ABAP Select data from SAP table DMU_DOCUMENT_EXT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DMU_DOCUMENT_EXT
*  INTO TABLE @DATA(IT_DMU_DOCUMENT_EXT2).
*--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_DMU_DOCUMENT_EXT INDEX 1 INTO DATA(WA_DMU_DOCUMENT_EXT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DMU_DOCUMENT_EXT>-DOCUMENTTYPE = 1.
<DMU_DOCUMENT_EXT>-DOCUMENTNUMBER = 1.
<DMU_DOCUMENT_EXT>-DOCUMENTVERSION = 1.
<DMU_DOCUMENT_EXT>-DOCUMENTPART = 1.
<DMU_DOCUMENT_EXT>-DESCRIPTION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DMU_DOCUMENT_EXT-USERNAME, sy-vline,
  WA_DMU_DOCUMENT_EXT-STATUSEXTERN, sy-vline,
  WA_DMU_DOCUMENT_EXT-STATUSINTERN, sy-vline,
  WA_DMU_DOCUMENT_EXT-STATUSLOG, sy-vline,
  WA_DMU_DOCUMENT_EXT-LABORATORY, sy-vline,
  WA_DMU_DOCUMENT_EXT-ECNUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DMU_DOCUMENT_EXT 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_DMU_DOCUMENT_EXT 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_DMU_DOCUMENT_EXT INTO WA_DMU_DOCUMENT_EXT.


*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 DOCUMENTNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DMU_DOCUMENT_EXT-DOCUMENTNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DMU_DOCUMENT_EXT-DOCUMENTNUMBER.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit NUMCV, internal->external for field REVLEVEL
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_DMU_DOCUMENT_EXT-REVLEVEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DMU_DOCUMENT_EXT-REVLEVEL.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field ECRID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DMU_DOCUMENT_EXT-ECRID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DMU_DOCUMENT_EXT-ECRID.
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_DMU_DOCUMENT_EXT_STR, 
DOCUMENTTYPE TYPE STRING,
DOCUMENTNUMBER TYPE STRING,
DOCUMENTVERSION TYPE STRING,
DOCUMENTPART TYPE STRING,
DESCRIPTION TYPE STRING,
USERNAME TYPE STRING,
STATUSEXTERN TYPE STRING,
STATUSINTERN TYPE STRING,
STATUSLOG TYPE STRING,
LABORATORY TYPE STRING,
ECNUMBER TYPE STRING,
VALIDFROMDATE TYPE STRING,
REVLEVEL TYPE STRING,
DELETEINDICATOR TYPE STRING,
CADINDICATOR TYPE STRING,
STRUCTUREINDICATOR TYPE STRING,
PREDOCUMENTNUMBER TYPE STRING,
PREDOCUMENTVERSION TYPE STRING,
PREDOCUMENTPART TYPE STRING,
PREDOCUMENTTYPE TYPE STRING,
AUTHORITYGROUP TYPE STRING,
DOCFILE1 TYPE STRING,
DATACARRIER1 TYPE STRING,
WSAPPLICATION1 TYPE STRING,
DOCFILE2 TYPE STRING,
DATACARRIER2 TYPE STRING,
WSAPPLICATION2 TYPE STRING,
VRLDAT TYPE STRING,
USERDEFINED1 TYPE STRING,
USERDEFINED2 TYPE STRING,
USERDEFINED3 TYPE STRING,
USERDEFINED4 TYPE STRING,
SAVEDOCFILE1 TYPE STRING,
SAVEDATACARRIER1 TYPE STRING,
SAVEDOCFILE2 TYPE STRING,
SAVEDATACARRIER2 TYPE STRING,
CREATEDATE TYPE STRING,
REFDOCUMENTNUMBER TYPE STRING,
REFDOCUMENTPART TYPE STRING,
REFDOCUMENTVERSION TYPE STRING,
FILESIZE1 TYPE STRING,
FILESIZE2 TYPE STRING,
CMFIXED TYPE STRING,
CMRELEVANCE TYPE STRING,
GUID_IDENT TYPE STRING,
GUID_PRED TYPE STRING,
LOCATION_IDENT TYPE STRING,
LOCATION_PRED TYPE STRING,
FLG_STKO TYPE STRING,
COLOR TYPE STRING,
ACTUAL_VERSION TYPE STRING,
VIRTUAL TYPE STRING,
MESSAGE TYPE STRING,
NO_DISPLAY_AUTH TYPE STRING,
DUMMY TYPE STRING,
AUTH_ACC_ID_EXTERNAL TYPE STRING,
AUTH_ACC_ID_INTERNAL TYPE STRING,
AUTH_ACC_ID_READ TYPE STRING,
AUTH_ACC_DESCRIPTION TYPE STRING,
AUTH_ACC_MULTI TYPE STRING,
ECRID TYPE STRING,
ECRID_READ TYPE STRING,
MULTI_ECR TYPE STRING,
ECR_DESCRIPTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DMU_DOCUMENT_EXT_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_DMU_DOCUMENT_EXT_STR-DOCUMENTTYPE sy-vline 
WA_DMU_DOCUMENT_EXT_STR-DOCUMENTNUMBER sy-vline 
WA_DMU_DOCUMENT_EXT_STR-DOCUMENTVERSION sy-vline 
WA_DMU_DOCUMENT_EXT_STR-DOCUMENTPART sy-vline 
WA_DMU_DOCUMENT_EXT_STR-DESCRIPTION sy-vline 
WA_DMU_DOCUMENT_EXT_STR-USERNAME sy-vline 
WA_DMU_DOCUMENT_EXT_STR-STATUSEXTERN sy-vline 
WA_DMU_DOCUMENT_EXT_STR-STATUSINTERN sy-vline 
WA_DMU_DOCUMENT_EXT_STR-STATUSLOG sy-vline 
WA_DMU_DOCUMENT_EXT_STR-LABORATORY sy-vline 
WA_DMU_DOCUMENT_EXT_STR-ECNUMBER sy-vline 
WA_DMU_DOCUMENT_EXT_STR-VALIDFROMDATE sy-vline 
WA_DMU_DOCUMENT_EXT_STR-REVLEVEL sy-vline 
WA_DMU_DOCUMENT_EXT_STR-DELETEINDICATOR sy-vline 
WA_DMU_DOCUMENT_EXT_STR-CADINDICATOR sy-vline 
WA_DMU_DOCUMENT_EXT_STR-STRUCTUREINDICATOR sy-vline 
WA_DMU_DOCUMENT_EXT_STR-PREDOCUMENTNUMBER sy-vline 
WA_DMU_DOCUMENT_EXT_STR-PREDOCUMENTVERSION sy-vline 
WA_DMU_DOCUMENT_EXT_STR-PREDOCUMENTPART sy-vline 
WA_DMU_DOCUMENT_EXT_STR-PREDOCUMENTTYPE sy-vline 
WA_DMU_DOCUMENT_EXT_STR-AUTHORITYGROUP sy-vline 
WA_DMU_DOCUMENT_EXT_STR-DOCFILE1 sy-vline 
WA_DMU_DOCUMENT_EXT_STR-DATACARRIER1 sy-vline 
WA_DMU_DOCUMENT_EXT_STR-WSAPPLICATION1 sy-vline 
WA_DMU_DOCUMENT_EXT_STR-DOCFILE2 sy-vline 
WA_DMU_DOCUMENT_EXT_STR-DATACARRIER2 sy-vline 
WA_DMU_DOCUMENT_EXT_STR-WSAPPLICATION2 sy-vline 
WA_DMU_DOCUMENT_EXT_STR-VRLDAT sy-vline 
WA_DMU_DOCUMENT_EXT_STR-USERDEFINED1 sy-vline 
WA_DMU_DOCUMENT_EXT_STR-USERDEFINED2 sy-vline 
WA_DMU_DOCUMENT_EXT_STR-USERDEFINED3 sy-vline 
WA_DMU_DOCUMENT_EXT_STR-USERDEFINED4 sy-vline 
WA_DMU_DOCUMENT_EXT_STR-SAVEDOCFILE1 sy-vline 
WA_DMU_DOCUMENT_EXT_STR-SAVEDATACARRIER1 sy-vline 
WA_DMU_DOCUMENT_EXT_STR-SAVEDOCFILE2 sy-vline 
WA_DMU_DOCUMENT_EXT_STR-SAVEDATACARRIER2 sy-vline 
WA_DMU_DOCUMENT_EXT_STR-CREATEDATE sy-vline 
WA_DMU_DOCUMENT_EXT_STR-REFDOCUMENTNUMBER sy-vline 
WA_DMU_DOCUMENT_EXT_STR-REFDOCUMENTPART sy-vline 
WA_DMU_DOCUMENT_EXT_STR-REFDOCUMENTVERSION sy-vline 
WA_DMU_DOCUMENT_EXT_STR-FILESIZE1 sy-vline 
WA_DMU_DOCUMENT_EXT_STR-FILESIZE2 sy-vline 
WA_DMU_DOCUMENT_EXT_STR-CMFIXED sy-vline 
WA_DMU_DOCUMENT_EXT_STR-CMRELEVANCE sy-vline 
WA_DMU_DOCUMENT_EXT_STR-GUID_IDENT sy-vline 
WA_DMU_DOCUMENT_EXT_STR-GUID_PRED sy-vline 
WA_DMU_DOCUMENT_EXT_STR-LOCATION_IDENT sy-vline 
WA_DMU_DOCUMENT_EXT_STR-LOCATION_PRED sy-vline 
WA_DMU_DOCUMENT_EXT_STR-FLG_STKO sy-vline 
WA_DMU_DOCUMENT_EXT_STR-COLOR sy-vline 
WA_DMU_DOCUMENT_EXT_STR-ACTUAL_VERSION sy-vline 
WA_DMU_DOCUMENT_EXT_STR-VIRTUAL sy-vline 
WA_DMU_DOCUMENT_EXT_STR-MESSAGE sy-vline 
WA_DMU_DOCUMENT_EXT_STR-NO_DISPLAY_AUTH sy-vline 
WA_DMU_DOCUMENT_EXT_STR-DUMMY sy-vline 
WA_DMU_DOCUMENT_EXT_STR-AUTH_ACC_ID_EXTERNAL sy-vline 
WA_DMU_DOCUMENT_EXT_STR-AUTH_ACC_ID_INTERNAL sy-vline 
WA_DMU_DOCUMENT_EXT_STR-AUTH_ACC_ID_READ sy-vline 
WA_DMU_DOCUMENT_EXT_STR-AUTH_ACC_DESCRIPTION sy-vline 
WA_DMU_DOCUMENT_EXT_STR-AUTH_ACC_MULTI sy-vline 
WA_DMU_DOCUMENT_EXT_STR-ECRID sy-vline 
WA_DMU_DOCUMENT_EXT_STR-ECRID_READ sy-vline 
WA_DMU_DOCUMENT_EXT_STR-MULTI_ECR sy-vline 
WA_DMU_DOCUMENT_EXT_STR-ECR_DESCRIPTION sy-vline      INTO ld_text SEPARATED BY SPACE.

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