ABAP Select data from SAP table CM61A into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CM61A 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 CM61A. 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 CM61A 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_CM61A TYPE STANDARD TABLE OF CM61A,
      WA_CM61A TYPE CM61A,
      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: <CM61A> TYPE CM61A.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CM61A.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CM61A
  INTO TABLE IT_CM61A.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CM61A
*  INTO TABLE @DATA(IT_CM61A2).
*--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_CM61A INDEX 1 INTO DATA(WA_CM61A2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CM61A ASSIGNING <CM61A>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CM61A>-ANWDG = 1.
<CM61A>-TEILP = 1.
<CM61A>-AZERG = 1.
<CM61A>-VPERG = 1.
<CM61A>-EGSBS = 1.

ENDLOOP.

LOOP AT IT_CM61A INTO WA_CM61A.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CM61A-MEMO_TP, sy-vline,
  WA_CM61A-MEMO_GP, sy-vline,
  WA_CM61A-GSBTR, sy-vline,
  WA_CM61A-BSFAK, sy-vline,
  WA_CM61A-BSDIF, sy-vline,
  WA_CM61A-TRTYP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CM61A 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_CM61A 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_CM61A INTO WA_CM61A.


*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 ALPHA, internal->external for field MEMO_GP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CM61A-MEMO_GP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CM61A-MEMO_GP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field LAGME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CM61A-LAGME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CM61A-LAGME.
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_CM61A_STR, 
ANWDG TYPE STRING,
TEILP TYPE STRING,
AZERG TYPE STRING,
VPERG TYPE STRING,
EGSBS TYPE STRING,
MEMO_TP TYPE STRING,
MEMO_GP TYPE STRING,
GSBTR TYPE STRING,
BSFAK TYPE STRING,
BSDIF TYPE STRING,
TRTYP TYPE STRING,
ERRKZ TYPE STRING,
LAGME TYPE STRING,
VFMNG TYPE STRING,
GSMNG TYPE STRING,
FABKL TYPE STRING,
WERKS TYPE STRING,
PEDTR TYPE STRING,
INITX TYPE STRING,
LOCOX TYPE STRING,
TBSTR TYPE STRING,
TBSMG TYPE STRING,
MULTI TYPE STRING,
KZAKP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CM61A_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_CM61A_STR-ANWDG sy-vline 
WA_CM61A_STR-TEILP sy-vline 
WA_CM61A_STR-AZERG sy-vline 
WA_CM61A_STR-VPERG sy-vline 
WA_CM61A_STR-EGSBS sy-vline 
WA_CM61A_STR-MEMO_TP sy-vline 
WA_CM61A_STR-MEMO_GP sy-vline 
WA_CM61A_STR-GSBTR sy-vline 
WA_CM61A_STR-BSFAK sy-vline 
WA_CM61A_STR-BSDIF sy-vline 
WA_CM61A_STR-TRTYP sy-vline 
WA_CM61A_STR-ERRKZ sy-vline 
WA_CM61A_STR-LAGME sy-vline 
WA_CM61A_STR-VFMNG sy-vline 
WA_CM61A_STR-GSMNG sy-vline 
WA_CM61A_STR-FABKL sy-vline 
WA_CM61A_STR-WERKS sy-vline 
WA_CM61A_STR-PEDTR sy-vline 
WA_CM61A_STR-INITX sy-vline 
WA_CM61A_STR-LOCOX sy-vline 
WA_CM61A_STR-TBSTR sy-vline 
WA_CM61A_STR-TBSMG sy-vline 
WA_CM61A_STR-MULTI sy-vline 
WA_CM61A_STR-KZAKP sy-vline      INTO ld_text SEPARATED BY SPACE.

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