ABAP Select data from SAP table RELUCSNCMEFLDS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RELUCSNCMEFLDS
*  INTO TABLE @DATA(IT_RELUCSNCMEFLDS2).
*--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_RELUCSNCMEFLDS INDEX 1 INTO DATA(WA_RELUCSNCMEFLDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RELUCSNCMEFLDS>-MANDT = 1.
<RELUCSNCMEFLDS>-INTRENO = 1.
<RELUCSNCMEFLDS>-TYPE = 1.
<RELUCSNCMEFLDS>-DSUSOF = 1.
<RELUCSNCMEFLDS>-DASUSOF = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RELUCSNCMEFLDS-DSPEON, sy-vline,
  WA_RELUCSNCMEFLDS-DASPEON, sy-vline,
  WA_RELUCSNCMEFLDS-DCO, sy-vline,
  WA_RELUCSNCMEFLDS-DACO, sy-vline,
  WA_RELUCSNCMEFLDS-DCS, sy-vline,
  WA_RELUCSNCMEFLDS-DACS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RELUCSNCMEFLDS 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_RELUCSNCMEFLDS 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_RELUCSNCMEFLDS INTO WA_RELUCSNCMEFLDS.


*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_RELUCSNCMEFLDS_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
TYPE TYPE STRING,
DSUSOF TYPE STRING,
DASUSOF TYPE STRING,
DSPEON TYPE STRING,
DASPEON TYPE STRING,
DCO TYPE STRING,
DACO TYPE STRING,
DCS TYPE STRING,
DACS TYPE STRING,
DCC TYPE STRING,
DACC TYPE STRING,
XMTYPE TYPE STRING,
CDSUSOF TYPE STRING,
CDASUSOF TYPE STRING,
CDSPEON TYPE STRING,
CDASPEON TYPE STRING,
CDCO TYPE STRING,
CDACO TYPE STRING,
CDCS TYPE STRING,
CDACS TYPE STRING,
CDCC TYPE STRING,
CDACC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RELUCSNCMEFLDS_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_RELUCSNCMEFLDS_STR-MANDT sy-vline 
WA_RELUCSNCMEFLDS_STR-INTRENO sy-vline 
WA_RELUCSNCMEFLDS_STR-TYPE sy-vline 
WA_RELUCSNCMEFLDS_STR-DSUSOF sy-vline 
WA_RELUCSNCMEFLDS_STR-DASUSOF sy-vline 
WA_RELUCSNCMEFLDS_STR-DSPEON sy-vline 
WA_RELUCSNCMEFLDS_STR-DASPEON sy-vline 
WA_RELUCSNCMEFLDS_STR-DCO sy-vline 
WA_RELUCSNCMEFLDS_STR-DACO sy-vline 
WA_RELUCSNCMEFLDS_STR-DCS sy-vline 
WA_RELUCSNCMEFLDS_STR-DACS sy-vline 
WA_RELUCSNCMEFLDS_STR-DCC sy-vline 
WA_RELUCSNCMEFLDS_STR-DACC sy-vline 
WA_RELUCSNCMEFLDS_STR-XMTYPE sy-vline 
WA_RELUCSNCMEFLDS_STR-CDSUSOF sy-vline 
WA_RELUCSNCMEFLDS_STR-CDASUSOF sy-vline 
WA_RELUCSNCMEFLDS_STR-CDSPEON sy-vline 
WA_RELUCSNCMEFLDS_STR-CDASPEON sy-vline 
WA_RELUCSNCMEFLDS_STR-CDCO sy-vline 
WA_RELUCSNCMEFLDS_STR-CDACO sy-vline 
WA_RELUCSNCMEFLDS_STR-CDCS sy-vline 
WA_RELUCSNCMEFLDS_STR-CDACS sy-vline 
WA_RELUCSNCMEFLDS_STR-CDCC sy-vline 
WA_RELUCSNCMEFLDS_STR-CDACC sy-vline      INTO ld_text SEPARATED BY SPACE.

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