ABAP Select data from SAP table CRMT_BUS_CLASS_BW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRMT_BUS_CLASS_BW
*  INTO TABLE @DATA(IT_CRMT_BUS_CLASS_BW2).
*--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_CRMT_BUS_CLASS_BW INDEX 1 INTO DATA(WA_CRMT_BUS_CLASS_BW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRMT_BUS_CLASS_BW>-CLIENT = 1.
<CRMT_BUS_CLASS_BW>-PARTNER_ID = 1.
<CRMT_BUS_CLASS_BW>-GUID = 1.
<CRMT_BUS_CLASS_BW>-CLASSCAT = 1.
<CRMT_BUS_CLASS_BW>-CRIT1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRMT_BUS_CLASS_BW-CRIT2, sy-vline,
  WA_CRMT_BUS_CLASS_BW-CRIT3, sy-vline,
  WA_CRMT_BUS_CLASS_BW-CRIT4, sy-vline,
  WA_CRMT_BUS_CLASS_BW-CRIT5, sy-vline,
  WA_CRMT_BUS_CLASS_BW-ATTRID, sy-vline,
  WA_CRMT_BUS_CLASS_BW-VALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRMT_BUS_CLASS_BW 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_CRMT_BUS_CLASS_BW 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_CRMT_BUS_CLASS_BW INTO WA_CRMT_BUS_CLASS_BW.


*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 PARTNER_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CRMT_BUS_CLASS_BW-PARTNER_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMT_BUS_CLASS_BW-PARTNER_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HOME_SYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CRMT_BUS_CLASS_BW-HOME_SYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMT_BUS_CLASS_BW-HOME_SYSTEM.
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_CRMT_BUS_CLASS_BW_STR, 
CLIENT TYPE STRING,
PARTNER_ID TYPE STRING,
GUID TYPE STRING,
CLASSCAT TYPE STRING,
CRIT1 TYPE STRING,
CRIT2 TYPE STRING,
CRIT3 TYPE STRING,
CRIT4 TYPE STRING,
CRIT5 TYPE STRING,
ATTRID TYPE STRING,
VALUE TYPE STRING,
VALID_TO TYPE STRING,
VALID_FROM TYPE STRING,
HOME_SYSTEM TYPE STRING,
CREATED_BY TYPE STRING,
CHANGED_BY TYPE STRING,
CREATED_ON TYPE STRING,
CHANGED_ON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRMT_BUS_CLASS_BW_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_CRMT_BUS_CLASS_BW_STR-CLIENT sy-vline 
WA_CRMT_BUS_CLASS_BW_STR-PARTNER_ID sy-vline 
WA_CRMT_BUS_CLASS_BW_STR-GUID sy-vline 
WA_CRMT_BUS_CLASS_BW_STR-CLASSCAT sy-vline 
WA_CRMT_BUS_CLASS_BW_STR-CRIT1 sy-vline 
WA_CRMT_BUS_CLASS_BW_STR-CRIT2 sy-vline 
WA_CRMT_BUS_CLASS_BW_STR-CRIT3 sy-vline 
WA_CRMT_BUS_CLASS_BW_STR-CRIT4 sy-vline 
WA_CRMT_BUS_CLASS_BW_STR-CRIT5 sy-vline 
WA_CRMT_BUS_CLASS_BW_STR-ATTRID sy-vline 
WA_CRMT_BUS_CLASS_BW_STR-VALUE sy-vline 
WA_CRMT_BUS_CLASS_BW_STR-VALID_TO sy-vline 
WA_CRMT_BUS_CLASS_BW_STR-VALID_FROM sy-vline 
WA_CRMT_BUS_CLASS_BW_STR-HOME_SYSTEM sy-vline 
WA_CRMT_BUS_CLASS_BW_STR-CREATED_BY sy-vline 
WA_CRMT_BUS_CLASS_BW_STR-CHANGED_BY sy-vline 
WA_CRMT_BUS_CLASS_BW_STR-CREATED_ON sy-vline 
WA_CRMT_BUS_CLASS_BW_STR-CHANGED_ON sy-vline      INTO ld_text SEPARATED BY SPACE.

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