ABAP Select data from SAP table CM61W into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CM61W 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 CM61W. 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 CM61W 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_CM61W TYPE STANDARD TABLE OF CM61W,
      WA_CM61W TYPE CM61W,
      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: <CM61W> TYPE CM61W.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CM61W.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CM61W
  INTO TABLE IT_CM61W.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CM61W
*  INTO TABLE @DATA(IT_CM61W2).
*--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_CM61W INDEX 1 INTO DATA(WA_CM61W2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CM61W ASSIGNING <CM61W>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CM61W>-PLWRK = 1.
<CM61W>-FABKL = 1.
<CM61W>-UMTHZ = 1.
<CM61W>-PLAHZ = 1.
<CM61W>-KASTL = 1.

ENDLOOP.

LOOP AT IT_CM61W INTO WA_CM61W.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CM61W-LIFKZ, sy-vline,
  WA_CM61W-GTERM, sy-vline,
  WA_CM61W-KZDRB, sy-vline,
  WA_CM61W-KZMAL, sy-vline,
  WA_CM61W-DISPD, sy-vline,
  WA_CM61W-REFWK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CM61W 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_CM61W 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_CM61W INTO WA_CM61W.


*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_CM61W_STR, 
PLWRK TYPE STRING,
FABKL TYPE STRING,
UMTHZ TYPE STRING,
PLAHZ TYPE STRING,
KASTL TYPE STRING,
LIFKZ TYPE STRING,
GTERM TYPE STRING,
KZDRB TYPE STRING,
KZMAL TYPE STRING,
DISPD TYPE STRING,
REFWK TYPE STRING,
SELFE TYPE STRING,
SELBE TYPE STRING,
SELQM TYPE STRING,
SELBA TYPE STRING,
SELPA TYPE STRING,
SELZR TYPE STRING,
SELPZ TYPE STRING,
SELLA TYPE STRING,
SELIW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CM61W_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_CM61W_STR-PLWRK sy-vline 
WA_CM61W_STR-FABKL sy-vline 
WA_CM61W_STR-UMTHZ sy-vline 
WA_CM61W_STR-PLAHZ sy-vline 
WA_CM61W_STR-KASTL sy-vline 
WA_CM61W_STR-LIFKZ sy-vline 
WA_CM61W_STR-GTERM sy-vline 
WA_CM61W_STR-KZDRB sy-vline 
WA_CM61W_STR-KZMAL sy-vline 
WA_CM61W_STR-DISPD sy-vline 
WA_CM61W_STR-REFWK sy-vline 
WA_CM61W_STR-SELFE sy-vline 
WA_CM61W_STR-SELBE sy-vline 
WA_CM61W_STR-SELQM sy-vline 
WA_CM61W_STR-SELBA sy-vline 
WA_CM61W_STR-SELPA sy-vline 
WA_CM61W_STR-SELZR sy-vline 
WA_CM61W_STR-SELPZ sy-vline 
WA_CM61W_STR-SELLA sy-vline 
WA_CM61W_STR-SELIW sy-vline      INTO ld_text SEPARATED BY SPACE.

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