ABAP Select data from SAP table MCUMSCHLAG into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MCUMSCHLAG 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 MCUMSCHLAG. 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 MCUMSCHLAG 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_MCUMSCHLAG TYPE STANDARD TABLE OF MCUMSCHLAG,
      WA_MCUMSCHLAG TYPE MCUMSCHLAG,
      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: <MCUMSCHLAG> TYPE MCUMSCHLAG.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCUMSCHLAG
*  INTO TABLE @DATA(IT_MCUMSCHLAG2).
*--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_MCUMSCHLAG INDEX 1 INTO DATA(WA_MCUMSCHLAG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCUMSCHLAG>-UHGSBEST = 1.
<MCUMSCHLAG>-UHBWBEST = 1.
<MCUMSCHLAG>-UHKOBEST = 1.
<MCUMSCHLAG>-DUHBWBEST = 1.
<MCUMSCHLAG>-DUHKOBEST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCUMSCHLAG-DUHGSBEST, sy-vline,
  WA_MCUMSCHLAG-UHWBWBEST, sy-vline,
  WA_MCUMSCHLAG-UHWGSBEST, sy-vline,
  WA_MCUMSCHLAG-DUHWGSBEST, sy-vline,
  WA_MCUMSCHLAG-DUHWBWBEST, sy-vline,
  WA_MCUMSCHLAG-JUHWGSBEST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCUMSCHLAG 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_MCUMSCHLAG 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_MCUMSCHLAG INTO WA_MCUMSCHLAG.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_MCUMSCHLAG_STR, 
UHGSBEST TYPE STRING,
UHBWBEST TYPE STRING,
UHKOBEST TYPE STRING,
DUHBWBEST TYPE STRING,
DUHKOBEST TYPE STRING,
DUHGSBEST TYPE STRING,
UHWBWBEST TYPE STRING,
UHWGSBEST TYPE STRING,
DUHWGSBEST TYPE STRING,
DUHWBWBEST TYPE STRING,
JUHWGSBEST TYPE STRING,
JUHWBWBEST TYPE STRING,
JUHGSBEST TYPE STRING,
JUHKOBEST TYPE STRING,
JUHBWBEST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCUMSCHLAG_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_MCUMSCHLAG_STR-UHGSBEST sy-vline 
WA_MCUMSCHLAG_STR-UHBWBEST sy-vline 
WA_MCUMSCHLAG_STR-UHKOBEST sy-vline 
WA_MCUMSCHLAG_STR-DUHBWBEST sy-vline 
WA_MCUMSCHLAG_STR-DUHKOBEST sy-vline 
WA_MCUMSCHLAG_STR-DUHGSBEST sy-vline 
WA_MCUMSCHLAG_STR-UHWBWBEST sy-vline 
WA_MCUMSCHLAG_STR-UHWGSBEST sy-vline 
WA_MCUMSCHLAG_STR-DUHWGSBEST sy-vline 
WA_MCUMSCHLAG_STR-DUHWBWBEST sy-vline 
WA_MCUMSCHLAG_STR-JUHWGSBEST sy-vline 
WA_MCUMSCHLAG_STR-JUHWBWBEST sy-vline 
WA_MCUMSCHLAG_STR-JUHGSBEST sy-vline 
WA_MCUMSCHLAG_STR-JUHKOBEST sy-vline 
WA_MCUMSCHLAG_STR-JUHBWBEST sy-vline      INTO ld_text SEPARATED BY SPACE.

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