ABAP Select data from SAP table CTOMAINTNOTIF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CTOMAINTNOTIF
*  INTO TABLE @DATA(IT_CTOMAINTNOTIF2).
*--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_CTOMAINTNOTIF INDEX 1 INTO DATA(WA_CTOMAINTNOTIF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CTOMAINTNOTIF>-MANDT = 1.
<CTOMAINTNOTIF>-MAINTENANCENOTIFICATION = 1.
<CTOMAINTNOTIF>-NOTIFICATIONTEXT = 1.
<CTOMAINTNOTIF>-NOTIFICATIONTYPE = 1.
<CTOMAINTNOTIF>-NOTIFICATIONTYPENAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CTOMAINTNOTIF-TECHNICALOBJECTLABEL, sy-vline,
  WA_CTOMAINTNOTIF-TECHNICALOBJECTDESCRIPTION, sy-vline,
  WA_CTOMAINTNOTIF-TECHOBJISEQUIPORFUNCNLLOC, sy-vline,
  WA_CTOMAINTNOTIF-TECHOBJISEQUIPORFUNCNLLOCDESC, sy-vline,
  WA_CTOMAINTNOTIF-MAINTPRIORITY, sy-vline,
  WA_CTOMAINTNOTIF-MAINTPRIORITYDESC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CTOMAINTNOTIF 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_CTOMAINTNOTIF 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_CTOMAINTNOTIF INTO WA_CTOMAINTNOTIF.


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

*Conversion exit TECHO, internal->external for field TECHNICALOBJECTLABEL
CALL FUNCTION 'CONVERSION_EXIT_TECHO_OUTPUT'
  EXPORTING
    input =                      WA_CTOMAINTNOTIF-TECHNICALOBJECTLABEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CTOMAINTNOTIF-TECHNICALOBJECTLABEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field ASSEMBLY
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CTOMAINTNOTIF-ASSEMBLY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CTOMAINTNOTIF-ASSEMBLY.
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_CTOMAINTNOTIF_STR, 
MANDT TYPE STRING,
MAINTENANCENOTIFICATION TYPE STRING,
NOTIFICATIONTEXT TYPE STRING,
NOTIFICATIONTYPE TYPE STRING,
NOTIFICATIONTYPENAME TYPE STRING,
TECHNICALOBJECTLABEL TYPE STRING,
TECHNICALOBJECTDESCRIPTION TYPE STRING,
TECHOBJISEQUIPORFUNCNLLOC TYPE STRING,
TECHOBJISEQUIPORFUNCNLLOCDESC TYPE STRING,
MAINTPRIORITY TYPE STRING,
MAINTPRIORITYDESC TYPE STRING,
CONCATENATEDACTIVESYSTSTSNAME TYPE STRING,
MAINTENANCEPLANNINGPLANT TYPE STRING,
MAINTENANCEPLANNINGPLANTNAME TYPE STRING,
MAINTENANCEPLANNERGROUP TYPE STRING,
MAINTENANCEPLANNERGROUPNAME TYPE STRING,
ABCINDICATOR TYPE STRING,
ABCINDICATORDESC TYPE STRING,
CREATIONDATE TYPE STRING,
CREATIONTIME TYPE STRING,
CONCATENATEDACTIVEUSERSTSNAME TYPE STRING,
CREATEDBYUSER TYPE STRING,
ASSEMBLY TYPE STRING,
ASSEMBLYNAME TYPE STRING,
MALFUNCTIONSTARTDATE TYPE STRING,
MALFUNCTIONSTARTTIME TYPE STRING,
MALFUNCTIONENDDATE TYPE STRING,
MALFUNCTIONENDTIME TYPE STRING,
MAINTENANCEWORKCENTER TYPE STRING,
MAINTENANCEWORKCENTERTEXT TYPE STRING,
REQUIREDSTARTDATE TYPE STRING,
REQUIREDSTARTTIME TYPE STRING,
REQUIREDENDDATE TYPE STRING,
REQUIREDENDTIME TYPE STRING,
MAINTENANCEWORKCENTERPLANT TYPE STRING,
MAINTENANCEWORKCENTERPLANTNAME TYPE STRING,
ASSETLOCATION TYPE STRING,
ASSETLOCATIONNAME TYPE STRING,
ASSETROOM TYPE STRING,
MAINTENANCEPLANT TYPE STRING,
MAINTENANCEPLANTNAME TYPE STRING,
PLANTSECTION TYPE STRING,
MAINTPRIORITYTYPE TYPE STRING,
TECHNICALOBJECT TYPE STRING,
AUTHORIZATIONGROUP TYPE STRING,
MAINTNOTIFINTERNALID TYPE STRING,
MAINTENANCEORDERTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CTOMAINTNOTIF_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_CTOMAINTNOTIF_STR-MANDT sy-vline 
WA_CTOMAINTNOTIF_STR-MAINTENANCENOTIFICATION sy-vline 
WA_CTOMAINTNOTIF_STR-NOTIFICATIONTEXT sy-vline 
WA_CTOMAINTNOTIF_STR-NOTIFICATIONTYPE sy-vline 
WA_CTOMAINTNOTIF_STR-NOTIFICATIONTYPENAME sy-vline 
WA_CTOMAINTNOTIF_STR-TECHNICALOBJECTLABEL sy-vline 
WA_CTOMAINTNOTIF_STR-TECHNICALOBJECTDESCRIPTION sy-vline 
WA_CTOMAINTNOTIF_STR-TECHOBJISEQUIPORFUNCNLLOC sy-vline 
WA_CTOMAINTNOTIF_STR-TECHOBJISEQUIPORFUNCNLLOCDESC sy-vline 
WA_CTOMAINTNOTIF_STR-MAINTPRIORITY sy-vline 
WA_CTOMAINTNOTIF_STR-MAINTPRIORITYDESC sy-vline 
WA_CTOMAINTNOTIF_STR-CONCATENATEDACTIVESYSTSTSNAME sy-vline 
WA_CTOMAINTNOTIF_STR-MAINTENANCEPLANNINGPLANT sy-vline 
WA_CTOMAINTNOTIF_STR-MAINTENANCEPLANNINGPLANTNAME sy-vline 
WA_CTOMAINTNOTIF_STR-MAINTENANCEPLANNERGROUP sy-vline 
WA_CTOMAINTNOTIF_STR-MAINTENANCEPLANNERGROUPNAME sy-vline 
WA_CTOMAINTNOTIF_STR-ABCINDICATOR sy-vline 
WA_CTOMAINTNOTIF_STR-ABCINDICATORDESC sy-vline 
WA_CTOMAINTNOTIF_STR-CREATIONDATE sy-vline 
WA_CTOMAINTNOTIF_STR-CREATIONTIME sy-vline 
WA_CTOMAINTNOTIF_STR-CONCATENATEDACTIVEUSERSTSNAME sy-vline 
WA_CTOMAINTNOTIF_STR-CREATEDBYUSER sy-vline 
WA_CTOMAINTNOTIF_STR-ASSEMBLY sy-vline 
WA_CTOMAINTNOTIF_STR-ASSEMBLYNAME sy-vline 
WA_CTOMAINTNOTIF_STR-MALFUNCTIONSTARTDATE sy-vline 
WA_CTOMAINTNOTIF_STR-MALFUNCTIONSTARTTIME sy-vline 
WA_CTOMAINTNOTIF_STR-MALFUNCTIONENDDATE sy-vline 
WA_CTOMAINTNOTIF_STR-MALFUNCTIONENDTIME sy-vline 
WA_CTOMAINTNOTIF_STR-MAINTENANCEWORKCENTER sy-vline 
WA_CTOMAINTNOTIF_STR-MAINTENANCEWORKCENTERTEXT sy-vline 
WA_CTOMAINTNOTIF_STR-REQUIREDSTARTDATE sy-vline 
WA_CTOMAINTNOTIF_STR-REQUIREDSTARTTIME sy-vline 
WA_CTOMAINTNOTIF_STR-REQUIREDENDDATE sy-vline 
WA_CTOMAINTNOTIF_STR-REQUIREDENDTIME sy-vline 
WA_CTOMAINTNOTIF_STR-MAINTENANCEWORKCENTERPLANT sy-vline 
WA_CTOMAINTNOTIF_STR-MAINTENANCEWORKCENTERPLANTNAME sy-vline 
WA_CTOMAINTNOTIF_STR-ASSETLOCATION sy-vline 
WA_CTOMAINTNOTIF_STR-ASSETLOCATIONNAME sy-vline 
WA_CTOMAINTNOTIF_STR-ASSETROOM sy-vline 
WA_CTOMAINTNOTIF_STR-MAINTENANCEPLANT sy-vline 
WA_CTOMAINTNOTIF_STR-MAINTENANCEPLANTNAME sy-vline 
WA_CTOMAINTNOTIF_STR-PLANTSECTION sy-vline 
WA_CTOMAINTNOTIF_STR-MAINTPRIORITYTYPE sy-vline 
WA_CTOMAINTNOTIF_STR-TECHNICALOBJECT sy-vline 
WA_CTOMAINTNOTIF_STR-AUTHORIZATIONGROUP sy-vline 
WA_CTOMAINTNOTIF_STR-MAINTNOTIFINTERNALID sy-vline 
WA_CTOMAINTNOTIF_STR-MAINTENANCEORDERTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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