ABAP Select data from SAP table CRUSAGE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRUSAGE
*  INTO TABLE @DATA(IT_CRUSAGE2).
*--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_CRUSAGE INDEX 1 INTO DATA(WA_CRUSAGE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRUSAGE>-MANDT = 1.
<CRUSAGE>-ARBID = 1.
<CRUSAGE>-ARBPL = 1.
<CRUSAGE>-WERKS = 1.
<CRUSAGE>-KAPID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRUSAGE-DATUV, sy-vline,
  WA_CRUSAGE-DATUB, sy-vline,
  WA_CRUSAGE-ANGEB, sy-vline,
  WA_CRUSAGE-KEINH, sy-vline,
  WA_CRUSAGE-EINZT, sy-vline,
  WA_CRUSAGE-BEGZT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRUSAGE 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_CRUSAGE 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_CRUSAGE INTO WA_CRUSAGE.


*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 CUNIT, internal->external for field KEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CRUSAGE-KEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRUSAGE-KEINH.
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_CRUSAGE_STR, 
MANDT TYPE STRING,
ARBID TYPE STRING,
ARBPL TYPE STRING,
WERKS TYPE STRING,
KAPID TYPE STRING,
DATUV TYPE STRING,
DATUB TYPE STRING,
ANGEB TYPE STRING,
KEINH TYPE STRING,
EINZT TYPE STRING,
BEGZT TYPE STRING,
ENDZT TYPE STRING,
KALID TYPE STRING,
KAPAR TYPE STRING,
NGRAD TYPE STRING,
PAUSE TYPE STRING,
GRPRH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRUSAGE_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_CRUSAGE_STR-MANDT sy-vline 
WA_CRUSAGE_STR-ARBID sy-vline 
WA_CRUSAGE_STR-ARBPL sy-vline 
WA_CRUSAGE_STR-WERKS sy-vline 
WA_CRUSAGE_STR-KAPID sy-vline 
WA_CRUSAGE_STR-DATUV sy-vline 
WA_CRUSAGE_STR-DATUB sy-vline 
WA_CRUSAGE_STR-ANGEB sy-vline 
WA_CRUSAGE_STR-KEINH sy-vline 
WA_CRUSAGE_STR-EINZT sy-vline 
WA_CRUSAGE_STR-BEGZT sy-vline 
WA_CRUSAGE_STR-ENDZT sy-vline 
WA_CRUSAGE_STR-KALID sy-vline 
WA_CRUSAGE_STR-KAPAR sy-vline 
WA_CRUSAGE_STR-NGRAD sy-vline 
WA_CRUSAGE_STR-PAUSE sy-vline 
WA_CRUSAGE_STR-GRPRH sy-vline      INTO ld_text SEPARATED BY SPACE.

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