ABAP Select data from SAP table REXC_FUELSTOCK_C into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXC_FUELSTOCK_C
*  INTO TABLE @DATA(IT_REXC_FUELSTOCK_C2).
*--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_REXC_FUELSTOCK_C INDEX 1 INTO DATA(WA_REXC_FUELSTOCK_C2).


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

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

ENDLOOP.

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

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


*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_REXC_FUELSTOCK_C-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXC_FUELSTOCK_C-LIFNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_REXC_FUELSTOCK_C-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXC_FUELSTOCK_C-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_REXC_FUELSTOCK_C_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,
GROSS TYPE STRING,
TAX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REXC_FUELSTOCK_C_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_REXC_FUELSTOCK_C_STR-MANDT sy-vline 
WA_REXC_FUELSTOCK_C_STR-INTRENO sy-vline 
WA_REXC_FUELSTOCK_C_STR-PROCDATE sy-vline 
WA_REXC_FUELSTOCK_C_STR-PSTNGDATE sy-vline 
WA_REXC_FUELSTOCK_C_STR-CONTNO sy-vline 
WA_REXC_FUELSTOCK_C_STR-STOCKIND sy-vline 
WA_REXC_FUELSTOCK_C_STR-REMARKX sy-vline 
WA_REXC_FUELSTOCK_C_STR-LIFNR sy-vline 
WA_REXC_FUELSTOCK_C_STR-QUANTITY sy-vline 
WA_REXC_FUELSTOCK_C_STR-UNIT sy-vline 
WA_REXC_FUELSTOCK_C_STR-COST sy-vline 
WA_REXC_FUELSTOCK_C_STR-CURR sy-vline 
WA_REXC_FUELSTOCK_C_STR-CALCCLOSED sy-vline 
WA_REXC_FUELSTOCK_C_STR-BELNR sy-vline 
WA_REXC_FUELSTOCK_C_STR-BUZEI sy-vline 
WA_REXC_FUELSTOCK_C_STR-BUKRS sy-vline 
WA_REXC_FUELSTOCK_C_STR-GJAHR sy-vline 
WA_REXC_FUELSTOCK_C_STR-CANCEL sy-vline 
WA_REXC_FUELSTOCK_C_STR-POSTINGOBTAX sy-vline 
WA_REXC_FUELSTOCK_C_STR-LFDNR sy-vline 
WA_REXC_FUELSTOCK_C_STR-DOCDATE sy-vline 
WA_REXC_FUELSTOCK_C_STR-CC_OBJNR sy-vline 
WA_REXC_FUELSTOCK_C_STR-ACCDETKEY sy-vline 
WA_REXC_FUELSTOCK_C_STR-GROSS sy-vline 
WA_REXC_FUELSTOCK_C_STR-TAX sy-vline      INTO ld_text SEPARATED BY SPACE.

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