ABAP Select data from SAP table UGMD_S_DSFIELD_XL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM UGMD_S_DSFIELD_XL
*  INTO TABLE @DATA(IT_UGMD_S_DSFIELD_XL2).
*--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_UGMD_S_DSFIELD_XL INDEX 1 INTO DATA(WA_UGMD_S_DSFIELD_XL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<UGMD_S_DSFIELD_XL>-DSOURCE = 1.
<UGMD_S_DSFIELD_XL>-FIELD = 1.
<UGMD_S_DSFIELD_XL>-SELECTION = 1.
<UGMD_S_DSFIELD_XL>-UNIFIELDNM = 1.
<UGMD_S_DSFIELD_XL>-KEYFLAG_DS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_UGMD_S_DSFIELD_XL-SELOPTS, sy-vline,
  WA_UGMD_S_DSFIELD_XL-TABNAME, sy-vline,
  WA_UGMD_S_DSFIELD_XL-FIELDNAME, sy-vline,
  WA_UGMD_S_DSFIELD_XL-POSIT, sy-vline,
  WA_UGMD_S_DSFIELD_XL-KEYFLAG, sy-vline,
  WA_UGMD_S_DSFIELD_XL-ROLLNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_UGMD_S_DSFIELD_XL 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_UGMD_S_DSFIELD_XL 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_UGMD_S_DSFIELD_XL INTO WA_UGMD_S_DSFIELD_XL.


*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 DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_UGMD_S_DSFIELD_XL-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_UGMD_S_DSFIELD_XL-DATATYPE.
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_UGMD_S_DSFIELD_XL_STR, 
DSOURCE TYPE STRING,
FIELD TYPE STRING,
SELECTION TYPE STRING,
UNIFIELDNM TYPE STRING,
KEYFLAG_DS TYPE STRING,
SELOPTS TYPE STRING,
TABNAME TYPE STRING,
FIELDNAME TYPE STRING,
POSIT TYPE STRING,
KEYFLAG TYPE STRING,
ROLLNAME TYPE STRING,
INTTYPE TYPE STRING,
INTLEN TYPE STRING,
REFTABLE TYPE STRING,
REFFIELD TYPE STRING,
NOTNULL TYPE STRING,
DATATYPE TYPE STRING,
LENG TYPE STRING,
DECIMALS TYPE STRING,
DOMNAME TYPE STRING,
SHLPORIGIN TYPE STRING,
COMPTYPE TYPE STRING,
DDTEXT TYPE STRING,
CONVEXIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_UGMD_S_DSFIELD_XL_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_UGMD_S_DSFIELD_XL_STR-DSOURCE sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-FIELD sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-SELECTION sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-UNIFIELDNM sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-KEYFLAG_DS sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-SELOPTS sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-TABNAME sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-FIELDNAME sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-POSIT sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-KEYFLAG sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-ROLLNAME sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-INTTYPE sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-INTLEN sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-REFTABLE sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-REFFIELD sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-NOTNULL sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-DATATYPE sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-LENG sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-DECIMALS sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-DOMNAME sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-SHLPORIGIN sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-COMPTYPE sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-DDTEXT sy-vline 
WA_UGMD_S_DSFIELD_XL_STR-CONVEXIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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