ABAP Select data from SAP table REXCFC_FUELLIST_L into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXCFC_FUELLIST_L
*  INTO TABLE @DATA(IT_REXCFC_FUELLIST_L2).
*--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_REXCFC_FUELLIST_L INDEX 1 INTO DATA(WA_REXCFC_FUELLIST_L2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REXCFC_FUELLIST_L>-REASON = 1.
<REXCFC_FUELLIST_L>-IMKEY = 1.
<REXCFC_FUELLIST_L>-SWENR = 1.
<REXCFC_FUELLIST_L>-SNKSL = 1.
<REXCFC_FUELLIST_L>-SEMPSL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REXCFC_FUELLIST_L-TAXAMOUNT, sy-vline,
  WA_REXCFC_FUELLIST_L-DEDTAXAMT, sy-vline,
  WA_REXCFC_FUELLIST_L-NONDEDTAXAMT, sy-vline,
  WA_REXCFC_FUELLIST_L-MWSTS, sy-vline,
  WA_REXCFC_FUELLIST_L-DMBTR, sy-vline,
  WA_REXCFC_FUELLIST_L-DEDTAXAMTLC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REXCFC_FUELLIST_L 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_REXCFC_FUELLIST_L 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_REXCFC_FUELLIST_L INTO WA_REXCFC_FUELLIST_L.


*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 IMKEY, internal->external for field IMKEY
CALL FUNCTION 'CONVERSION_EXIT_IMKEY_OUTPUT'
  EXPORTING
    input =                      WA_REXCFC_FUELLIST_L-IMKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCFC_FUELLIST_L-IMKEY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SWENR, internal->external for field SWENR
CALL FUNCTION 'CONVERSION_EXIT_SWENR_OUTPUT'
  EXPORTING
    input =                      WA_REXCFC_FUELLIST_L-SWENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCFC_FUELLIST_L-SWENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SNKSL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXCFC_FUELLIST_L-SNKSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCFC_FUELLIST_L-SNKSL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SEMPSL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXCFC_FUELLIST_L-SEMPSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCFC_FUELLIST_L-SEMPSL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXCFC_FUELLIST_L-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCFC_FUELLIST_L-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REXCFC_FUELLIST_L-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCFC_FUELLIST_L-UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXCFC_FUELLIST_L-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCFC_FUELLIST_L-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_REXCFC_FUELLIST_L-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCFC_FUELLIST_L-GJAHR.
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_REXCFC_FUELLIST_L_STR, 
REASON TYPE STRING,
IMKEY TYPE STRING,
SWENR TYPE STRING,
SNKSL TYPE STRING,
SEMPSL TYPE STRING,
TAXAMOUNT TYPE STRING,
DEDTAXAMT TYPE STRING,
NONDEDTAXAMT TYPE STRING,
MWSTS TYPE STRING,
DMBTR TYPE STRING,
DEDTAXAMTLC TYPE STRING,
NONDEDTAXAMTLC TYPE STRING,
HWAER TYPE STRING,
MANDT TYPE STRING,
INTRENO TYPE STRING,
PROCDATE TYPE STRING,
PSTNGDATE TYPE STRING,
CONTNO TYPE STRING,
STOCKIND TYPE STRING,
REMARKX TYPE STRING,
LIFNR TYPE STRING,
QUANTITY TYPE STRING,
UNIT TYPE STRING,
COST TYPE STRING,
CURR TYPE STRING,
CALCCLOSED TYPE STRING,
BELNR TYPE STRING,
BUZEI TYPE STRING,
BUKRS TYPE STRING,
GJAHR TYPE STRING,
CANCEL TYPE STRING,
POSTINGOBTAX TYPE STRING,
LFDNR TYPE STRING,
DOCDATE TYPE STRING,
CC_OBJNR TYPE STRING,
ACCDETKEY TYPE STRING,
ICON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REXCFC_FUELLIST_L_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_REXCFC_FUELLIST_L_STR-REASON sy-vline 
WA_REXCFC_FUELLIST_L_STR-IMKEY sy-vline 
WA_REXCFC_FUELLIST_L_STR-SWENR sy-vline 
WA_REXCFC_FUELLIST_L_STR-SNKSL sy-vline 
WA_REXCFC_FUELLIST_L_STR-SEMPSL sy-vline 
WA_REXCFC_FUELLIST_L_STR-TAXAMOUNT sy-vline 
WA_REXCFC_FUELLIST_L_STR-DEDTAXAMT sy-vline 
WA_REXCFC_FUELLIST_L_STR-NONDEDTAXAMT sy-vline 
WA_REXCFC_FUELLIST_L_STR-MWSTS sy-vline 
WA_REXCFC_FUELLIST_L_STR-DMBTR sy-vline 
WA_REXCFC_FUELLIST_L_STR-DEDTAXAMTLC sy-vline 
WA_REXCFC_FUELLIST_L_STR-NONDEDTAXAMTLC sy-vline 
WA_REXCFC_FUELLIST_L_STR-HWAER sy-vline 
WA_REXCFC_FUELLIST_L_STR-MANDT sy-vline 
WA_REXCFC_FUELLIST_L_STR-INTRENO sy-vline 
WA_REXCFC_FUELLIST_L_STR-PROCDATE sy-vline 
WA_REXCFC_FUELLIST_L_STR-PSTNGDATE sy-vline 
WA_REXCFC_FUELLIST_L_STR-CONTNO sy-vline 
WA_REXCFC_FUELLIST_L_STR-STOCKIND sy-vline 
WA_REXCFC_FUELLIST_L_STR-REMARKX sy-vline 
WA_REXCFC_FUELLIST_L_STR-LIFNR sy-vline 
WA_REXCFC_FUELLIST_L_STR-QUANTITY sy-vline 
WA_REXCFC_FUELLIST_L_STR-UNIT sy-vline 
WA_REXCFC_FUELLIST_L_STR-COST sy-vline 
WA_REXCFC_FUELLIST_L_STR-CURR sy-vline 
WA_REXCFC_FUELLIST_L_STR-CALCCLOSED sy-vline 
WA_REXCFC_FUELLIST_L_STR-BELNR sy-vline 
WA_REXCFC_FUELLIST_L_STR-BUZEI sy-vline 
WA_REXCFC_FUELLIST_L_STR-BUKRS sy-vline 
WA_REXCFC_FUELLIST_L_STR-GJAHR sy-vline 
WA_REXCFC_FUELLIST_L_STR-CANCEL sy-vline 
WA_REXCFC_FUELLIST_L_STR-POSTINGOBTAX sy-vline 
WA_REXCFC_FUELLIST_L_STR-LFDNR sy-vline 
WA_REXCFC_FUELLIST_L_STR-DOCDATE sy-vline 
WA_REXCFC_FUELLIST_L_STR-CC_OBJNR sy-vline 
WA_REXCFC_FUELLIST_L_STR-ACCDETKEY sy-vline 
WA_REXCFC_FUELLIST_L_STR-ICON sy-vline      INTO ld_text SEPARATED BY SPACE.

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