ABAP Select data from SAP table COEP_ALLCUR_CURRKEYS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM COEP_ALLCUR_CURRKEYS
*  INTO TABLE @DATA(IT_COEP_ALLCUR_CURRKEYS2).
*--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_COEP_ALLCUR_CURRKEYS INDEX 1 INTO DATA(WA_COEP_ALLCUR_CURRKEYS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<COEP_ALLCUR_CURRKEYS>-TWAER = 1.
<COEP_ALLCUR_CURRKEYS>-KWAER = 1.
<COEP_ALLCUR_CURRKEYS>-OWAER = 1.
<COEP_ALLCUR_CURRKEYS>-AWAER = 1.
<COEP_ALLCUR_CURRKEYS>-VWAER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_COEP_ALLCUR_CURRKEYS-BWAER, sy-vline,
  WA_COEP_ALLCUR_CURRKEYS-CWAER, sy-vline,
  WA_COEP_ALLCUR_CURRKEYS-DWAER, sy-vline,
  WA_COEP_ALLCUR_CURRKEYS-EWAER, sy-vline,
  WA_COEP_ALLCUR_CURRKEYS-FWAER, sy-vline,
  WA_COEP_ALLCUR_CURRKEYS-GWAER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_COEP_ALLCUR_CURRKEYS 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_COEP_ALLCUR_CURRKEYS 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_COEP_ALLCUR_CURRKEYS INTO WA_COEP_ALLCUR_CURRKEYS.


*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_COEP_ALLCUR_CURRKEYS_STR, 
TWAER TYPE STRING,
KWAER TYPE STRING,
OWAER TYPE STRING,
AWAER TYPE STRING,
VWAER TYPE STRING,
BWAER TYPE STRING,
CWAER TYPE STRING,
DWAER TYPE STRING,
EWAER TYPE STRING,
FWAER TYPE STRING,
GWAER TYPE STRING,
HWAER TYPE STRING,
SWAER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_COEP_ALLCUR_CURRKEYS_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_COEP_ALLCUR_CURRKEYS_STR-TWAER sy-vline 
WA_COEP_ALLCUR_CURRKEYS_STR-KWAER sy-vline 
WA_COEP_ALLCUR_CURRKEYS_STR-OWAER sy-vline 
WA_COEP_ALLCUR_CURRKEYS_STR-AWAER sy-vline 
WA_COEP_ALLCUR_CURRKEYS_STR-VWAER sy-vline 
WA_COEP_ALLCUR_CURRKEYS_STR-BWAER sy-vline 
WA_COEP_ALLCUR_CURRKEYS_STR-CWAER sy-vline 
WA_COEP_ALLCUR_CURRKEYS_STR-DWAER sy-vline 
WA_COEP_ALLCUR_CURRKEYS_STR-EWAER sy-vline 
WA_COEP_ALLCUR_CURRKEYS_STR-FWAER sy-vline 
WA_COEP_ALLCUR_CURRKEYS_STR-GWAER sy-vline 
WA_COEP_ALLCUR_CURRKEYS_STR-HWAER sy-vline 
WA_COEP_ALLCUR_CURRKEYS_STR-SWAER sy-vline      INTO ld_text SEPARATED BY SPACE.

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