ABAP Select data from SAP table DISMOB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DISMOB
*  INTO TABLE @DATA(IT_DISMOB2).
*--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_DISMOB INDEX 1 INTO DATA(WA_DISMOB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DISMOB>-CLIENT = 1.
<DISMOB>-ISMNR = 1.
<DISMOB>-ISMVR = 1.
<DISMOB>-ITEMNR = 1.
<DISMOB>-OBJTYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DISMOB-OBJKEY, sy-vline,
  WA_DISMOB-OBDOMNAME, sy-vline,
  WA_DISMOB-REFSTRUCT, sy-vline,
  WA_DISMOB-REFFIELD, sy-vline,
  WA_DISMOB-ERNAM, sy-vline,
  WA_DISMOB-ERDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DISMOB 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_DISMOB 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_DISMOB INTO WA_DISMOB.


*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 ISMNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DISMOB-ISMNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DISMOB-ISMNR.
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_DISMOB_STR, 
CLIENT TYPE STRING,
ISMNR TYPE STRING,
ISMVR TYPE STRING,
ITEMNR TYPE STRING,
OBJTYP TYPE STRING,
OBJKEY TYPE STRING,
OBDOMNAME TYPE STRING,
REFSTRUCT TYPE STRING,
REFFIELD TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
AETIM TYPE STRING,
FLGDEL TYPE STRING,
BORTXT TYPE STRING,
OBTXT TYPE STRING,
EXTOBJKEY TYPE STRING,
ATTDESCR TYPE STRING,
ISOBSEL TYPE STRING,
FLGUPD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DISMOB_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_DISMOB_STR-CLIENT sy-vline 
WA_DISMOB_STR-ISMNR sy-vline 
WA_DISMOB_STR-ISMVR sy-vline 
WA_DISMOB_STR-ITEMNR sy-vline 
WA_DISMOB_STR-OBJTYP sy-vline 
WA_DISMOB_STR-OBJKEY sy-vline 
WA_DISMOB_STR-OBDOMNAME sy-vline 
WA_DISMOB_STR-REFSTRUCT sy-vline 
WA_DISMOB_STR-REFFIELD sy-vline 
WA_DISMOB_STR-ERNAM sy-vline 
WA_DISMOB_STR-ERDAT sy-vline 
WA_DISMOB_STR-ERTIM sy-vline 
WA_DISMOB_STR-AENAM sy-vline 
WA_DISMOB_STR-AEDAT sy-vline 
WA_DISMOB_STR-AETIM sy-vline 
WA_DISMOB_STR-FLGDEL sy-vline 
WA_DISMOB_STR-BORTXT sy-vline 
WA_DISMOB_STR-OBTXT sy-vline 
WA_DISMOB_STR-EXTOBJKEY sy-vline 
WA_DISMOB_STR-ATTDESCR sy-vline 
WA_DISMOB_STR-ISOBSEL sy-vline 
WA_DISMOB_STR-FLGUPD sy-vline      INTO ld_text SEPARATED BY SPACE.

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