ABAP Select data from SAP table MRM_COBL_AMT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MRM_COBL_AMT
*  INTO TABLE @DATA(IT_MRM_COBL_AMT2).
*--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_MRM_COBL_AMT INDEX 1 INTO DATA(WA_MRM_COBL_AMT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MRM_COBL_AMT>-BSMNG = 1.
<MRM_COBL_AMT>-NETWR = 1.
<MRM_COBL_AMT>-WEMNG = 1.
<MRM_COBL_AMT>-BPWEM = 1.
<MRM_COBL_AMT>-WEWWR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MRM_COBL_AMT-REMNG, sy-vline,
  WA_MRM_COBL_AMT-BPREM, sy-vline,
  WA_MRM_COBL_AMT-REWWR, sy-vline,
  WA_MRM_COBL_AMT-REFWR, sy-vline,
  WA_MRM_COBL_AMT-WENWR, sy-vline,
  WA_MRM_COBL_AMT-REWRB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MRM_COBL_AMT 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_MRM_COBL_AMT 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_MRM_COBL_AMT INTO WA_MRM_COBL_AMT.


*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_MRM_COBL_AMT_STR, 
BSMNG TYPE STRING,
NETWR TYPE STRING,
WEMNG TYPE STRING,
BPWEM TYPE STRING,
WEWWR TYPE STRING,
REMNG TYPE STRING,
BPREM TYPE STRING,
REWWR TYPE STRING,
REFWR TYPE STRING,
WENWR TYPE STRING,
REWRB TYPE STRING,
WEWRB TYPE STRING,
INV_ITM_ORIGIN TYPE STRING,
WEMNG_F TYPE STRING,
BPWEM_F TYPE STRING,
REMNG_F TYPE STRING,
BPREM_F TYPE STRING,
BSMNG_F TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MRM_COBL_AMT_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_MRM_COBL_AMT_STR-BSMNG sy-vline 
WA_MRM_COBL_AMT_STR-NETWR sy-vline 
WA_MRM_COBL_AMT_STR-WEMNG sy-vline 
WA_MRM_COBL_AMT_STR-BPWEM sy-vline 
WA_MRM_COBL_AMT_STR-WEWWR sy-vline 
WA_MRM_COBL_AMT_STR-REMNG sy-vline 
WA_MRM_COBL_AMT_STR-BPREM sy-vline 
WA_MRM_COBL_AMT_STR-REWWR sy-vline 
WA_MRM_COBL_AMT_STR-REFWR sy-vline 
WA_MRM_COBL_AMT_STR-WENWR sy-vline 
WA_MRM_COBL_AMT_STR-REWRB sy-vline 
WA_MRM_COBL_AMT_STR-WEWRB sy-vline 
WA_MRM_COBL_AMT_STR-INV_ITM_ORIGIN sy-vline 
WA_MRM_COBL_AMT_STR-WEMNG_F sy-vline 
WA_MRM_COBL_AMT_STR-BPWEM_F sy-vline 
WA_MRM_COBL_AMT_STR-REMNG_F sy-vline 
WA_MRM_COBL_AMT_STR-BPREM_F sy-vline 
WA_MRM_COBL_AMT_STR-BSMNG_F sy-vline      INTO ld_text SEPARATED BY SPACE.

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