ABAP Select data from SAP table MAINTNOTIFITEM_D into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MAINTNOTIFITEM_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 MAINTNOTIFITEM_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 MAINTNOTIFITEM_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_MAINTNOTIFITEM_D TYPE STANDARD TABLE OF MAINTNOTIFITEM_D,
      WA_MAINTNOTIFITEM_D TYPE MAINTNOTIFITEM_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: <MAINTNOTIFITEM_D> TYPE MAINTNOTIFITEM_D.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MAINTNOTIFITEM_D
*  INTO TABLE @DATA(IT_MAINTNOTIFITEM_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_MAINTNOTIFITEM_D INDEX 1 INTO DATA(WA_MAINTNOTIFITEM_D2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MAINTNOTIFITEM_D-MAINTNOTIFICATIONITEMFOREDIT, sy-vline,
  WA_MAINTNOTIFITEM_D-MAINTNOTIFITEMTEXT, sy-vline,
  WA_MAINTNOTIFITEM_D-MAINTNOTIFDAMAGECODECATALOG, sy-vline,
  WA_MAINTNOTIFITEM_D-MAINTNOTIFICATIONDAMAGECODE, sy-vline,
  WA_MAINTNOTIFITEM_D-MAINTNOTIFDAMAGECODEGROUP, sy-vline,
  WA_MAINTNOTIFITEM_D-MAINTNOTIFOBJPRTCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MAINTNOTIFITEM_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_MAINTNOTIFITEM_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_MAINTNOTIFITEM_D INTO WA_MAINTNOTIFITEM_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_MAINTNOTIFITEM_D-MAINTENANCENOTIFICATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MAINTNOTIFITEM_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_MAINTNOTIFITEM_D_STR, 
MANDT TYPE STRING,
DRAFTUUID TYPE STRING,
PARENTDRAFTUUID TYPE STRING,
MAINTENANCENOTIFICATION TYPE STRING,
MAINTENANCENOTIFICATIONITEM TYPE STRING,
MAINTNOTIFICATIONITEMFOREDIT TYPE STRING,
MAINTNOTIFITEMTEXT TYPE STRING,
MAINTNOTIFDAMAGECODECATALOG TYPE STRING,
MAINTNOTIFICATIONDAMAGECODE TYPE STRING,
MAINTNOTIFDAMAGECODEGROUP TYPE STRING,
MAINTNOTIFOBJPRTCODE TYPE STRING,
MAINTNOTIFOBJPRTCODEGROUP TYPE STRING,
MAINTNOTIFOBJPRTCODECATALOG TYPE STRING,
ISDELETED 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_MAINTNOTIFITEM_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_MAINTNOTIFITEM_D_STR-MANDT sy-vline 
WA_MAINTNOTIFITEM_D_STR-DRAFTUUID sy-vline 
WA_MAINTNOTIFITEM_D_STR-PARENTDRAFTUUID sy-vline 
WA_MAINTNOTIFITEM_D_STR-MAINTENANCENOTIFICATION sy-vline 
WA_MAINTNOTIFITEM_D_STR-MAINTENANCENOTIFICATIONITEM sy-vline 
WA_MAINTNOTIFITEM_D_STR-MAINTNOTIFICATIONITEMFOREDIT sy-vline 
WA_MAINTNOTIFITEM_D_STR-MAINTNOTIFITEMTEXT sy-vline 
WA_MAINTNOTIFITEM_D_STR-MAINTNOTIFDAMAGECODECATALOG sy-vline 
WA_MAINTNOTIFITEM_D_STR-MAINTNOTIFICATIONDAMAGECODE sy-vline 
WA_MAINTNOTIFITEM_D_STR-MAINTNOTIFDAMAGECODEGROUP sy-vline 
WA_MAINTNOTIFITEM_D_STR-MAINTNOTIFOBJPRTCODE sy-vline 
WA_MAINTNOTIFITEM_D_STR-MAINTNOTIFOBJPRTCODEGROUP sy-vline 
WA_MAINTNOTIFITEM_D_STR-MAINTNOTIFOBJPRTCODECATALOG sy-vline 
WA_MAINTNOTIFITEM_D_STR-ISDELETED sy-vline 
WA_MAINTNOTIFITEM_D_STR-HASACTIVEENTITY sy-vline 
WA_MAINTNOTIFITEM_D_STR-DRAFTENTITYCREATIONDATETIME sy-vline 
WA_MAINTNOTIFITEM_D_STR-DRAFTENTITYLASTCHANGEDATETIME sy-vline 
WA_MAINTNOTIFITEM_D_STR-DRAFTADMINISTRATIVEDATAUUID sy-vline 
WA_MAINTNOTIFITEM_D_STR-DRAFTENTITYCONSISTENCYSTATUS sy-vline 
WA_MAINTNOTIFITEM_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.