ABAP Select data from SAP table PCN_CTXF0 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PCN_CTXF0 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 PCN_CTXF0. 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 PCN_CTXF0 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_PCN_CTXF0 TYPE STANDARD TABLE OF PCN_CTXF0,
      WA_PCN_CTXF0 TYPE PCN_CTXF0,
      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: <PCN_CTXF0> TYPE PCN_CTXF0.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PCN_CTXF0.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PCN_CTXF0
  INTO TABLE IT_PCN_CTXF0.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PCN_CTXF0
*  INTO TABLE @DATA(IT_PCN_CTXF02).
*--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_PCN_CTXF0 INDEX 1 INTO DATA(WA_PCN_CTXF02).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PCN_CTXF0 ASSIGNING <PCN_CTXF0>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PCN_CTXF0>-INCOM = 1.
<PCN_CTXF0>-INCCN = 1.
<PCN_CTXF0>-INCOC = 1.
<PCN_CTXF0>-TAXAB = 1.
<PCN_CTXF0>-TAXPA = 1.

ENDLOOP.

LOOP AT IT_PCN_CTXF0 INTO WA_PCN_CTXF0.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PCN_CTXF0-TAXPR, sy-vline,
  WA_PCN_CTXF0-FOTAX, sy-vline,
  WA_PCN_CTXF0-TAXOW, sy-vline,
  WA_PCN_CTXF0-PHFEE, sy-vline,
  WA_PCN_CTXF0-PIEE, sy-vline,
  WA_PCN_CTXF0-UIEE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PCN_CTXF0 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_PCN_CTXF0 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_PCN_CTXF0 INTO WA_PCN_CTXF0.


*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_PCN_CTXF0_STR, 
INCOM TYPE STRING,
INCCN TYPE STRING,
INCOC TYPE STRING,
TAXAB TYPE STRING,
TAXPA TYPE STRING,
TAXPR TYPE STRING,
FOTAX TYPE STRING,
TAXOW TYPE STRING,
PHFEE TYPE STRING,
PIEE TYPE STRING,
UIEE TYPE STRING,
MIEE TYPE STRING,
IIEE TYPE STRING,
BIEE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PCN_CTXF0_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_PCN_CTXF0_STR-INCOM sy-vline 
WA_PCN_CTXF0_STR-INCCN sy-vline 
WA_PCN_CTXF0_STR-INCOC sy-vline 
WA_PCN_CTXF0_STR-TAXAB sy-vline 
WA_PCN_CTXF0_STR-TAXPA sy-vline 
WA_PCN_CTXF0_STR-TAXPR sy-vline 
WA_PCN_CTXF0_STR-FOTAX sy-vline 
WA_PCN_CTXF0_STR-TAXOW sy-vline 
WA_PCN_CTXF0_STR-PHFEE sy-vline 
WA_PCN_CTXF0_STR-PIEE sy-vline 
WA_PCN_CTXF0_STR-UIEE sy-vline 
WA_PCN_CTXF0_STR-MIEE sy-vline 
WA_PCN_CTXF0_STR-IIEE sy-vline 
WA_PCN_CTXF0_STR-BIEE sy-vline      INTO ld_text SEPARATED BY SPACE.

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