ABAP Select data from SAP table CEPSUSAGECHG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CEPSUSAGECHG
*  INTO TABLE @DATA(IT_CEPSUSAGECHG2).
*--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_CEPSUSAGECHG INDEX 1 INTO DATA(WA_CEPSUSAGECHG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CEPSUSAGECHG>-MANDT = 1.
<CEPSUSAGECHG>-UTILITIESPRODUCT = 1.
<CEPSUSAGECHG>-UTILSPRODUCTREGION = 1.
<CEPSUSAGECHG>-UTILSPRICEID = 1.
<CEPSUSAGECHG>-UTILSPRICENAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CEPSUSAGECHG-UTILSPRICEFROMBLOCK, sy-vline,
  WA_CEPSUSAGECHG-UTILSPRICETOBLOCK, sy-vline,
  WA_CEPSUSAGECHG-UTILSMEASUREMENTUNIT, sy-vline,
  WA_CEPSUSAGECHG-UTILSPRICEFREQUENCYUNIT, sy-vline,
  WA_CEPSUSAGECHG-UTILSPRICEFREQUENCYVALUE, sy-vline,
  WA_CEPSUSAGECHG-UTILSPRICEAMOUNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CEPSUSAGECHG 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_CEPSUSAGECHG 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_CEPSUSAGECHG INTO WA_CEPSUSAGECHG.


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

*Conversion exit CUNIT, internal->external for field UTILSMEASUREMENTUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CEPSUSAGECHG-UTILSMEASUREMENTUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CEPSUSAGECHG-UTILSMEASUREMENTUNIT.
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_CEPSUSAGECHG_STR, 
MANDT TYPE STRING,
UTILITIESPRODUCT TYPE STRING,
UTILSPRODUCTREGION TYPE STRING,
UTILSPRICEID TYPE STRING,
UTILSPRICENAME TYPE STRING,
UTILSPRICEFROMBLOCK TYPE STRING,
UTILSPRICETOBLOCK TYPE STRING,
UTILSMEASUREMENTUNIT TYPE STRING,
UTILSPRICEFREQUENCYUNIT TYPE STRING,
UTILSPRICEFREQUENCYVALUE TYPE STRING,
UTILSPRICEAMOUNT TYPE STRING,
UTILSPRICECURRENCY TYPE STRING,
UTILSPRICETIERTYPE TYPE STRING,
UTILSSEMANTICSNAME1 TYPE STRING,
UTILSSEMANTICSNAME2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CEPSUSAGECHG_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_CEPSUSAGECHG_STR-MANDT sy-vline 
WA_CEPSUSAGECHG_STR-UTILITIESPRODUCT sy-vline 
WA_CEPSUSAGECHG_STR-UTILSPRODUCTREGION sy-vline 
WA_CEPSUSAGECHG_STR-UTILSPRICEID sy-vline 
WA_CEPSUSAGECHG_STR-UTILSPRICENAME sy-vline 
WA_CEPSUSAGECHG_STR-UTILSPRICEFROMBLOCK sy-vline 
WA_CEPSUSAGECHG_STR-UTILSPRICETOBLOCK sy-vline 
WA_CEPSUSAGECHG_STR-UTILSMEASUREMENTUNIT sy-vline 
WA_CEPSUSAGECHG_STR-UTILSPRICEFREQUENCYUNIT sy-vline 
WA_CEPSUSAGECHG_STR-UTILSPRICEFREQUENCYVALUE sy-vline 
WA_CEPSUSAGECHG_STR-UTILSPRICEAMOUNT sy-vline 
WA_CEPSUSAGECHG_STR-UTILSPRICECURRENCY sy-vline 
WA_CEPSUSAGECHG_STR-UTILSPRICETIERTYPE sy-vline 
WA_CEPSUSAGECHG_STR-UTILSSEMANTICSNAME1 sy-vline 
WA_CEPSUSAGECHG_STR-UTILSSEMANTICSNAME2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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