ABAP Select data from SAP table DFS_CAP_MET_D into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DFS_CAP_MET_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 DFS_CAP_MET_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 DFS_CAP_MET_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_DFS_CAP_MET_D TYPE STANDARD TABLE OF DFS_CAP_MET_D,
      WA_DFS_CAP_MET_D TYPE DFS_CAP_MET_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: <DFS_CAP_MET_D> TYPE DFS_CAP_MET_D.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFS_CAP_MET_D
*  INTO TABLE @DATA(IT_DFS_CAP_MET_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_DFS_CAP_MET_D INDEX 1 INTO DATA(WA_DFS_CAP_MET_D2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFS_CAP_MET_D>-MANDT = 1.
<DFS_CAP_MET_D>-MISSIONESSENTIALTASKUUID = 1.
<DFS_CAP_MET_D>-MISSIONESSENTIALTASKID = 1.
<DFS_CAP_MET_D>-MSNESNLTSKNAME = 1.
<DFS_CAP_MET_D>-MSNESNLTSKDESCRIPTION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFS_CAP_MET_D-MSNESNLTSKSHORTNAME, sy-vline,
  WA_DFS_CAP_MET_D-MSNESNLTSKVALIDITYSTARTDTE, sy-vline,
  WA_DFS_CAP_MET_D-MSNESNLTSKVALIDITYENDDTE, sy-vline,
  WA_DFS_CAP_MET_D-MSNESNLTSKCREATIONDTETME, sy-vline,
  WA_DFS_CAP_MET_D-MSNESNLTSKCREATEDBYUSER, sy-vline,
  WA_DFS_CAP_MET_D-MSNESNLTSKLASTCHGDDTETME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFS_CAP_MET_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_DFS_CAP_MET_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_DFS_CAP_MET_D INTO WA_DFS_CAP_MET_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 MISSIONESSENTIALTASKID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFS_CAP_MET_D-MISSIONESSENTIALTASKID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFS_CAP_MET_D-MISSIONESSENTIALTASKID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MSNESNLTSKPARENTID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFS_CAP_MET_D-MSNESNLTSKPARENTID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFS_CAP_MET_D-MSNESNLTSKPARENTID.
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_DFS_CAP_MET_D_STR, 
MANDT TYPE STRING,
MISSIONESSENTIALTASKUUID TYPE STRING,
MISSIONESSENTIALTASKID TYPE STRING,
MSNESNLTSKNAME TYPE STRING,
MSNESNLTSKDESCRIPTION TYPE STRING,
MSNESNLTSKSHORTNAME TYPE STRING,
MSNESNLTSKVALIDITYSTARTDTE TYPE STRING,
MSNESNLTSKVALIDITYENDDTE TYPE STRING,
MSNESNLTSKCREATIONDTETME TYPE STRING,
MSNESNLTSKCREATEDBYUSER TYPE STRING,
MSNESNLTSKLASTCHGDDTETME TYPE STRING,
MSNESNLTSKLASTCHGDBYUSER TYPE STRING,
MSNESNLTSKTYPE TYPE STRING,
MSNESNLTSKISROOTTASK TYPE STRING,
MSNESNLTSKSTATUSOBJECTID TYPE STRING,
MSNESNLTSKSTATUSCODE TYPE STRING,
MSNESNLTSKTRNGPLNTEXT TYPE STRING,
MSNESNLTSKPARENTUUID TYPE STRING,
MSNESNLTSKROOTUUID TYPE STRING,
DFSCAPBLTSTMNTSQNCNMBR TYPE STRING,
MSNESNLTSKPARENTID TYPE STRING,
MSNESNLTSKPARENTNAME TYPE STRING,
DFSCAPABILITYOBJECTID TYPE STRING,
ACTIVEUUID TYPE STRING,
HASACTIVEENTITY TYPE STRING,
DRAFTENTITYCREATIONDATETIME TYPE STRING,
DRAFTENTITYLASTCHANGEDATETIME TYPE STRING,
DRAFTADMINISTRATIVEDATAUUID TYPE STRING,
DRAFTENTITYCONSISTENCYSTATUS TYPE STRING,
DRAFTENTITYOPERATIONCODE TYPE STRING,
DUMMY_DFS_CAP_METL_INCL_EEW_PS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFS_CAP_MET_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_DFS_CAP_MET_D_STR-MANDT sy-vline 
WA_DFS_CAP_MET_D_STR-MISSIONESSENTIALTASKUUID sy-vline 
WA_DFS_CAP_MET_D_STR-MISSIONESSENTIALTASKID sy-vline 
WA_DFS_CAP_MET_D_STR-MSNESNLTSKNAME sy-vline 
WA_DFS_CAP_MET_D_STR-MSNESNLTSKDESCRIPTION sy-vline 
WA_DFS_CAP_MET_D_STR-MSNESNLTSKSHORTNAME sy-vline 
WA_DFS_CAP_MET_D_STR-MSNESNLTSKVALIDITYSTARTDTE sy-vline 
WA_DFS_CAP_MET_D_STR-MSNESNLTSKVALIDITYENDDTE sy-vline 
WA_DFS_CAP_MET_D_STR-MSNESNLTSKCREATIONDTETME sy-vline 
WA_DFS_CAP_MET_D_STR-MSNESNLTSKCREATEDBYUSER sy-vline 
WA_DFS_CAP_MET_D_STR-MSNESNLTSKLASTCHGDDTETME sy-vline 
WA_DFS_CAP_MET_D_STR-MSNESNLTSKLASTCHGDBYUSER sy-vline 
WA_DFS_CAP_MET_D_STR-MSNESNLTSKTYPE sy-vline 
WA_DFS_CAP_MET_D_STR-MSNESNLTSKISROOTTASK sy-vline 
WA_DFS_CAP_MET_D_STR-MSNESNLTSKSTATUSOBJECTID sy-vline 
WA_DFS_CAP_MET_D_STR-MSNESNLTSKSTATUSCODE sy-vline 
WA_DFS_CAP_MET_D_STR-MSNESNLTSKTRNGPLNTEXT sy-vline 
WA_DFS_CAP_MET_D_STR-MSNESNLTSKPARENTUUID sy-vline 
WA_DFS_CAP_MET_D_STR-MSNESNLTSKROOTUUID sy-vline 
WA_DFS_CAP_MET_D_STR-DFSCAPBLTSTMNTSQNCNMBR sy-vline 
WA_DFS_CAP_MET_D_STR-MSNESNLTSKPARENTID sy-vline 
WA_DFS_CAP_MET_D_STR-MSNESNLTSKPARENTNAME sy-vline 
WA_DFS_CAP_MET_D_STR-DFSCAPABILITYOBJECTID sy-vline 
WA_DFS_CAP_MET_D_STR-ACTIVEUUID sy-vline 
WA_DFS_CAP_MET_D_STR-HASACTIVEENTITY sy-vline 
WA_DFS_CAP_MET_D_STR-DRAFTENTITYCREATIONDATETIME sy-vline 
WA_DFS_CAP_MET_D_STR-DRAFTENTITYLASTCHANGEDATETIME sy-vline 
WA_DFS_CAP_MET_D_STR-DRAFTADMINISTRATIVEDATAUUID sy-vline 
WA_DFS_CAP_MET_D_STR-DRAFTENTITYCONSISTENCYSTATUS sy-vline 
WA_DFS_CAP_MET_D_STR-DRAFTENTITYOPERATIONCODE sy-vline 
WA_DFS_CAP_MET_D_STR-DUMMY_DFS_CAP_METL_INCL_EEW_PS sy-vline      INTO ld_text SEPARATED BY SPACE.

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