ABAP Select data from SAP table CRFILE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRFILE
*  INTO TABLE @DATA(IT_CRFILE2).
*--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_CRFILE INDEX 1 INTO DATA(WA_CRFILE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRFILE>-DATUM = 1.
<CRFILE>-UZEIT = 1.
<CRFILE>-UNAME = 1.
<CRFILE>-RECTYP = 1.
<CRFILE>-CCNUM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRFILE-HWAER, sy-vline,
  WA_CRFILE-TRHWBT, sy-vline,
  WA_CRFILE-TRHWSTE, sy-vline,
  WA_CRFILE-SHKZG, sy-vline,
  WA_CRFILE-BUDAT, sy-vline,
  WA_CRFILE-TRDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRFILE 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_CRFILE 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_CRFILE INTO WA_CRFILE.


*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 AU152, internal->external for field TRHWBT
CALL FUNCTION 'CONVERSION_EXIT_AU152_OUTPUT'
  EXPORTING
    input =                      WA_CRFILE-TRHWBT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRFILE-TRHWBT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU152, internal->external for field TRHWSTE
CALL FUNCTION 'CONVERSION_EXIT_AU152_OUTPUT'
  EXPORTING
    input =                      WA_CRFILE-TRHWSTE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRFILE-TRHWSTE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU152, internal->external for field TRFWBT
CALL FUNCTION 'CONVERSION_EXIT_AU152_OUTPUT'
  EXPORTING
    input =                      WA_CRFILE-TRFWBT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRFILE-TRFWBT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU152, internal->external for field TRFWSTE
CALL FUNCTION 'CONVERSION_EXIT_AU152_OUTPUT'
  EXPORTING
    input =                      WA_CRFILE-TRFWSTE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRFILE-TRFWSTE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CRFILE-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRFILE-LIFNR.
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_CRFILE_STR, 
DATUM TYPE STRING,
UZEIT TYPE STRING,
UNAME TYPE STRING,
RECTYP TYPE STRING,
CCNUM TYPE STRING,
HWAER TYPE STRING,
TRHWBT TYPE STRING,
TRHWSTE TYPE STRING,
SHKZG TYPE STRING,
BUDAT TYPE STRING,
TRDAT TYPE STRING,
STDAT TYPE STRING,
AUNUM TYPE STRING,
FWAER TYPE STRING,
TRFWBT TYPE STRING,
TRFWSTE TYPE STRING,
SUPNAM TYPE STRING,
LIFNR TYPE STRING,
MERCAT TYPE STRING,
CRDSCODE TYPE STRING,
XBLNR TYPE STRING,
BKTXT TYPE STRING,
SGTXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRFILE_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_CRFILE_STR-DATUM sy-vline 
WA_CRFILE_STR-UZEIT sy-vline 
WA_CRFILE_STR-UNAME sy-vline 
WA_CRFILE_STR-RECTYP sy-vline 
WA_CRFILE_STR-CCNUM sy-vline 
WA_CRFILE_STR-HWAER sy-vline 
WA_CRFILE_STR-TRHWBT sy-vline 
WA_CRFILE_STR-TRHWSTE sy-vline 
WA_CRFILE_STR-SHKZG sy-vline 
WA_CRFILE_STR-BUDAT sy-vline 
WA_CRFILE_STR-TRDAT sy-vline 
WA_CRFILE_STR-STDAT sy-vline 
WA_CRFILE_STR-AUNUM sy-vline 
WA_CRFILE_STR-FWAER sy-vline 
WA_CRFILE_STR-TRFWBT sy-vline 
WA_CRFILE_STR-TRFWSTE sy-vline 
WA_CRFILE_STR-SUPNAM sy-vline 
WA_CRFILE_STR-LIFNR sy-vline 
WA_CRFILE_STR-MERCAT sy-vline 
WA_CRFILE_STR-CRDSCODE sy-vline 
WA_CRFILE_STR-XBLNR sy-vline 
WA_CRFILE_STR-BKTXT sy-vline 
WA_CRFILE_STR-SGTXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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