ABAP Select data from SAP table CMNTNTFROOTIT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMNTNTFROOTIT
*  INTO TABLE @DATA(IT_CMNTNTFROOTIT2).
*--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_CMNTNTFROOTIT INDEX 1 INTO DATA(WA_CMNTNTFROOTIT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMNTNTFROOTIT>-MANDT = 1.
<CMNTNTFROOTIT>-MAINTENANCENOTIFICATIONITEM = 1.
<CMNTNTFROOTIT>-MAINTENANCENOTIFICATION = 1.
<CMNTNTFROOTIT>-MAINTNOTIFITEMTEXT = 1.
<CMNTNTFROOTIT>-MAINTNOTIFOBJPRTCODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMNTNTFROOTIT-MAINTNOTIFOBJPRTCODENAME, sy-vline,
  WA_CMNTNTFROOTIT-MAINTNOTIFICATIONDAMAGECODE, sy-vline,
  WA_CMNTNTFROOTIT-MAINTNOTIFDAMAGECODENAME, sy-vline,
  WA_CMNTNTFROOTIT-MAINTNOTIFICATIONCAUSECODE, sy-vline,
  WA_CMNTNTFROOTIT-MAINTNOTIFICATIONCAUSECODENAME, sy-vline,
  WA_CMNTNTFROOTIT-MAINTNOTIFICATIONACTIVITYCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMNTNTFROOTIT 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_CMNTNTFROOTIT 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_CMNTNTFROOTIT INTO WA_CMNTNTFROOTIT.


*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 MAINTENANCENOTIFICATION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMNTNTFROOTIT-MAINTENANCENOTIFICATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMNTNTFROOTIT-MAINTENANCENOTIFICATION.
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_CMNTNTFROOTIT_STR, 
MANDT TYPE STRING,
MAINTENANCENOTIFICATIONITEM TYPE STRING,
MAINTENANCENOTIFICATION TYPE STRING,
MAINTNOTIFITEMTEXT TYPE STRING,
MAINTNOTIFOBJPRTCODE TYPE STRING,
MAINTNOTIFOBJPRTCODENAME TYPE STRING,
MAINTNOTIFICATIONDAMAGECODE TYPE STRING,
MAINTNOTIFDAMAGECODENAME TYPE STRING,
MAINTNOTIFICATIONCAUSECODE TYPE STRING,
MAINTNOTIFICATIONCAUSECODENAME TYPE STRING,
MAINTNOTIFICATIONACTIVITYCODE TYPE STRING,
MAINTNOTIFACTIVITYCODENAME TYPE STRING,
ISDELETED TYPE STRING,
CREATIONDATE TYPE STRING,
TIMEOFCREATION TYPE STRING,
TECHNICALOBJECT TYPE STRING,
TECHOBJISEQUIPORFUNCNLLOC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMNTNTFROOTIT_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_CMNTNTFROOTIT_STR-MANDT sy-vline 
WA_CMNTNTFROOTIT_STR-MAINTENANCENOTIFICATIONITEM sy-vline 
WA_CMNTNTFROOTIT_STR-MAINTENANCENOTIFICATION sy-vline 
WA_CMNTNTFROOTIT_STR-MAINTNOTIFITEMTEXT sy-vline 
WA_CMNTNTFROOTIT_STR-MAINTNOTIFOBJPRTCODE sy-vline 
WA_CMNTNTFROOTIT_STR-MAINTNOTIFOBJPRTCODENAME sy-vline 
WA_CMNTNTFROOTIT_STR-MAINTNOTIFICATIONDAMAGECODE sy-vline 
WA_CMNTNTFROOTIT_STR-MAINTNOTIFDAMAGECODENAME sy-vline 
WA_CMNTNTFROOTIT_STR-MAINTNOTIFICATIONCAUSECODE sy-vline 
WA_CMNTNTFROOTIT_STR-MAINTNOTIFICATIONCAUSECODENAME sy-vline 
WA_CMNTNTFROOTIT_STR-MAINTNOTIFICATIONACTIVITYCODE sy-vline 
WA_CMNTNTFROOTIT_STR-MAINTNOTIFACTIVITYCODENAME sy-vline 
WA_CMNTNTFROOTIT_STR-ISDELETED sy-vline 
WA_CMNTNTFROOTIT_STR-CREATIONDATE sy-vline 
WA_CMNTNTFROOTIT_STR-TIMEOFCREATION sy-vline 
WA_CMNTNTFROOTIT_STR-TECHNICALOBJECT sy-vline 
WA_CMNTNTFROOTIT_STR-TECHOBJISEQUIPORFUNCNLLOC sy-vline      INTO ld_text SEPARATED BY SPACE.

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