ABAP Select data from SAP table CPET_PDT_EXCHRATE_WRK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CPET_PDT_EXCHRATE_WRK
*  INTO TABLE @DATA(IT_CPET_PDT_EXCHRATE_WRK2).
*--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_CPET_PDT_EXCHRATE_WRK INDEX 1 INTO DATA(WA_CPET_PDT_EXCHRATE_WRK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CPET_PDT_EXCHRATE_WRK>-PERIODDTOUT_GUID = 1.
<CPET_PDT_EXCHRATE_WRK>-KURST = 1.
<CPET_PDT_EXCHRATE_WRK>-FCURR = 1.
<CPET_PDT_EXCHRATE_WRK>-TCURR = 1.
<CPET_PDT_EXCHRATE_WRK>-CURRDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CPET_PDT_EXCHRATE_WRK-CURRTIME, sy-vline,
  WA_CPET_PDT_EXCHRATE_WRK-UKURS, sy-vline,
  WA_CPET_PDT_EXCHRATE_WRK-FFACT, sy-vline,
  WA_CPET_PDT_EXCHRATE_WRK-TFACT, sy-vline,
  WA_CPET_PDT_EXCHRATE_WRK-REQUESTED, sy-vline,
  WA_CPET_PDT_EXCHRATE_WRK-CLOSED_MARKET, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CPET_PDT_EXCHRATE_WRK 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_CPET_PDT_EXCHRATE_WRK 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_CPET_PDT_EXCHRATE_WRK INTO WA_CPET_PDT_EXCHRATE_WRK.


*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 EXCRT, internal->external for field UKURS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_CPET_PDT_EXCHRATE_WRK-UKURS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CPET_PDT_EXCHRATE_WRK-UKURS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field SWAP_RATE
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_CPET_PDT_EXCHRATE_WRK-SWAP_RATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CPET_PDT_EXCHRATE_WRK-SWAP_RATE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field SPOT_RATE
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_CPET_PDT_EXCHRATE_WRK-SPOT_RATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CPET_PDT_EXCHRATE_WRK-SPOT_RATE.
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_CPET_PDT_EXCHRATE_WRK_STR, 
PERIODDTOUT_GUID TYPE STRING,
KURST TYPE STRING,
FCURR TYPE STRING,
TCURR TYPE STRING,
CURRDATE TYPE STRING,
CURRTIME TYPE STRING,
UKURS TYPE STRING,
FFACT TYPE STRING,
TFACT TYPE STRING,
REQUESTED TYPE STRING,
CLOSED_MARKET TYPE STRING,
MISSING TYPE STRING,
SUBST_DATE TYPE STRING,
SUBST_TIME TYPE STRING,
SUBSTITUTED TYPE STRING,
IGNORED TYPE STRING,
INCOMPLETE TYPE STRING,
BILLING_BLOCK TYPE STRING,
FORECAST_STATUS TYPE STRING,
SWAP_RATE TYPE STRING,
SPOT_RATE TYPE STRING,
INTERPOLATED TYPE STRING,
READ_BACK TYPE STRING,
UPDKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CPET_PDT_EXCHRATE_WRK_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_CPET_PDT_EXCHRATE_WRK_STR-PERIODDTOUT_GUID sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-KURST sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-FCURR sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-TCURR sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-CURRDATE sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-CURRTIME sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-UKURS sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-FFACT sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-TFACT sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-REQUESTED sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-CLOSED_MARKET sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-MISSING sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-SUBST_DATE sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-SUBST_TIME sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-SUBSTITUTED sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-IGNORED sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-INCOMPLETE sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-BILLING_BLOCK sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-FORECAST_STATUS sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-SWAP_RATE sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-SPOT_RATE sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-INTERPOLATED sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-READ_BACK sy-vline 
WA_CPET_PDT_EXCHRATE_WRK_STR-UPDKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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