ABAP Select data from SAP table MAINTNOTIFACTV_D into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MAINTNOTIFACTV_D
*  INTO TABLE @DATA(IT_MAINTNOTIFACTV_D2).
*--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_MAINTNOTIFACTV_D INDEX 1 INTO DATA(WA_MAINTNOTIFACTV_D2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MAINTNOTIFACTV_D>-MANDT = 1.
<MAINTNOTIFACTV_D>-DRAFTUUID = 1.
<MAINTNOTIFACTV_D>-PARENTDRAFTUUID = 1.
<MAINTNOTIFACTV_D>-MAINTNOTIFICATIONACTIVITY = 1.
<MAINTNOTIFACTV_D>-MAINTENANCENOTIFICATION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MAINTNOTIFACTV_D-MAINTNOTIFACTIVITYFOREDIT, sy-vline,
  WA_MAINTNOTIFACTV_D-MAINTENANCENOTIFICATIONITEM, sy-vline,
  WA_MAINTNOTIFACTV_D-MAINTNOTIFACTYTXT, sy-vline,
  WA_MAINTNOTIFACTV_D-MAINTNOTIFACTIVITYCODECATALOG, sy-vline,
  WA_MAINTNOTIFACTV_D-MAINTNOTIFICATIONACTIVITYCODE, sy-vline,
  WA_MAINTNOTIFACTV_D-MAINTNOTIFACTIVITYCODEGROUP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MAINTNOTIFACTV_D 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_MAINTNOTIFACTV_D 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_MAINTNOTIFACTV_D INTO WA_MAINTNOTIFACTV_D.


*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_MAINTNOTIFACTV_D-MAINTENANCENOTIFICATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MAINTNOTIFACTV_D-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_MAINTNOTIFACTV_D_STR, 
MANDT TYPE STRING,
DRAFTUUID TYPE STRING,
PARENTDRAFTUUID TYPE STRING,
MAINTNOTIFICATIONACTIVITY TYPE STRING,
MAINTENANCENOTIFICATION TYPE STRING,
MAINTNOTIFACTIVITYFOREDIT TYPE STRING,
MAINTENANCENOTIFICATIONITEM TYPE STRING,
MAINTNOTIFACTYTXT TYPE STRING,
MAINTNOTIFACTIVITYCODECATALOG TYPE STRING,
MAINTNOTIFICATIONACTIVITYCODE TYPE STRING,
MAINTNOTIFACTIVITYCODEGROUP TYPE STRING,
ISDELETED TYPE STRING,
CREATEDBYUSER TYPE STRING,
PLANNEDSTARTDATE TYPE STRING,
PLANNEDSTARTTIME TYPE STRING,
MAINTNOTIFACTYQTYFACTOR TYPE STRING,
PLANNEDENDDATE TYPE STRING,
PLANNEDENDTIME TYPE STRING,
MAINTNOTIFACTIVITYSORTNUMBER TYPE STRING,
HASACTIVEENTITY TYPE STRING,
DRAFTENTITYCREATIONDATETIME TYPE STRING,
DRAFTENTITYLASTCHANGEDATETIME TYPE STRING,
DRAFTADMINISTRATIVEDATAUUID TYPE STRING,
DRAFTENTITYCONSISTENCYSTATUS TYPE STRING,
DRAFTENTITYOPERATIONCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MAINTNOTIFACTV_D_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_MAINTNOTIFACTV_D_STR-MANDT sy-vline 
WA_MAINTNOTIFACTV_D_STR-DRAFTUUID sy-vline 
WA_MAINTNOTIFACTV_D_STR-PARENTDRAFTUUID sy-vline 
WA_MAINTNOTIFACTV_D_STR-MAINTNOTIFICATIONACTIVITY sy-vline 
WA_MAINTNOTIFACTV_D_STR-MAINTENANCENOTIFICATION sy-vline 
WA_MAINTNOTIFACTV_D_STR-MAINTNOTIFACTIVITYFOREDIT sy-vline 
WA_MAINTNOTIFACTV_D_STR-MAINTENANCENOTIFICATIONITEM sy-vline 
WA_MAINTNOTIFACTV_D_STR-MAINTNOTIFACTYTXT sy-vline 
WA_MAINTNOTIFACTV_D_STR-MAINTNOTIFACTIVITYCODECATALOG sy-vline 
WA_MAINTNOTIFACTV_D_STR-MAINTNOTIFICATIONACTIVITYCODE sy-vline 
WA_MAINTNOTIFACTV_D_STR-MAINTNOTIFACTIVITYCODEGROUP sy-vline 
WA_MAINTNOTIFACTV_D_STR-ISDELETED sy-vline 
WA_MAINTNOTIFACTV_D_STR-CREATEDBYUSER sy-vline 
WA_MAINTNOTIFACTV_D_STR-PLANNEDSTARTDATE sy-vline 
WA_MAINTNOTIFACTV_D_STR-PLANNEDSTARTTIME sy-vline 
WA_MAINTNOTIFACTV_D_STR-MAINTNOTIFACTYQTYFACTOR sy-vline 
WA_MAINTNOTIFACTV_D_STR-PLANNEDENDDATE sy-vline 
WA_MAINTNOTIFACTV_D_STR-PLANNEDENDTIME sy-vline 
WA_MAINTNOTIFACTV_D_STR-MAINTNOTIFACTIVITYSORTNUMBER sy-vline 
WA_MAINTNOTIFACTV_D_STR-HASACTIVEENTITY sy-vline 
WA_MAINTNOTIFACTV_D_STR-DRAFTENTITYCREATIONDATETIME sy-vline 
WA_MAINTNOTIFACTV_D_STR-DRAFTENTITYLASTCHANGEDATETIME sy-vline 
WA_MAINTNOTIFACTV_D_STR-DRAFTADMINISTRATIVEDATAUUID sy-vline 
WA_MAINTNOTIFACTV_D_STR-DRAFTENTITYCONSISTENCYSTATUS sy-vline 
WA_MAINTNOTIFACTV_D_STR-DRAFTENTITYOPERATIONCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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