ABAP Select data from SAP table MCS05 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MCS05 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 MCS05. 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 MCS05 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_MCS05 TYPE STANDARD TABLE OF MCS05,
      WA_MCS05 TYPE MCS05,
      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: <MCS05> TYPE MCS05.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MCS05.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MCS05
  INTO TABLE IT_MCS05.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCS05
*  INTO TABLE @DATA(IT_MCS052).
*--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_MCS05 INDEX 1 INTO DATA(WA_MCS052).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MCS05 ASSIGNING <MCS05>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCS05>-TABNAME = 1.
<MCS05>-FIELDNAME = 1.
<MCS05>-OUTPUTLEN = 1.
<MCS05>-DATATYPE = 1.
<MCS05>-INTTYPE = 1.

ENDLOOP.

LOOP AT IT_MCS05 INTO WA_MCS05.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCS05-REFTABLE, sy-vline,
  WA_MCS05-REFFIELD, sy-vline,
  WA_MCS05-REFLEN, sy-vline,
  WA_MCS05-REPTEXT, sy-vline,
  WA_MCS05-SCRTEXT_S, sy-vline,
  WA_MCS05-SCRTEXT_M, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCS05 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_MCS05 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_MCS05 INTO WA_MCS05.


*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 DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_MCS05-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCS05-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_MCS05_STR, 
TABNAME TYPE STRING,
FIELDNAME TYPE STRING,
OUTPUTLEN TYPE STRING,
DATATYPE TYPE STRING,
INTTYPE TYPE STRING,
REFTABLE TYPE STRING,
REFFIELD TYPE STRING,
REFLEN TYPE STRING,
REPTEXT TYPE STRING,
SCRTEXT_S TYPE STRING,
SCRTEXT_M TYPE STRING,
SCRTEXT_L TYPE STRING,
DECIMALS TYPE STRING,
DOMNAME TYPE STRING,
ROLLNAME TYPE STRING,
UNIT TYPE STRING,
TOTAL_SUM TYPE STRING,
EXCEP_REL TYPE STRING,
SUM_MODE TYPE STRING,
NOT_VISIBLE TYPE STRING,
PERC_NOT_VALID TYPE STRING,
FACTOR TYPE STRING,
OLD_UNIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCS05_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_MCS05_STR-TABNAME sy-vline 
WA_MCS05_STR-FIELDNAME sy-vline 
WA_MCS05_STR-OUTPUTLEN sy-vline 
WA_MCS05_STR-DATATYPE sy-vline 
WA_MCS05_STR-INTTYPE sy-vline 
WA_MCS05_STR-REFTABLE sy-vline 
WA_MCS05_STR-REFFIELD sy-vline 
WA_MCS05_STR-REFLEN sy-vline 
WA_MCS05_STR-REPTEXT sy-vline 
WA_MCS05_STR-SCRTEXT_S sy-vline 
WA_MCS05_STR-SCRTEXT_M sy-vline 
WA_MCS05_STR-SCRTEXT_L sy-vline 
WA_MCS05_STR-DECIMALS sy-vline 
WA_MCS05_STR-DOMNAME sy-vline 
WA_MCS05_STR-ROLLNAME sy-vline 
WA_MCS05_STR-UNIT sy-vline 
WA_MCS05_STR-TOTAL_SUM sy-vline 
WA_MCS05_STR-EXCEP_REL sy-vline 
WA_MCS05_STR-SUM_MODE sy-vline 
WA_MCS05_STR-NOT_VISIBLE sy-vline 
WA_MCS05_STR-PERC_NOT_VALID sy-vline 
WA_MCS05_STR-FACTOR sy-vline 
WA_MCS05_STR-OLD_UNIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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