ABAP Select data from SAP table CGSDIM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CGSDIM
*  INTO TABLE @DATA(IT_CGSDIM2).
*--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_CGSDIM INDEX 1 INTO DATA(WA_CGSDIM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CGSDIM>-FIENM = 1.
<CGSDIM>-TXT_M = 1.
<CGSDIM>-TXT_S = 1.
<CGSDIM>-DTYPE = 1.
<CGSDIM>-ILENG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CGSDIM-TIMFL, sy-vline,
  WA_CGSDIM-CVMRK, sy-vline,
  WA_CGSDIM-CHTCU, sy-vline,
  WA_CGSDIM-CHTUN, sy-vline,
  WA_CGSDIM-ROLNM, sy-vline,
  WA_CGSDIM-DOMNM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CGSDIM 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_CGSDIM 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_CGSDIM INTO WA_CGSDIM.


*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 DTYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_CGSDIM-DTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CGSDIM-DTYPE.
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_CGSDIM_STR, 
FIENM TYPE STRING,
TXT_M TYPE STRING,
TXT_S TYPE STRING,
DTYPE TYPE STRING,
ILENG TYPE STRING,
TIMFL TYPE STRING,
CVMRK TYPE STRING,
CHTCU TYPE STRING,
CHTUN TYPE STRING,
ROLNM TYPE STRING,
DOMNM TYPE STRING,
CHTAB TYPE STRING,
PREFX TYPE STRING,
CHNUM TYPE STRING,
CHTEX TYPE STRING,
VALEX TYPE STRING,
NOVAL TYPE STRING,
FIXVL TYPE STRING,
TIMLC TYPE STRING,
ORTAB TYPE STRING,
ORFIE TYPE STRING,
MARK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CGSDIM_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_CGSDIM_STR-FIENM sy-vline 
WA_CGSDIM_STR-TXT_M sy-vline 
WA_CGSDIM_STR-TXT_S sy-vline 
WA_CGSDIM_STR-DTYPE sy-vline 
WA_CGSDIM_STR-ILENG sy-vline 
WA_CGSDIM_STR-TIMFL sy-vline 
WA_CGSDIM_STR-CVMRK sy-vline 
WA_CGSDIM_STR-CHTCU sy-vline 
WA_CGSDIM_STR-CHTUN sy-vline 
WA_CGSDIM_STR-ROLNM sy-vline 
WA_CGSDIM_STR-DOMNM sy-vline 
WA_CGSDIM_STR-CHTAB sy-vline 
WA_CGSDIM_STR-PREFX sy-vline 
WA_CGSDIM_STR-CHNUM sy-vline 
WA_CGSDIM_STR-CHTEX sy-vline 
WA_CGSDIM_STR-VALEX sy-vline 
WA_CGSDIM_STR-NOVAL sy-vline 
WA_CGSDIM_STR-FIXVL sy-vline 
WA_CGSDIM_STR-TIMLC sy-vline 
WA_CGSDIM_STR-ORTAB sy-vline 
WA_CGSDIM_STR-ORFIE sy-vline 
WA_CGSDIM_STR-MARK sy-vline      INTO ld_text SEPARATED BY SPACE.

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