ABAP Select data from SAP table PRHS_CPF_SCALE_HEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PRHS_CPF_SCALE_HEADER
*  INTO TABLE @DATA(IT_PRHS_CPF_SCALE_HEADER2).
*--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_PRHS_CPF_SCALE_HEADER INDEX 1 INTO DATA(WA_PRHS_CPF_SCALE_HEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PRHS_CPF_SCALE_HEADER>-SCALE_EVAL_ROUTINE = 1.
<PRHS_CPF_SCALE_HEADER>-SCALE_EVAL_ROUTINE_DESCR = 1.
<PRHS_CPF_SCALE_HEADER>-SCALE_TYPE = 1.
<PRHS_CPF_SCALE_HEADER>-SCALE_TYPE_DESCR = 1.
<PRHS_CPF_SCALE_HEADER>-SCALE_BASE_PARAMETER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PRHS_CPF_SCALE_HEADER-SCALE_BASE_PARAM_KEY, sy-vline,
  WA_PRHS_CPF_SCALE_HEADER-SCALE_BASE_PARAM_DESC_LONG_SEL, sy-vline,
  WA_PRHS_CPF_SCALE_HEADER-SCALE_BASE_PARA_DESC_SHORT, sy-vline,
  WA_PRHS_CPF_SCALE_HEADER-SCALE_BASE_PARA_DESC_LONG, sy-vline,
  WA_PRHS_CPF_SCALE_HEADER-SCALE_BASE_SUBPARAMETER, sy-vline,
  WA_PRHS_CPF_SCALE_HEADER-SCALE_BASE_SUBPARA_DESCR_SHORT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PRHS_CPF_SCALE_HEADER 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_PRHS_CPF_SCALE_HEADER 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_PRHS_CPF_SCALE_HEADER INTO WA_PRHS_CPF_SCALE_HEADER.


*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 SCALE_LEVEL_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PRHS_CPF_SCALE_HEADER-SCALE_LEVEL_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRHS_CPF_SCALE_HEADER-SCALE_LEVEL_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field SCALE_LEVEL_VAL_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PRHS_CPF_SCALE_HEADER-SCALE_LEVEL_VAL_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRHS_CPF_SCALE_HEADER-SCALE_LEVEL_VAL_UNIT.
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_PRHS_CPF_SCALE_HEADER_STR, 
SCALE_EVAL_ROUTINE TYPE STRING,
SCALE_EVAL_ROUTINE_DESCR TYPE STRING,
SCALE_TYPE TYPE STRING,
SCALE_TYPE_DESCR TYPE STRING,
SCALE_BASE_PARAMETER TYPE STRING,
SCALE_BASE_PARAM_KEY TYPE STRING,
SCALE_BASE_PARAM_DESC_LONG_SEL TYPE STRING,
SCALE_BASE_PARA_DESC_SHORT TYPE STRING,
SCALE_BASE_PARA_DESC_LONG TYPE STRING,
SCALE_BASE_SUBPARAMETER TYPE STRING,
SCALE_BASE_SUBPARA_DESCR_SHORT TYPE STRING,
SCALE_BASE_SUBPARA_DESCR_LONG TYPE STRING,
SCALE_BASE_PARAM_DATA_TYPE TYPE STRING,
SCALE_BASE_PARAM_DATA_CATEGORY TYPE STRING,
RESULT_PARAMETER TYPE STRING,
RESULT_SUBPARAMETER TYPE STRING,
RESULT_PARAMETER_DESCR_SHORT TYPE STRING,
RESULT_PARAMETER_DESCR_LONG TYPE STRING,
RESULT_PARAM_DATA_TYPE TYPE STRING,
RESULT_PARAM_DATA_CATEGORY TYPE STRING,
START_ASC_SCALE TYPE STRING,
START_DESC_SCALE TYPE STRING,
SCALE_LEVEL_CURRENCY TYPE STRING,
SCALE_LEVEL_PRICE_UNIT TYPE STRING,
SCALE_LEVEL_UNIT TYPE STRING,
SCALE_LEVEL_VAL_CURRENCY TYPE STRING,
SCALE_LEVEL_VAL_PRICE_UNIT TYPE STRING,
SCALE_LEVEL_VAL_UNIT TYPE STRING,
SCALE_BASE_VALUE TYPE STRING,
SCALE_DISABLED TYPE STRING,
SCALE_RESULT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PRHS_CPF_SCALE_HEADER_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_PRHS_CPF_SCALE_HEADER_STR-SCALE_EVAL_ROUTINE sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_EVAL_ROUTINE_DESCR sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_TYPE sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_TYPE_DESCR sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_BASE_PARAMETER sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_BASE_PARAM_KEY sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_BASE_PARAM_DESC_LONG_SEL sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_BASE_PARA_DESC_SHORT sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_BASE_PARA_DESC_LONG sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_BASE_SUBPARAMETER sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_BASE_SUBPARA_DESCR_SHORT sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_BASE_SUBPARA_DESCR_LONG sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_BASE_PARAM_DATA_TYPE sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_BASE_PARAM_DATA_CATEGORY sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-RESULT_PARAMETER sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-RESULT_SUBPARAMETER sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-RESULT_PARAMETER_DESCR_SHORT sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-RESULT_PARAMETER_DESCR_LONG sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-RESULT_PARAM_DATA_TYPE sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-RESULT_PARAM_DATA_CATEGORY sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-START_ASC_SCALE sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-START_DESC_SCALE sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_LEVEL_CURRENCY sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_LEVEL_PRICE_UNIT sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_LEVEL_UNIT sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_LEVEL_VAL_CURRENCY sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_LEVEL_VAL_PRICE_UNIT sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_LEVEL_VAL_UNIT sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_BASE_VALUE sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_DISABLED sy-vline 
WA_PRHS_CPF_SCALE_HEADER_STR-SCALE_RESULT sy-vline      INTO ld_text SEPARATED BY SPACE.

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