ABAP Select data from SAP table CPET_DEFCALCRULE_COM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CPET_DEFCALCRULE_COM
*  INTO TABLE @DATA(IT_CPET_DEFCALCRULE_COM2).
*--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_CPET_DEFCALCRULE_COM INDEX 1 INTO DATA(WA_CPET_DEFCALCRULE_COM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CPET_DEFCALCRULE_COM>-DOC_GUID = 1.
<CPET_DEFCALCRULE_COM>-COND_TYPE = 1.
<CPET_DEFCALCRULE_COM>-TERMNO = 1.
<CPET_DEFCALCRULE_COM>-CALCRULE = 1.
<CPET_DEFCALCRULE_COM>-RULETEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CPET_DEFCALCRULE_COM-VALIDFROM, sy-vline,
  WA_CPET_DEFCALCRULE_COM-CALCROUT, sy-vline,
  WA_CPET_DEFCALCRULE_COM-CALCMIN, sy-vline,
  WA_CPET_DEFCALCRULE_COM-CALCMAX, sy-vline,
  WA_CPET_DEFCALCRULE_COM-CALCMMCURR, sy-vline,
  WA_CPET_DEFCALCRULE_COM-CALCMMPRUN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CPET_DEFCALCRULE_COM 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_CPET_DEFCALCRULE_COM 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_CPET_DEFCALCRULE_COM INTO WA_CPET_DEFCALCRULE_COM.


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

*Conversion exit TSTPS, internal->external for field VALIDFROM
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_CPET_DEFCALCRULE_COM-VALIDFROM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CPET_DEFCALCRULE_COM-VALIDFROM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field CALCMMUOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CPET_DEFCALCRULE_COM-CALCMMUOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CPET_DEFCALCRULE_COM-CALCMMUOM.
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_CPET_DEFCALCRULE_COM_STR, 
DOC_GUID TYPE STRING,
COND_TYPE TYPE STRING,
TERMNO TYPE STRING,
CALCRULE TYPE STRING,
RULETEXT TYPE STRING,
VALIDFROM TYPE STRING,
CALCROUT TYPE STRING,
CALCMIN TYPE STRING,
CALCMAX TYPE STRING,
CALCMMCURR TYPE STRING,
CALCMMPRUN TYPE STRING,
CALCMMUOM TYPE STRING,
ROUTTEXT TYPE STRING,
FLAG TYPE STRING,
CALCMIN_DF34 TYPE STRING,
CALCMAX_DF34 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CPET_DEFCALCRULE_COM_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_CPET_DEFCALCRULE_COM_STR-DOC_GUID sy-vline 
WA_CPET_DEFCALCRULE_COM_STR-COND_TYPE sy-vline 
WA_CPET_DEFCALCRULE_COM_STR-TERMNO sy-vline 
WA_CPET_DEFCALCRULE_COM_STR-CALCRULE sy-vline 
WA_CPET_DEFCALCRULE_COM_STR-RULETEXT sy-vline 
WA_CPET_DEFCALCRULE_COM_STR-VALIDFROM sy-vline 
WA_CPET_DEFCALCRULE_COM_STR-CALCROUT sy-vline 
WA_CPET_DEFCALCRULE_COM_STR-CALCMIN sy-vline 
WA_CPET_DEFCALCRULE_COM_STR-CALCMAX sy-vline 
WA_CPET_DEFCALCRULE_COM_STR-CALCMMCURR sy-vline 
WA_CPET_DEFCALCRULE_COM_STR-CALCMMPRUN sy-vline 
WA_CPET_DEFCALCRULE_COM_STR-CALCMMUOM sy-vline 
WA_CPET_DEFCALCRULE_COM_STR-ROUTTEXT sy-vline 
WA_CPET_DEFCALCRULE_COM_STR-FLAG sy-vline 
WA_CPET_DEFCALCRULE_COM_STR-CALCMIN_DF34 sy-vline 
WA_CPET_DEFCALCRULE_COM_STR-CALCMAX_DF34 sy-vline      INTO ld_text SEPARATED BY SPACE.

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