ABAP Select data from SAP table FMSE_CMMT_ITEM_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FMSE_CMMT_ITEM_DATA
*  INTO TABLE @DATA(IT_FMSE_CMMT_ITEM_DATA2).
*--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_FMSE_CMMT_ITEM_DATA INDEX 1 INTO DATA(WA_FMSE_CMMT_ITEM_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FMSE_CMMT_ITEM_DATA>-KATEG = 1.
<FMSE_CMMT_ITEM_DATA>-FIVOR = 1.
<FMSE_CMMT_ITEM_DATA>-POTYP = 1.
<FMSE_CMMT_ITEM_DATA>-FPART = 1.
<FMSE_CMMT_ITEM_DATA>-FIPUP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FMSE_CMMT_ITEM_DATA-VPTYP, sy-vline,
  WA_FMSE_CMMT_ITEM_DATA-STATS, sy-vline,
  WA_FMSE_CMMT_ITEM_DATA-NCBUD, sy-vline,
  WA_FMSE_CMMT_ITEM_DATA-AUGRP, sy-vline,
  WA_FMSE_CMMT_ITEM_DATA-NEGBUD, sy-vline,
  WA_FMSE_CMMT_ITEM_DATA-DATAB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FMSE_CMMT_ITEM_DATA 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_FMSE_CMMT_ITEM_DATA 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_FMSE_CMMT_ITEM_DATA INTO WA_FMSE_CMMT_ITEM_DATA.


*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 FMCIL, internal->external for field FIPUP
CALL FUNCTION 'CONVERSION_EXIT_FMCIL_OUTPUT'
  EXPORTING
    input =                      WA_FMSE_CMMT_ITEM_DATA-FIPUP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMSE_CMMT_ITEM_DATA-FIPUP.
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_FMSE_CMMT_ITEM_DATA_STR, 
KATEG TYPE STRING,
FIVOR TYPE STRING,
POTYP TYPE STRING,
FPART TYPE STRING,
FIPUP TYPE STRING,
VPTYP TYPE STRING,
STATS TYPE STRING,
NCBUD TYPE STRING,
AUGRP TYPE STRING,
NEGBUD TYPE STRING,
DATAB TYPE STRING,
DATBIS TYPE STRING,
DATE_EXP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FMSE_CMMT_ITEM_DATA_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_FMSE_CMMT_ITEM_DATA_STR-KATEG sy-vline 
WA_FMSE_CMMT_ITEM_DATA_STR-FIVOR sy-vline 
WA_FMSE_CMMT_ITEM_DATA_STR-POTYP sy-vline 
WA_FMSE_CMMT_ITEM_DATA_STR-FPART sy-vline 
WA_FMSE_CMMT_ITEM_DATA_STR-FIPUP sy-vline 
WA_FMSE_CMMT_ITEM_DATA_STR-VPTYP sy-vline 
WA_FMSE_CMMT_ITEM_DATA_STR-STATS sy-vline 
WA_FMSE_CMMT_ITEM_DATA_STR-NCBUD sy-vline 
WA_FMSE_CMMT_ITEM_DATA_STR-AUGRP sy-vline 
WA_FMSE_CMMT_ITEM_DATA_STR-NEGBUD sy-vline 
WA_FMSE_CMMT_ITEM_DATA_STR-DATAB sy-vline 
WA_FMSE_CMMT_ITEM_DATA_STR-DATBIS sy-vline 
WA_FMSE_CMMT_ITEM_DATA_STR-DATE_EXP sy-vline      INTO ld_text SEPARATED BY SPACE.

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