ABAP Select data from SAP table DMCSE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DMCSE
*  INTO TABLE @DATA(IT_DMCSE2).
*--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_DMCSE INDEX 1 INTO DATA(WA_DMCSE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DMCSE>-MANDT = 1.
<DMCSE>-ZEITP = 1.
<DMCSE>-CSTRU = 1.
<DMCSE>-SPRAS = 1.
<DMCSE>-ZPTXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DMCSE-MCATX, sy-vline,
  WA_DMCSE-KAPPL, sy-vline,
  WA_DMCSE-STAFO, sy-vline,
  WA_DMCSE-SFTXT, sy-vline,
  WA_DMCSE-FGROUP, sy-vline,
  WA_DMCSE-KEYFELD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DMCSE 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_DMCSE 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_DMCSE INTO WA_DMCSE.


*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_DMCSE-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DMCSE-SPRAS.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_DMCSE-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DMCSE-DATATYPE.
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_DMCSE_STR, 
MANDT TYPE STRING,
ZEITP TYPE STRING,
CSTRU TYPE STRING,
SPRAS TYPE STRING,
ZPTXT TYPE STRING,
MCATX TYPE STRING,
KAPPL TYPE STRING,
STAFO TYPE STRING,
SFTXT TYPE STRING,
FGROUP TYPE STRING,
KEYFELD TYPE STRING,
FBSNAME TYPE STRING,
FIDOC TYPE STRING,
FKOME TYPE STRING,
FKOMM TYPE STRING,
PONOC TYPE STRING,
PORFC TYPE STRING,
POCPI TYPE STRING,
POFIL TYPE STRING,
CSTRU1 TYPE STRING,
FIELD1 TYPE STRING,
KEYFD1 TYPE STRING,
LOGFD1 TYPE STRING,
CSTRU2 TYPE STRING,
FIELD2 TYPE STRING,
KEYFD2 TYPE STRING,
LOGFD2 TYPE STRING,
FDTXT1 TYPE STRING,
FDTXT2 TYPE STRING,
LOGSYS TYPE STRING,
LOGTXT TYPE STRING,
PARNUM TYPE STRING,
PORT TYPE STRING,
PORTTXT TYPE STRING,
CIMTYP TYPE STRING,
OBJECT TYPE STRING,
SEGTYP TYPE STRING,
MINNOSEG TYPE STRING,
MAXNOSEG TYPE STRING,
LC_PERSON TYPE STRING,
LC_DATE TYPE STRING,
RELEASED TYPE STRING,
OBJ_TEXT TYPE STRING,
SEG_TEXT TYPE STRING,
DEF_TEXT TYPE STRING,
POS TYPE STRING,
IDOC_FIELD TYPE STRING,
INPUTLENG TYPE STRING,
REFFIELD TYPE STRING,
LIS_DTEL TYPE STRING,
DATATYPE TYPE STRING,
LENG TYPE STRING,
DTEL_TEXT TYPE STRING,
EXTTYPE TYPE STRING,
FENTRY_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DMCSE_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_DMCSE_STR-MANDT sy-vline 
WA_DMCSE_STR-ZEITP sy-vline 
WA_DMCSE_STR-CSTRU sy-vline 
WA_DMCSE_STR-SPRAS sy-vline 
WA_DMCSE_STR-ZPTXT sy-vline 
WA_DMCSE_STR-MCATX sy-vline 
WA_DMCSE_STR-KAPPL sy-vline 
WA_DMCSE_STR-STAFO sy-vline 
WA_DMCSE_STR-SFTXT sy-vline 
WA_DMCSE_STR-FGROUP sy-vline 
WA_DMCSE_STR-KEYFELD sy-vline 
WA_DMCSE_STR-FBSNAME sy-vline 
WA_DMCSE_STR-FIDOC sy-vline 
WA_DMCSE_STR-FKOME sy-vline 
WA_DMCSE_STR-FKOMM sy-vline 
WA_DMCSE_STR-PONOC sy-vline 
WA_DMCSE_STR-PORFC sy-vline 
WA_DMCSE_STR-POCPI sy-vline 
WA_DMCSE_STR-POFIL sy-vline 
WA_DMCSE_STR-CSTRU1 sy-vline 
WA_DMCSE_STR-FIELD1 sy-vline 
WA_DMCSE_STR-KEYFD1 sy-vline 
WA_DMCSE_STR-LOGFD1 sy-vline 
WA_DMCSE_STR-CSTRU2 sy-vline 
WA_DMCSE_STR-FIELD2 sy-vline 
WA_DMCSE_STR-KEYFD2 sy-vline 
WA_DMCSE_STR-LOGFD2 sy-vline 
WA_DMCSE_STR-FDTXT1 sy-vline 
WA_DMCSE_STR-FDTXT2 sy-vline 
WA_DMCSE_STR-LOGSYS sy-vline 
WA_DMCSE_STR-LOGTXT sy-vline 
WA_DMCSE_STR-PARNUM sy-vline 
WA_DMCSE_STR-PORT sy-vline 
WA_DMCSE_STR-PORTTXT sy-vline 
WA_DMCSE_STR-CIMTYP sy-vline 
WA_DMCSE_STR-OBJECT sy-vline 
WA_DMCSE_STR-SEGTYP sy-vline 
WA_DMCSE_STR-MINNOSEG sy-vline 
WA_DMCSE_STR-MAXNOSEG sy-vline 
WA_DMCSE_STR-LC_PERSON sy-vline 
WA_DMCSE_STR-LC_DATE sy-vline 
WA_DMCSE_STR-RELEASED sy-vline 
WA_DMCSE_STR-OBJ_TEXT sy-vline 
WA_DMCSE_STR-SEG_TEXT sy-vline 
WA_DMCSE_STR-DEF_TEXT sy-vline 
WA_DMCSE_STR-POS sy-vline 
WA_DMCSE_STR-IDOC_FIELD sy-vline 
WA_DMCSE_STR-INPUTLENG sy-vline 
WA_DMCSE_STR-REFFIELD sy-vline 
WA_DMCSE_STR-LIS_DTEL sy-vline 
WA_DMCSE_STR-DATATYPE sy-vline 
WA_DMCSE_STR-LENG sy-vline 
WA_DMCSE_STR-DTEL_TEXT sy-vline 
WA_DMCSE_STR-EXTTYPE sy-vline 
WA_DMCSE_STR-FENTRY_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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