ABAP Select data from SAP table /SAPAPO/DMCS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/DMCS 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 /SAPAPO/DMCS. 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 /SAPAPO/DMCS 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_/SAPAPO/DMCS TYPE STANDARD TABLE OF /SAPAPO/DMCS,
      WA_/SAPAPO/DMCS TYPE /SAPAPO/DMCS,
      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: </SAPAPO/DMCS> TYPE /SAPAPO/DMCS.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/DMCS
  INTO TABLE IT_/SAPAPO/DMCS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/DMCS
*  INTO TABLE @DATA(IT_/SAPAPO/DMCS2).
*--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_/SAPAPO/DMCS INDEX 1 INTO DATA(WA_/SAPAPO/DMCS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/DMCS ASSIGNING </SAPAPO/DMCS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/DMCS>-VTNAM = 1.
</SAPAPO/DMCS>-VTTXT = 1.
</SAPAPO/DMCS>-MANDT = 1.
</SAPAPO/DMCS>-SELKZ = 1.
</SAPAPO/DMCS>-SPRAS = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/DMCS INTO WA_/SAPAPO/DMCS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/DMCS-JPROT, sy-vline,
  WA_/SAPAPO/DMCS-VTSTA, sy-vline,
  WA_/SAPAPO/DMCS-VTGRU, sy-vline,
  WA_/SAPAPO/DMCS-VTAUT_STRU, sy-vline,
  WA_/SAPAPO/DMCS-CRNAM_STRU, sy-vline,
  WA_/SAPAPO/DMCS-CRDAT_STRU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/DMCS 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_/SAPAPO/DMCS 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_/SAPAPO/DMCS INTO WA_/SAPAPO/DMCS.


*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 ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/DMCS-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/DMCS-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ECMNO_CONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/DMCS-ECMNO_CONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/DMCS-ECMNO_CONT.
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_/SAPAPO/DMCS_STR, 
VTNAM TYPE STRING,
VTTXT TYPE STRING,
MANDT TYPE STRING,
SELKZ TYPE STRING,
SPRAS TYPE STRING,
JPROT TYPE STRING,
VTSTA TYPE STRING,
VTGRU TYPE STRING,
VTAUT_STRU TYPE STRING,
CRNAM_STRU TYPE STRING,
CRDAT_STRU TYPE STRING,
CHNAM_STRU TYPE STRING,
CHDAT_STRU TYPE STRING,
CHNAM_CONT TYPE STRING,
CHDAT_CONT TYPE STRING,
ECMNO_CONT TYPE STRING,
ACNAM_DBCON TYPE STRING,
ACDAT_DBCON TYPE STRING,
ACTIM_DBCON TYPE STRING,
VTAUT_CONT TYPE STRING,
DBTAB_NAME TYPE STRING,
DBCON_ACTI TYPE STRING,
VTDCT TYPE STRING,
ATNAM TYPE STRING,
ATBEZ TYPE STRING,
DBFLD TYPE STRING,
ATKEY TYPE STRING,
RFTAB TYPE STRING,
VTSTX TYPE STRING,
VTGRT TYPE STRING,
DATUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/DMCS_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_/SAPAPO/DMCS_STR-VTNAM sy-vline 
WA_/SAPAPO/DMCS_STR-VTTXT sy-vline 
WA_/SAPAPO/DMCS_STR-MANDT sy-vline 
WA_/SAPAPO/DMCS_STR-SELKZ sy-vline 
WA_/SAPAPO/DMCS_STR-SPRAS sy-vline 
WA_/SAPAPO/DMCS_STR-JPROT sy-vline 
WA_/SAPAPO/DMCS_STR-VTSTA sy-vline 
WA_/SAPAPO/DMCS_STR-VTGRU sy-vline 
WA_/SAPAPO/DMCS_STR-VTAUT_STRU sy-vline 
WA_/SAPAPO/DMCS_STR-CRNAM_STRU sy-vline 
WA_/SAPAPO/DMCS_STR-CRDAT_STRU sy-vline 
WA_/SAPAPO/DMCS_STR-CHNAM_STRU sy-vline 
WA_/SAPAPO/DMCS_STR-CHDAT_STRU sy-vline 
WA_/SAPAPO/DMCS_STR-CHNAM_CONT sy-vline 
WA_/SAPAPO/DMCS_STR-CHDAT_CONT sy-vline 
WA_/SAPAPO/DMCS_STR-ECMNO_CONT sy-vline 
WA_/SAPAPO/DMCS_STR-ACNAM_DBCON sy-vline 
WA_/SAPAPO/DMCS_STR-ACDAT_DBCON sy-vline 
WA_/SAPAPO/DMCS_STR-ACTIM_DBCON sy-vline 
WA_/SAPAPO/DMCS_STR-VTAUT_CONT sy-vline 
WA_/SAPAPO/DMCS_STR-DBTAB_NAME sy-vline 
WA_/SAPAPO/DMCS_STR-DBCON_ACTI sy-vline 
WA_/SAPAPO/DMCS_STR-VTDCT sy-vline 
WA_/SAPAPO/DMCS_STR-ATNAM sy-vline 
WA_/SAPAPO/DMCS_STR-ATBEZ sy-vline 
WA_/SAPAPO/DMCS_STR-DBFLD sy-vline 
WA_/SAPAPO/DMCS_STR-ATKEY sy-vline 
WA_/SAPAPO/DMCS_STR-RFTAB sy-vline 
WA_/SAPAPO/DMCS_STR-VTSTX sy-vline 
WA_/SAPAPO/DMCS_STR-VTGRT sy-vline 
WA_/SAPAPO/DMCS_STR-DATUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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