__3 sy-vline 
WA_D1120_FIELDS_STR-FIELDTXT__3 sy-vline 
WA_D1120_FIELDS_STR-TABNAME__4 sy-vline 
WA_D1120_FIELDS_STR-TABTXT__4 sy-vline 
WA_D1120_FIELDS_STR-FIELDNAME__4 sy-vline 
WA_D1120_FIELDS_STR-FIELDTXT__4 sy-vline 
WA_D1120_FIELDS_STR-TABNAME__5 sy-vline 
WA_D1120_FIELDS_STR-TABTXT__5 sy-vline 
WA_D1120_FIELDS_STR-FIELDNAME__5 sy-vline 
WA_D1120_FIELDS_STR-FIELDTXT__5 sy-vline 
WA_D1120_FIELDS_STR-TABNAME__6 sy-vline 
WA_D1120_FIELDS_STR-TABTXT__6 sy-vline 
WA_D1120_FIELDS_STR-FIELDNAME__6 sy-vline 
WA_D1120_FIELDS_STR-FIELDTXT__6 sy-vline 
WA_D1120_FIELDS_STR-TABNAME__7 sy-vline 
WA_D1120_FIELDS_STR-TABTXT__7 sy-vline 
WA_D1120_FIELDS_STR-FIELDNAME__7 sy-vline 
WA_D1120_FIELDS_STR-FIELDTXT__7 sy-vline 
WA_D1120_FIELDS_STR-TABNAME__8 sy-vline 
WA_D1120_FIELDS_STR-TABTXT__8 sy-vline 
WA_D1120_FIELDS_STR-FIELDNAME__8 sy-vline 
WA_D1120_FIELDS_STR-FIELDTXT__8 sy-vline 
WA_D1120_FIELDS_STR-TABNAME__9 sy-vline 
WA_D1120_FIELDS_STR-TABTXT__9 sy-vline 
WA_D1120_FIELDS_STR-FIELDNAME__9 sy-vline 
WA_D1120_FIELDS_STR-FIELDTXT__9 sy-vline 
WA_D1120_FIELDS_STR-TABNAME__10 sy-vline 
WA_D1120_FIELDS_STR-TABTXT__10 sy-vline 
WA_D1120_FIELDS_STR-FIELDNAME__10 sy-vline 
WA_D1120_FIELDS_STR-FIELDTXT__10 sy-vline 
WA_D1120_FIELDS_STR-TABNAME__11 sy-vline 
WA_D1120_FIELDS_STR-TABTXT__11 sy-vline 
WA_D1120_FIELDS_STR-FIELDNAME__11 sy-vline 
WA_D1120_FIELDS_STR-FIELDTXT__11 sy-vline 
WA_D1120_FIELDS_STR-TABNAME__12 sy-vline 
WA_D1120_FIELDS_STR-TABTXT__12 sy-vline 
WA_D1120_FIELDS_STR-FIELDNAME__12 sy-vline 
WA_D1120_FIELDS_STR-FIELDTXT__12 sy-vline 
WA_D1120_FIELDS_STR-TABNAME__13 sy-vline 
WA_D1120_FIELDS_STR-TABTXT__13 sy-vline 
WA_D1120_FIELDS_STR-FIELDNAME__13 sy-vline 
WA_D1120_FIELDS_STR-FIELDTXT__13 sy-vline 
WA_D1120_FIELDS_STR-TABNAME__14 sy-vline 
WA_D1120_FIELDS_STR-TABTXT__14 sy-vline 
WA_D1120_FIELDS_STR-FIELDNAME__14 sy-vline 
WA_D1120_FIELDS_STR-FIELDTXT__14 sy-vline 
WA_D1120_FIELDS_STR-TABNAME__15 sy-vline 
WA_D1120_FIELDS_STR-TABTXT__15 sy-vline 
WA_D1120_FIELDS_STR-FIELDNAME__15 sy-vline 
WA_D1120_FIELDS_STR-FIELDTXT__15 sy-vline 
WA_D1120_FIELDS_STR-TABNAME__16 sy-vline 
WA_D1120_FIELDS_STR-TABTXT__16 sy-vline 
WA_D1120_FIELDS_STR-FIELDNAME__16 sy-vline 
WA_D1120_FIELDS_STR-FIELDTXT__16 sy-vline 
WA_D1120_FIELDS_STR-TABNAME__17 sy-vline 
WA_D1120_FIELDS_STR-TABTXT__17 sy-vline 
WA_D1120_FIELDS_STR-FIELDNAME__17 sy-vline 
WA_D1120_FIELDS_STR-FIELDTXT__17 sy-vline 
WA_D1120_FIELDS_STR-TABNAME__18 sy-vline 
WA_D1120_FIELDS_STR-TABTXT__18 sy-vline 
WA_D1120_FIELDS_STR-FIELDNAME__18 sy-vline 
WA_D1120_FIELDS_STR-FIELDTXT__18 sy-vline 
WA_D1120_FIELDS_STR-TABNAME__19 sy-vline 
WA_D1120_FIELDS_STR-TABTXT__19 sy-vline 
WA_D1120_FIELDS_STR-FIELDNAME__19 sy-vline 
WA_D1120_FIELDS_STR-FIELDTXT__19 sy-vline 
WA_D1120_FIELDS_STR-TABNAME__20 sy-vline 
WA_D1120_FIELDS_STR-TABTXT__20 sy-vline 
WA_D1120_FIELDS_STR-FIELDNAME__20 sy-vline 
WA_D1120_FIELDS_STR-FIELDTXT__20 sy-vline      INTO ld_text SEPARATED BY SPACE.

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