ABAP Select data from SAP table PC2CN_DTR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC2CN_DTR 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 PC2CN_DTR. 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 PC2CN_DTR 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_PC2CN_DTR TYPE STANDARD TABLE OF PC2CN_DTR,
      WA_PC2CN_DTR TYPE PC2CN_DTR,
      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: <PC2CN_DTR> TYPE PC2CN_DTR.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC2CN_DTR.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC2CN_DTR
  INTO TABLE IT_PC2CN_DTR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC2CN_DTR
*  INTO TABLE @DATA(IT_PC2CN_DTR2).
*--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_PC2CN_DTR INDEX 1 INTO DATA(WA_PC2CN_DTR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC2CN_DTR ASSIGNING <PC2CN_DTR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC2CN_DTR>-DEGRP = 1.
<PC2CN_DTR>-DEGRPT = 1.
<PC2CN_DTR>-TRRUL = 1.
<PC2CN_DTR>-REAMT = 1.
<PC2CN_DTR>-RACUR = 1.

ENDLOOP.

LOOP AT IT_PC2CN_DTR INTO WA_PC2CN_DTR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC2CN_DTR-REPER, sy-vline,
  WA_PC2CN_DTR-MONHL, sy-vline,
  WA_PC2CN_DTR-MHCUR, sy-vline,
  WA_PC2CN_DTR-YERHL, sy-vline,
  WA_PC2CN_DTR-YHCUR, sy-vline,
  WA_PC2CN_DTR-INCHL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC2CN_DTR 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_PC2CN_DTR 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_PC2CN_DTR INTO WA_PC2CN_DTR.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PC2CN_DTR_STR, 
DEGRP TYPE STRING,
DEGRPT TYPE STRING,
TRRUL TYPE STRING,
REAMT TYPE STRING,
RACUR TYPE STRING,
REPER TYPE STRING,
MONHL TYPE STRING,
MHCUR TYPE STRING,
YERHL TYPE STRING,
YHCUR TYPE STRING,
INCHL TYPE STRING,
INCUR TYPE STRING,
INMBS TYPE STRING,
INYEB TYPE STRING,
INRCP TYPE STRING,
INSPM TYPE STRING,
INERS TYPE STRING,
INSTO TYPE STRING,
INRPS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC2CN_DTR_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_PC2CN_DTR_STR-DEGRP sy-vline 
WA_PC2CN_DTR_STR-DEGRPT sy-vline 
WA_PC2CN_DTR_STR-TRRUL sy-vline 
WA_PC2CN_DTR_STR-REAMT sy-vline 
WA_PC2CN_DTR_STR-RACUR sy-vline 
WA_PC2CN_DTR_STR-REPER sy-vline 
WA_PC2CN_DTR_STR-MONHL sy-vline 
WA_PC2CN_DTR_STR-MHCUR sy-vline 
WA_PC2CN_DTR_STR-YERHL sy-vline 
WA_PC2CN_DTR_STR-YHCUR sy-vline 
WA_PC2CN_DTR_STR-INCHL sy-vline 
WA_PC2CN_DTR_STR-INCUR sy-vline 
WA_PC2CN_DTR_STR-INMBS sy-vline 
WA_PC2CN_DTR_STR-INYEB sy-vline 
WA_PC2CN_DTR_STR-INRCP sy-vline 
WA_PC2CN_DTR_STR-INSPM sy-vline 
WA_PC2CN_DTR_STR-INERS sy-vline 
WA_PC2CN_DTR_STR-INSTO sy-vline 
WA_PC2CN_DTR_STR-INRPS sy-vline      INTO ld_text SEPARATED BY SPACE.

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