ABAP Select data from SAP table FMED_S_REVERSAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FMED_S_REVERSAL
*  INTO TABLE @DATA(IT_FMED_S_REVERSAL2).
*--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_FMED_S_REVERSAL INDEX 1 INTO DATA(WA_FMED_S_REVERSAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FMED_S_REVERSAL>-DOCSTATE = 1.
<FMED_S_REVERSAL>-DOCDATE = 1.
<FMED_S_REVERSAL>-POSTDATE = 1.
<FMED_S_REVERSAL>-REASON_REV = 1.
<FMED_S_REVERSAL>-TECHORG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FMED_S_REVERSAL-TEXTNAME, sy-vline,
  WA_FMED_S_REVERSAL-TEXT50, sy-vline,
  WA_FMED_S_REVERSAL-AWORG, sy-vline,
  WA_FMED_S_REVERSAL-AWREF, sy-vline,
  WA_FMED_S_REVERSAL-AWSYS, sy-vline,
  WA_FMED_S_REVERSAL-AWTYP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FMED_S_REVERSAL 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_FMED_S_REVERSAL 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_FMED_S_REVERSAL INTO WA_FMED_S_REVERSAL.


*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 AWREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FMED_S_REVERSAL-AWREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMED_S_REVERSAL-AWREF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AWSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FMED_S_REVERSAL-AWSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMED_S_REVERSAL-AWSYS.
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_FMED_S_REVERSAL_STR, 
DOCSTATE TYPE STRING,
DOCDATE TYPE STRING,
POSTDATE TYPE STRING,
REASON_REV TYPE STRING,
TECHORG TYPE STRING,
TEXTNAME TYPE STRING,
TEXT50 TYPE STRING,
AWORG TYPE STRING,
AWREF TYPE STRING,
AWSYS TYPE STRING,
AWTYP TYPE STRING,
AWKEY TYPE STRING,
DUMMY_BCS_DOC_EXT TYPE STRING,
PFM_FOA TYPE STRING,
PFM_SPEC TYPE STRING,
INCLUDE TYPE STRING,
PFM_FOA TYPE STRING,
PFM_SPEC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FMED_S_REVERSAL_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_FMED_S_REVERSAL_STR-DOCSTATE sy-vline 
WA_FMED_S_REVERSAL_STR-DOCDATE sy-vline 
WA_FMED_S_REVERSAL_STR-POSTDATE sy-vline 
WA_FMED_S_REVERSAL_STR-REASON_REV sy-vline 
WA_FMED_S_REVERSAL_STR-TECHORG sy-vline 
WA_FMED_S_REVERSAL_STR-TEXTNAME sy-vline 
WA_FMED_S_REVERSAL_STR-TEXT50 sy-vline 
WA_FMED_S_REVERSAL_STR-AWORG sy-vline 
WA_FMED_S_REVERSAL_STR-AWREF sy-vline 
WA_FMED_S_REVERSAL_STR-AWSYS sy-vline 
WA_FMED_S_REVERSAL_STR-AWTYP sy-vline 
WA_FMED_S_REVERSAL_STR-AWKEY sy-vline 
WA_FMED_S_REVERSAL_STR-DUMMY_BCS_DOC_EXT sy-vline 
WA_FMED_S_REVERSAL_STR-PFM_FOA sy-vline 
WA_FMED_S_REVERSAL_STR-PFM_SPEC sy-vline 
WA_FMED_S_REVERSAL_STR-INCLUDE sy-vline 
WA_FMED_S_REVERSAL_STR-PFM_FOA sy-vline 
WA_FMED_S_REVERSAL_STR-PFM_SPEC sy-vline      INTO ld_text SEPARATED BY SPACE.

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