ABAP Select data from SAP table CM61L into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CM61L 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 CM61L. 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 CM61L 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_CM61L TYPE STANDARD TABLE OF CM61L,
      WA_CM61L TYPE CM61L,
      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: <CM61L> TYPE CM61L.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CM61L.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CM61L
  INTO TABLE IT_CM61L.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CM61L
*  INTO TABLE @DATA(IT_CM61L2).
*--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_CM61L INDEX 1 INTO DATA(WA_CM61L2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CM61L ASSIGNING <CM61L>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CM61L>-PLAUF = 1.
<CM61L>-MATNR = 1.
<CM61L>-MAKTX = 1.
<CM61L>-BERID = 1.
<CM61L>-BERTX = 1.

ENDLOOP.

LOOP AT IT_CM61L INTO WA_CM61L.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CM61L-BERTY, sy-vline,
  WA_CM61L-WERKS, sy-vline,
  WA_CM61L-WRKTX, sy-vline,
  WA_CM61L-PLSCN, sy-vline,
  WA_CM61L-PLSCT, sy-vline,
  WA_CM61L-OPFDT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CM61L 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_CM61L 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_CM61L INTO WA_CM61L.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CM61L-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CM61L-MATNR.
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_CM61L_STR, 
PLAUF TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
BERID TYPE STRING,
BERTX TYPE STRING,
BERTY TYPE STRING,
WERKS TYPE STRING,
WRKTX TYPE STRING,
PLSCN TYPE STRING,
PLSCT TYPE STRING,
OPFDT TYPE STRING,
MFXDT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CM61L_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_CM61L_STR-PLAUF sy-vline 
WA_CM61L_STR-MATNR sy-vline 
WA_CM61L_STR-MAKTX sy-vline 
WA_CM61L_STR-BERID sy-vline 
WA_CM61L_STR-BERTX sy-vline 
WA_CM61L_STR-BERTY sy-vline 
WA_CM61L_STR-WERKS sy-vline 
WA_CM61L_STR-WRKTX sy-vline 
WA_CM61L_STR-PLSCN sy-vline 
WA_CM61L_STR-PLSCT sy-vline 
WA_CM61L_STR-OPFDT sy-vline 
WA_CM61L_STR-MFXDT sy-vline      INTO ld_text SEPARATED BY SPACE.

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