ABAP Select data from SAP table REXCFC_FUELSTOCK_S into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REXCFC_FUELSTOCK_S 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_FUELSTOCK_S. 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_FUELSTOCK_S 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_FUELSTOCK_S TYPE STANDARD TABLE OF REXCFC_FUELSTOCK_S,
      WA_REXCFC_FUELSTOCK_S TYPE REXCFC_FUELSTOCK_S,
      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_FUELSTOCK_S> TYPE REXCFC_FUELSTOCK_S.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXCFC_FUELSTOCK_S
*  INTO TABLE @DATA(IT_REXCFC_FUELSTOCK_S2).
*--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_FUELSTOCK_S INDEX 1 INTO DATA(WA_REXCFC_FUELSTOCK_S2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REXCFC_FUELSTOCK_S>-MANDT = 1.
<REXCFC_FUELSTOCK_S>-INTRENO = 1.
<REXCFC_FUELSTOCK_S>-PROCDATE = 1.
<REXCFC_FUELSTOCK_S>-PSTNGDATE = 1.
<REXCFC_FUELSTOCK_S>-CONTNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REXCFC_FUELSTOCK_S-STOCKIND, sy-vline,
  WA_REXCFC_FUELSTOCK_S-REMARKX, sy-vline,
  WA_REXCFC_FUELSTOCK_S-LIFNR, sy-vline,
  WA_REXCFC_FUELSTOCK_S-QUANTITY, sy-vline,
  WA_REXCFC_FUELSTOCK_S-UNIT, sy-vline,
  WA_REXCFC_FUELSTOCK_S-COST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REXCFC_FUELSTOCK_S 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_FUELSTOCK_S 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_FUELSTOCK_S INTO WA_REXCFC_FUELSTOCK_S.


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

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

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

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_REXCFC_FUELSTOCK_S-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCFC_FUELSTOCK_S-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_FUELSTOCK_S_STR, 
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,
INDDESC TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
DETAIL_INDEX TYPE STRING,
GRID_INDEX TYPE STRING,
KZ TYPE STRING,
QUANTITY_E TYPE STRING,
FSSTATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REXCFC_FUELSTOCK_S_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_FUELSTOCK_S_STR-MANDT sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-INTRENO sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-PROCDATE sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-PSTNGDATE sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-CONTNO sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-STOCKIND sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-REMARKX sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-LIFNR sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-QUANTITY sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-UNIT sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-COST sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-CURR sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-CALCCLOSED sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-BELNR sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-BUZEI sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-BUKRS sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-GJAHR sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-CANCEL sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-POSTINGOBTAX sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-LFDNR sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-DOCDATE sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-CC_OBJNR sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-ACCDETKEY sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-INDDESC sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-NAME1 sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-NAME2 sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-DETAIL_INDEX sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-GRID_INDEX sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-KZ sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-QUANTITY_E sy-vline 
WA_REXCFC_FUELSTOCK_S_STR-FSSTATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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