ABAP Select data from SAP table CPED_EXCHRATE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CPED_EXCHRATE
*  INTO TABLE @DATA(IT_CPED_EXCHRATE2).
*--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_CPED_EXCHRATE INDEX 1 INTO DATA(WA_CPED_EXCHRATE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CPED_EXCHRATE>-CLIENT = 1.
<CPED_EXCHRATE>-PERIODDETERMINATION_UUID = 1.
<CPED_EXCHRATE>-EXCHANGERATE_TIMESTAMP = 1.
<CPED_EXCHRATE>-EXCHANGERATE_TYPE = 1.
<CPED_EXCHRATE>-FROM_CURRENCY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CPED_EXCHRATE-TO_CURRENCY, sy-vline,
  WA_CPED_EXCHRATE-EXCHANGERATE, sy-vline,
  WA_CPED_EXCHRATE-RATIO_FROM_CURRENCY, sy-vline,
  WA_CPED_EXCHRATE-RATIO_TO_CURRENCY, sy-vline,
  WA_CPED_EXCHRATE-SUBSTITUTION_TIMESTAMP, sy-vline,
  WA_CPED_EXCHRATE-CLOSED_MARKET, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CPED_EXCHRATE 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_CPED_EXCHRATE 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_CPED_EXCHRATE INTO WA_CPED_EXCHRATE.


*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_CPED_EXCHRATE_STR, 
CLIENT TYPE STRING,
PERIODDETERMINATION_UUID TYPE STRING,
EXCHANGERATE_TIMESTAMP TYPE STRING,
EXCHANGERATE_TYPE TYPE STRING,
FROM_CURRENCY TYPE STRING,
TO_CURRENCY TYPE STRING,
EXCHANGERATE TYPE STRING,
RATIO_FROM_CURRENCY TYPE STRING,
RATIO_TO_CURRENCY TYPE STRING,
SUBSTITUTION_TIMESTAMP TYPE STRING,
CLOSED_MARKET TYPE STRING,
MISSING TYPE STRING,
SUBSTITUTED TYPE STRING,
IGNORED TYPE STRING,
FORECAST_STATUS TYPE STRING,
SWAP_RATE TYPE STRING,
SPOT_RATE TYPE STRING,
DOCITEM_GUID TYPE STRING,
COND_TYPE TYPE STRING,
TERMNO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CPED_EXCHRATE_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_CPED_EXCHRATE_STR-CLIENT sy-vline 
WA_CPED_EXCHRATE_STR-PERIODDETERMINATION_UUID sy-vline 
WA_CPED_EXCHRATE_STR-EXCHANGERATE_TIMESTAMP sy-vline 
WA_CPED_EXCHRATE_STR-EXCHANGERATE_TYPE sy-vline 
WA_CPED_EXCHRATE_STR-FROM_CURRENCY sy-vline 
WA_CPED_EXCHRATE_STR-TO_CURRENCY sy-vline 
WA_CPED_EXCHRATE_STR-EXCHANGERATE sy-vline 
WA_CPED_EXCHRATE_STR-RATIO_FROM_CURRENCY sy-vline 
WA_CPED_EXCHRATE_STR-RATIO_TO_CURRENCY sy-vline 
WA_CPED_EXCHRATE_STR-SUBSTITUTION_TIMESTAMP sy-vline 
WA_CPED_EXCHRATE_STR-CLOSED_MARKET sy-vline 
WA_CPED_EXCHRATE_STR-MISSING sy-vline 
WA_CPED_EXCHRATE_STR-SUBSTITUTED sy-vline 
WA_CPED_EXCHRATE_STR-IGNORED sy-vline 
WA_CPED_EXCHRATE_STR-FORECAST_STATUS sy-vline 
WA_CPED_EXCHRATE_STR-SWAP_RATE sy-vline 
WA_CPED_EXCHRATE_STR-SPOT_RATE sy-vline 
WA_CPED_EXCHRATE_STR-DOCITEM_GUID sy-vline 
WA_CPED_EXCHRATE_STR-COND_TYPE sy-vline 
WA_CPED_EXCHRATE_STR-TERMNO sy-vline      INTO ld_text SEPARATED BY SPACE.

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