ABAP Select data from SAP table CPET_PERIODDET_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_PERIODDET_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_PERIODDET_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_PERIODDET_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_PERIODDET_COM TYPE STANDARD TABLE OF CPET_PERIODDET_COM,
      WA_CPET_PERIODDET_COM TYPE CPET_PERIODDET_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_PERIODDET_COM> TYPE CPET_PERIODDET_COM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CPET_PERIODDET_COM
*  INTO TABLE @DATA(IT_CPET_PERIODDET_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_PERIODDET_COM INDEX 1 INTO DATA(WA_CPET_PERIODDET_COM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CPET_PERIODDET_COM>-DOCITEM_GUID = 1.
<CPET_PERIODDET_COM>-COND_TYPE = 1.
<CPET_PERIODDET_COM>-TERMNO = 1.
<CPET_PERIODDET_COM>-PERIODDTIN_GUID = 1.
<CPET_PERIODDET_COM>-PERIODDETRULE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CPET_PERIODDET_COM-RULETEXT, sy-vline,
  WA_CPET_PERIODDET_COM-VALIDFROM, sy-vline,
  WA_CPET_PERIODDET_COM-PERIODDETROUT, sy-vline,
  WA_CPET_PERIODDET_COM-SOURCEROUT, sy-vline,
  WA_CPET_PERIODDET_COM-REFDATEROUT, sy-vline,
  WA_CPET_PERIODDET_COM-DATEOFFSETROUT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CPET_PERIODDET_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_PERIODDET_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_PERIODDET_COM INTO WA_CPET_PERIODDET_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 PERIODDETRULE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CPET_PERIODDET_COM-PERIODDETRULE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CPET_PERIODDET_COM-PERIODDETRULE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field VALIDFROM
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_CPET_PERIODDET_COM-VALIDFROM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CPET_PERIODDET_COM-VALIDFROM.
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_PERIODDET_COM_STR, 
DOCITEM_GUID TYPE STRING,
COND_TYPE TYPE STRING,
TERMNO TYPE STRING,
PERIODDTIN_GUID TYPE STRING,
PERIODDETRULE TYPE STRING,
RULETEXT TYPE STRING,
VALIDFROM TYPE STRING,
PERIODDETROUT TYPE STRING,
SOURCEROUT TYPE STRING,
REFDATEROUT TYPE STRING,
DATEOFFSETROUT TYPE STRING,
OFFSETUNITS TYPE STRING,
TIMEUOMROUT TYPE STRING,
TIMEUNITSBEF TYPE STRING,
TIMEUNITSAFT TYPE STRING,
EXCL_BASEDATE TYPE STRING,
DATEFROM TYPE STRING,
TIMEFROM TYPE STRING,
DATETO TYPE STRING,
TIMETO TYPE STRING,
DATELISTROUT TYPE STRING,
PERDETCALID TYPE STRING,
MISSENTRYROUT TYPE STRING,
CLOSEDDAYSROUT TYPE STRING,
MAXWEIGHTING TYPE STRING,
PERIODDETTEXT TYPE STRING,
SOURCETEXT TYPE STRING,
REFDATETEXT TYPE STRING,
DATEOFFSETTEXT TYPE STRING,
READUNTILTEXT TYPE STRING,
DATELISTTEXT TYPE STRING,
CALIDTEXT TYPE STRING,
MISSENTRYTEXT TYPE STRING,
CLOSEDDAYSTEXT TYPE STRING,
TIMEUOMTEXT TYPE STRING,
FLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CPET_PERIODDET_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_PERIODDET_COM_STR-DOCITEM_GUID sy-vline 
WA_CPET_PERIODDET_COM_STR-COND_TYPE sy-vline 
WA_CPET_PERIODDET_COM_STR-TERMNO sy-vline 
WA_CPET_PERIODDET_COM_STR-PERIODDTIN_GUID sy-vline 
WA_CPET_PERIODDET_COM_STR-PERIODDETRULE sy-vline 
WA_CPET_PERIODDET_COM_STR-RULETEXT sy-vline 
WA_CPET_PERIODDET_COM_STR-VALIDFROM sy-vline 
WA_CPET_PERIODDET_COM_STR-PERIODDETROUT sy-vline 
WA_CPET_PERIODDET_COM_STR-SOURCEROUT sy-vline 
WA_CPET_PERIODDET_COM_STR-REFDATEROUT sy-vline 
WA_CPET_PERIODDET_COM_STR-DATEOFFSETROUT sy-vline 
WA_CPET_PERIODDET_COM_STR-OFFSETUNITS sy-vline 
WA_CPET_PERIODDET_COM_STR-TIMEUOMROUT sy-vline 
WA_CPET_PERIODDET_COM_STR-TIMEUNITSBEF sy-vline 
WA_CPET_PERIODDET_COM_STR-TIMEUNITSAFT sy-vline 
WA_CPET_PERIODDET_COM_STR-EXCL_BASEDATE sy-vline 
WA_CPET_PERIODDET_COM_STR-DATEFROM sy-vline 
WA_CPET_PERIODDET_COM_STR-TIMEFROM sy-vline 
WA_CPET_PERIODDET_COM_STR-DATETO sy-vline 
WA_CPET_PERIODDET_COM_STR-TIMETO sy-vline 
WA_CPET_PERIODDET_COM_STR-DATELISTROUT sy-vline 
WA_CPET_PERIODDET_COM_STR-PERDETCALID sy-vline 
WA_CPET_PERIODDET_COM_STR-MISSENTRYROUT sy-vline 
WA_CPET_PERIODDET_COM_STR-CLOSEDDAYSROUT sy-vline 
WA_CPET_PERIODDET_COM_STR-MAXWEIGHTING sy-vline 
WA_CPET_PERIODDET_COM_STR-PERIODDETTEXT sy-vline 
WA_CPET_PERIODDET_COM_STR-SOURCETEXT sy-vline 
WA_CPET_PERIODDET_COM_STR-REFDATETEXT sy-vline 
WA_CPET_PERIODDET_COM_STR-DATEOFFSETTEXT sy-vline 
WA_CPET_PERIODDET_COM_STR-READUNTILTEXT sy-vline 
WA_CPET_PERIODDET_COM_STR-DATELISTTEXT sy-vline 
WA_CPET_PERIODDET_COM_STR-CALIDTEXT sy-vline 
WA_CPET_PERIODDET_COM_STR-MISSENTRYTEXT sy-vline 
WA_CPET_PERIODDET_COM_STR-CLOSEDDAYSTEXT sy-vline 
WA_CPET_PERIODDET_COM_STR-TIMEUOMTEXT sy-vline 
WA_CPET_PERIODDET_COM_STR-FLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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