ABAP Select data from SAP table CMAINTNTFTETP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMAINTNTFTETP
*  INTO TABLE @DATA(IT_CMAINTNTFTETP2).
*--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_CMAINTNTFTETP INDEX 1 INTO DATA(WA_CMAINTNTFTETP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMAINTNTFTETP>-MANDT = 1.
<CMAINTNTFTETP>-MAINTENANCENOTIFICATION = 1.
<CMAINTNTFTETP>-MAINTENANCEORDER = 1.
<CMAINTNTFTETP>-MAINTENANCEOBJECTISDOWN = 1.
<CMAINTNTFTETP>-MAINTOBJDOWNTIMEDURATIONUNIT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMAINTNTFTETP-MAINTOBJECTDOWNTIMEDURATION, sy-vline,
  WA_CMAINTNTFTETP-TEXTOBJECTCATEGORY, sy-vline,
  WA_CMAINTNTFTETP-TEXTOBJECTTYPE, sy-vline,
  WA_CMAINTNTFTETP-MAINTNOTIFLONGTEXTFOREDIT, sy-vline,
  WA_CMAINTNTFTETP-MALFUNCTIONEFFECT, sy-vline,
  WA_CMAINTNTFTETP-MALFUNCTIONSTARTDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMAINTNTFTETP 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_CMAINTNTFTETP 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_CMAINTNTFTETP INTO WA_CMAINTNTFTETP.


*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_CMAINTNTFTETP-MAINTENANCENOTIFICATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMAINTNTFTETP-MAINTENANCENOTIFICATION.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field MAINTOBJDOWNTIMEDURATIONUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CMAINTNTFTETP-MAINTOBJDOWNTIMEDURATIONUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMAINTNTFTETP-MAINTOBJDOWNTIMEDURATIONUNIT.
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_CMAINTNTFTETP_STR, 
MANDT TYPE STRING,
MAINTENANCENOTIFICATION TYPE STRING,
MAINTENANCEORDER TYPE STRING,
MAINTENANCEOBJECTISDOWN TYPE STRING,
MAINTOBJDOWNTIMEDURATIONUNIT TYPE STRING,
MAINTOBJECTDOWNTIMEDURATION TYPE STRING,
TEXTOBJECTCATEGORY TYPE STRING,
TEXTOBJECTTYPE TYPE STRING,
MAINTNOTIFLONGTEXTFOREDIT TYPE STRING,
MALFUNCTIONEFFECT TYPE STRING,
MALFUNCTIONSTARTDATE TYPE STRING,
MALFUNCTIONSTARTTIME TYPE STRING,
MALFUNCTIONENDDATE TYPE STRING,
MALFUNCTIONENDTIME TYPE STRING,
MAINTNOTIFICATIONCATALOG TYPE STRING,
MAINTNOTIFICATIONCODE TYPE STRING,
MAINTNOTIFICATIONCODEGROUP TYPE STRING,
CATALOGPROFILE TYPE STRING,
MAINTNOTIFDETECTIONCATALOG TYPE STRING,
MAINTNOTIFDETECTIONCODEGROUP TYPE STRING,
MAINTNOTIFDETECTIONCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMAINTNTFTETP_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_CMAINTNTFTETP_STR-MANDT sy-vline 
WA_CMAINTNTFTETP_STR-MAINTENANCENOTIFICATION sy-vline 
WA_CMAINTNTFTETP_STR-MAINTENANCEORDER sy-vline 
WA_CMAINTNTFTETP_STR-MAINTENANCEOBJECTISDOWN sy-vline 
WA_CMAINTNTFTETP_STR-MAINTOBJDOWNTIMEDURATIONUNIT sy-vline 
WA_CMAINTNTFTETP_STR-MAINTOBJECTDOWNTIMEDURATION sy-vline 
WA_CMAINTNTFTETP_STR-TEXTOBJECTCATEGORY sy-vline 
WA_CMAINTNTFTETP_STR-TEXTOBJECTTYPE sy-vline 
WA_CMAINTNTFTETP_STR-MAINTNOTIFLONGTEXTFOREDIT sy-vline 
WA_CMAINTNTFTETP_STR-MALFUNCTIONEFFECT sy-vline 
WA_CMAINTNTFTETP_STR-MALFUNCTIONSTARTDATE sy-vline 
WA_CMAINTNTFTETP_STR-MALFUNCTIONSTARTTIME sy-vline 
WA_CMAINTNTFTETP_STR-MALFUNCTIONENDDATE sy-vline 
WA_CMAINTNTFTETP_STR-MALFUNCTIONENDTIME sy-vline 
WA_CMAINTNTFTETP_STR-MAINTNOTIFICATIONCATALOG sy-vline 
WA_CMAINTNTFTETP_STR-MAINTNOTIFICATIONCODE sy-vline 
WA_CMAINTNTFTETP_STR-MAINTNOTIFICATIONCODEGROUP sy-vline 
WA_CMAINTNTFTETP_STR-CATALOGPROFILE sy-vline 
WA_CMAINTNTFTETP_STR-MAINTNOTIFDETECTIONCATALOG sy-vline 
WA_CMAINTNTFTETP_STR-MAINTNOTIFDETECTIONCODEGROUP sy-vline 
WA_CMAINTNTFTETP_STR-MAINTNOTIFDETECTIONCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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