ABAP Select data from SAP table UPF_YS_FLDDS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM UPF_YS_FLDDS
*  INTO TABLE @DATA(IT_UPF_YS_FLDDS2).
*--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_UPF_YS_FLDDS INDEX 1 INTO DATA(WA_UPF_YS_FLDDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<UPF_YS_FLDDS>-FIELDNAME = 1.
<UPF_YS_FLDDS>-TABNAME = 1.
<UPF_YS_FLDDS>-OBJTP = 1.
<UPF_YS_FLDDS>-ATRFI = 1.
<UPF_YS_FLDDS>-SCRTEXT_M = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_UPF_YS_FLDDS-PFTYP, sy-vline,
  WA_UPF_YS_FLDDS-SORTNR, sy-vline,
  WA_UPF_YS_FLDDS-W_MORE, sy-vline,
  WA_UPF_YS_FLDDS-SNGVL, sy-vline,
  WA_UPF_YS_FLDDS-TECHF, sy-vline,
  WA_UPF_YS_FLDDS-MCHCK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_UPF_YS_FLDDS 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_UPF_YS_FLDDS 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_UPF_YS_FLDDS INTO WA_UPF_YS_FLDDS.


*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 CUNIT, internal->external for field FIXUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_UPF_YS_FLDDS-FIXUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_UPF_YS_FLDDS-FIXUNIT.
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_UPF_YS_FLDDS_STR, 
FIELDNAME TYPE STRING,
TABNAME TYPE STRING,
OBJTP TYPE STRING,
ATRFI TYPE STRING,
SCRTEXT_M TYPE STRING,
PFTYP TYPE STRING,
SORTNR TYPE STRING,
W_MORE TYPE STRING,
SNGVL TYPE STRING,
TECHF TYPE STRING,
MCHCK TYPE STRING,
CHCKB TYPE STRING,
TXTDIS TYPE STRING,
OBLIG TYPE STRING,
NOINI TYPE STRING,
VARIA TYPE STRING,
MLTYV TYPE STRING,
VOFFS TYPE STRING,
HIERA TYPE STRING,
HIENM TYPE STRING,
HIEVER TYPE STRING,
DATETO TYPE STRING,
ATTRI TYPE STRING,
ROLLNAME TYPE STRING,
INTLEN TYPE STRING,
OUTPUTLEN TYPE STRING,
DECIMALS TYPE STRING,
INTTYPE TYPE STRING,
CONVEXIT TYPE STRING,
SIGN TYPE STRING,
FIXUNIT TYPE STRING,
FIXCUKY TYPE STRING,
UNINM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_UPF_YS_FLDDS_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_UPF_YS_FLDDS_STR-FIELDNAME sy-vline 
WA_UPF_YS_FLDDS_STR-TABNAME sy-vline 
WA_UPF_YS_FLDDS_STR-OBJTP sy-vline 
WA_UPF_YS_FLDDS_STR-ATRFI sy-vline 
WA_UPF_YS_FLDDS_STR-SCRTEXT_M sy-vline 
WA_UPF_YS_FLDDS_STR-PFTYP sy-vline 
WA_UPF_YS_FLDDS_STR-SORTNR sy-vline 
WA_UPF_YS_FLDDS_STR-W_MORE sy-vline 
WA_UPF_YS_FLDDS_STR-SNGVL sy-vline 
WA_UPF_YS_FLDDS_STR-TECHF sy-vline 
WA_UPF_YS_FLDDS_STR-MCHCK sy-vline 
WA_UPF_YS_FLDDS_STR-CHCKB sy-vline 
WA_UPF_YS_FLDDS_STR-TXTDIS sy-vline 
WA_UPF_YS_FLDDS_STR-OBLIG sy-vline 
WA_UPF_YS_FLDDS_STR-NOINI sy-vline 
WA_UPF_YS_FLDDS_STR-VARIA sy-vline 
WA_UPF_YS_FLDDS_STR-MLTYV sy-vline 
WA_UPF_YS_FLDDS_STR-VOFFS sy-vline 
WA_UPF_YS_FLDDS_STR-HIERA sy-vline 
WA_UPF_YS_FLDDS_STR-HIENM sy-vline 
WA_UPF_YS_FLDDS_STR-HIEVER sy-vline 
WA_UPF_YS_FLDDS_STR-DATETO sy-vline 
WA_UPF_YS_FLDDS_STR-ATTRI sy-vline 
WA_UPF_YS_FLDDS_STR-ROLLNAME sy-vline 
WA_UPF_YS_FLDDS_STR-INTLEN sy-vline 
WA_UPF_YS_FLDDS_STR-OUTPUTLEN sy-vline 
WA_UPF_YS_FLDDS_STR-DECIMALS sy-vline 
WA_UPF_YS_FLDDS_STR-INTTYPE sy-vline 
WA_UPF_YS_FLDDS_STR-CONVEXIT sy-vline 
WA_UPF_YS_FLDDS_STR-SIGN sy-vline 
WA_UPF_YS_FLDDS_STR-FIXUNIT sy-vline 
WA_UPF_YS_FLDDS_STR-FIXCUKY sy-vline 
WA_UPF_YS_FLDDS_STR-UNINM sy-vline      INTO ld_text SEPARATED BY SPACE.

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