ABAP Select data from SAP table REXCFC_FUELSTOCK_X 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_X 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_X. 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_X 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_X TYPE STANDARD TABLE OF REXCFC_FUELSTOCK_X,
      WA_REXCFC_FUELSTOCK_X TYPE REXCFC_FUELSTOCK_X,
      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_X> TYPE REXCFC_FUELSTOCK_X.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXCFC_FUELSTOCK_X
*  INTO TABLE @DATA(IT_REXCFC_FUELSTOCK_X2).
*--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_X INDEX 1 INTO DATA(WA_REXCFC_FUELSTOCK_X2).


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

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

ENDLOOP.

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

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


*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_X-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCFC_FUELSTOCK_X-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_X-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCFC_FUELSTOCK_X-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_X-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCFC_FUELSTOCK_X-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_X-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCFC_FUELSTOCK_X-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_X_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,END OF T_EKKO_STR.
DATA: WA_REXCFC_FUELSTOCK_X_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_X_STR-MANDT sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-INTRENO sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-PROCDATE sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-PSTNGDATE sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-CONTNO sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-STOCKIND sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-REMARKX sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-LIFNR sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-QUANTITY sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-UNIT sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-COST sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-CURR sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-CALCCLOSED sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-BELNR sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-BUZEI sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-BUKRS sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-GJAHR sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-CANCEL sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-POSTINGOBTAX sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-LFDNR sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-DOCDATE sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-CC_OBJNR sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-ACCDETKEY sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-INDDESC sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-NAME1 sy-vline 
WA_REXCFC_FUELSTOCK_X_STR-NAME2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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