ABAP Select data from SAP table CMM_VAR_SPOT_RATE_S into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMM_VAR_SPOT_RATE_S
*  INTO TABLE @DATA(IT_CMM_VAR_SPOT_RATE_S2).
*--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_CMM_VAR_SPOT_RATE_S INDEX 1 INTO DATA(WA_CMM_VAR_SPOT_RATE_S2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMM_VAR_SPOT_RATE_S>-KURST = 1.
<CMM_VAR_SPOT_RATE_S>-FCURR = 1.
<CMM_VAR_SPOT_RATE_S>-TCURR = 1.
<CMM_VAR_SPOT_RATE_S>-GDATU = 1.
<CMM_VAR_SPOT_RATE_S>-UKURS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMM_VAR_SPOT_RATE_S-FFACT, sy-vline,
  WA_CMM_VAR_SPOT_RATE_S-TFACT, sy-vline,
  WA_CMM_VAR_SPOT_RATE_S-EVALUATIONDATE, sy-vline,
  WA_CMM_VAR_SPOT_RATE_S-COMPANYCODE, sy-vline,
  WA_CMM_VAR_SPOT_RATE_S-PHYSICALCOMMODITY, sy-vline,
  WA_CMM_VAR_SPOT_RATE_S-DERIVATIVECONTRSPECIFICATION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMM_VAR_SPOT_RATE_S 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_CMM_VAR_SPOT_RATE_S 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_CMM_VAR_SPOT_RATE_S INTO WA_CMM_VAR_SPOT_RATE_S.


*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 INVDT, internal->external for field GDATU
CALL FUNCTION 'CONVERSION_EXIT_INVDT_OUTPUT'
  EXPORTING
    input =                      WA_CMM_VAR_SPOT_RATE_S-GDATU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMM_VAR_SPOT_RATE_S-GDATU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field UKURS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_CMM_VAR_SPOT_RATE_S-UKURS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMM_VAR_SPOT_RATE_S-UKURS.
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_CMM_VAR_SPOT_RATE_S_STR, 
KURST TYPE STRING,
FCURR TYPE STRING,
TCURR TYPE STRING,
GDATU TYPE STRING,
UKURS TYPE STRING,
FFACT TYPE STRING,
TFACT TYPE STRING,
EVALUATIONDATE TYPE STRING,
COMPANYCODE TYPE STRING,
PHYSICALCOMMODITY TYPE STRING,
DERIVATIVECONTRSPECIFICATION TYPE STRING,
MARKETIDENTIFIERCODE TYPE STRING,
HIST_MARKET_START_DATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMM_VAR_SPOT_RATE_S_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_CMM_VAR_SPOT_RATE_S_STR-KURST sy-vline 
WA_CMM_VAR_SPOT_RATE_S_STR-FCURR sy-vline 
WA_CMM_VAR_SPOT_RATE_S_STR-TCURR sy-vline 
WA_CMM_VAR_SPOT_RATE_S_STR-GDATU sy-vline 
WA_CMM_VAR_SPOT_RATE_S_STR-UKURS sy-vline 
WA_CMM_VAR_SPOT_RATE_S_STR-FFACT sy-vline 
WA_CMM_VAR_SPOT_RATE_S_STR-TFACT sy-vline 
WA_CMM_VAR_SPOT_RATE_S_STR-EVALUATIONDATE sy-vline 
WA_CMM_VAR_SPOT_RATE_S_STR-COMPANYCODE sy-vline 
WA_CMM_VAR_SPOT_RATE_S_STR-PHYSICALCOMMODITY sy-vline 
WA_CMM_VAR_SPOT_RATE_S_STR-DERIVATIVECONTRSPECIFICATION sy-vline 
WA_CMM_VAR_SPOT_RATE_S_STR-MARKETIDENTIFIERCODE sy-vline 
WA_CMM_VAR_SPOT_RATE_S_STR-HIST_MARKET_START_DATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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