ABAP Select data from SAP table TMSCDES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TMSCDES
*  INTO TABLE @DATA(IT_TMSCDES2).
*--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_TMSCDES INDEX 1 INTO DATA(WA_TMSCDES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TMSCDES>-RFCDES = 1.
<TMSCDES>-LIMBO = 1.
<TMSCDES>-RFCTYPE = 1.
<TMSCDES>-RFCLBFLAG = 1.
<TMSCDES>-RFCHOST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TMSCDES-RFCSERV, sy-vline,
  WA_TMSCDES-RFCCLIENT, sy-vline,
  WA_TMSCDES-RFCUSER, sy-vline,
  WA_TMSCDES-RFCLANG, sy-vline,
  WA_TMSCDES-RFCAUTH, sy-vline,
  WA_TMSCDES-RFCPWSCR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TMSCDES 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_TMSCDES 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_TMSCDES INTO WA_TMSCDES.


*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 ISOLA, internal->external for field RFCLANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_TMSCDES-RFCLANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TMSCDES-RFCLANG.
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_TMSCDES_STR, 
RFCDES TYPE STRING,
LIMBO TYPE STRING,
RFCTYPE TYPE STRING,
RFCLBFLAG TYPE STRING,
RFCHOST TYPE STRING,
RFCSERV TYPE STRING,
RFCCLIENT TYPE STRING,
RFCUSER TYPE STRING,
RFCLANG TYPE STRING,
RFCAUTH TYPE STRING,
RFCPWSCR TYPE STRING,
DOMNAM TYPE STRING,
DELETED TYPE STRING,
MODDAT TYPE STRING,
MODTIM TYPE STRING,
GWHOST TYPE STRING,
GWSERV TYPE STRING,
SNCALLOW TYPE STRING,
SNCNAME TYPE STRING,
SNCQOP TYPE STRING,
LANGUAGES TYPE STRING,
RFCUNICODE TYPE STRING,
TRUSTEDRFC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TMSCDES_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_TMSCDES_STR-RFCDES sy-vline 
WA_TMSCDES_STR-LIMBO sy-vline 
WA_TMSCDES_STR-RFCTYPE sy-vline 
WA_TMSCDES_STR-RFCLBFLAG sy-vline 
WA_TMSCDES_STR-RFCHOST sy-vline 
WA_TMSCDES_STR-RFCSERV sy-vline 
WA_TMSCDES_STR-RFCCLIENT sy-vline 
WA_TMSCDES_STR-RFCUSER sy-vline 
WA_TMSCDES_STR-RFCLANG sy-vline 
WA_TMSCDES_STR-RFCAUTH sy-vline 
WA_TMSCDES_STR-RFCPWSCR sy-vline 
WA_TMSCDES_STR-DOMNAM sy-vline 
WA_TMSCDES_STR-DELETED sy-vline 
WA_TMSCDES_STR-MODDAT sy-vline 
WA_TMSCDES_STR-MODTIM sy-vline 
WA_TMSCDES_STR-GWHOST sy-vline 
WA_TMSCDES_STR-GWSERV sy-vline 
WA_TMSCDES_STR-SNCALLOW sy-vline 
WA_TMSCDES_STR-SNCNAME sy-vline 
WA_TMSCDES_STR-SNCQOP sy-vline 
WA_TMSCDES_STR-LANGUAGES sy-vline 
WA_TMSCDES_STR-RFCUNICODE sy-vline 
WA_TMSCDES_STR-TRUSTEDRFC sy-vline      INTO ld_text SEPARATED BY SPACE.

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