ABAP Select data from SAP table PCN_FORM_YEA_TAX_NR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PCN_FORM_YEA_TAX_NR 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_FORM_YEA_TAX_NR. 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_FORM_YEA_TAX_NR 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_FORM_YEA_TAX_NR TYPE STANDARD TABLE OF PCN_FORM_YEA_TAX_NR,
      WA_PCN_FORM_YEA_TAX_NR TYPE PCN_FORM_YEA_TAX_NR,
      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_FORM_YEA_TAX_NR> TYPE PCN_FORM_YEA_TAX_NR.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PCN_FORM_YEA_TAX_NR
*  INTO TABLE @DATA(IT_PCN_FORM_YEA_TAX_NR2).
*--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_FORM_YEA_TAX_NR INDEX 1 INTO DATA(WA_PCN_FORM_YEA_TAX_NR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PCN_FORM_YEA_TAX_NR>-CNAME = 1.
<PCN_FORM_YEA_TAX_NR>-ICNUM = 1.
<PCN_FORM_YEA_TAX_NR>-TXYEA = 1.
<PCN_FORM_YEA_TAX_NR>-TELNO = 1.
<PCN_FORM_YEA_TAX_NR>-USRID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PCN_FORM_YEA_TAX_NR-POSTCODE, sy-vline,
  WA_PCN_FORM_YEA_TAX_NR-PROVINCE, sy-vline,
  WA_PCN_FORM_YEA_TAX_NR-CITY, sy-vline,
  WA_PCN_FORM_YEA_TAX_NR-DISTRICT, sy-vline,
  WA_PCN_FORM_YEA_TAX_NR-STREET, sy-vline,
  WA_PCN_FORM_YEA_TAX_NR-DETAIL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PCN_FORM_YEA_TAX_NR 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_FORM_YEA_TAX_NR 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_FORM_YEA_TAX_NR INTO WA_PCN_FORM_YEA_TAX_NR.


*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 GJAHR, internal->external for field TXYEA
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PCN_FORM_YEA_TAX_NR-TXYEA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PCN_FORM_YEA_TAX_NR-TXYEA.
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_PCN_FORM_YEA_TAX_NR_STR, 
CNAME TYPE STRING,
ICNUM TYPE STRING,
TXYEA TYPE STRING,
TELNO TYPE STRING,
USRID TYPE STRING,
POSTCODE TYPE STRING,
PROVINCE TYPE STRING,
CITY TYPE STRING,
DISTRICT TYPE STRING,
STREET TYPE STRING,
DETAIL TYPE STRING,
ENTXI TYPE STRING,
TAXGPT TYPE STRING,
WAERS TYPE STRING,
SAL_INC TYPE STRING,
SAL_TXBL_INC TYPE STRING,
SAL_TAX_DEDUTD TYPE STRING,
SAL_TAX_PAID TYPE STRING,
RPS_INC TYPE STRING,
RPS_TXBL_INC TYPE STRING,
RPS_TAX_DEDUTD TYPE STRING,
RPS_TAX_PAID TYPE STRING,
BONU_INC TYPE STRING,
BONU_TXBL_INC TYPE STRING,
BONU_TAX_DEDUTD TYPE STRING,
BONU_TAX_PAID TYPE STRING,
SO_INC TYPE STRING,
SO_TXBL_INC TYPE STRING,
SO_TAX_DEDUTD TYPE STRING,
SO_TAX_PAID TYPE STRING,
IDB_INC TYPE STRING,
IDB_TXBL_INC TYPE STRING,
IDB_TAX_PAID TYPE STRING,
INCID_INC TYPE STRING,
INCID_TXBL_INC TYPE STRING,
INCID_TAX_PAID TYPE STRING,
ROYALTY_INC TYPE STRING,
ROYALTY_TXBL_INC TYPE STRING,
ROYALTY_TAX_DEDUTD TYPE STRING,
ROYALTY_TAX_PAID TYPE STRING,
SEV_INC TYPE STRING,
SEV_TXBL_INC TYPE STRING,
SEV_TAX_DEDUTD TYPE STRING,
SEV_TAX_PAID TYPE STRING,
DETAILS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PCN_FORM_YEA_TAX_NR_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_FORM_YEA_TAX_NR_STR-CNAME sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-ICNUM sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-TXYEA sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-TELNO sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-USRID sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-POSTCODE sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-PROVINCE sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-CITY sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-DISTRICT sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-STREET sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-DETAIL sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-ENTXI sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-TAXGPT sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-WAERS sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-SAL_INC sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-SAL_TXBL_INC sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-SAL_TAX_DEDUTD sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-SAL_TAX_PAID sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-RPS_INC sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-RPS_TXBL_INC sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-RPS_TAX_DEDUTD sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-RPS_TAX_PAID sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-BONU_INC sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-BONU_TXBL_INC sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-BONU_TAX_DEDUTD sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-BONU_TAX_PAID sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-SO_INC sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-SO_TXBL_INC sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-SO_TAX_DEDUTD sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-SO_TAX_PAID sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-IDB_INC sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-IDB_TXBL_INC sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-IDB_TAX_PAID sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-INCID_INC sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-INCID_TXBL_INC sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-INCID_TAX_PAID sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-ROYALTY_INC sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-ROYALTY_TXBL_INC sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-ROYALTY_TAX_DEDUTD sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-ROYALTY_TAX_PAID sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-SEV_INC sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-SEV_TXBL_INC sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-SEV_TAX_DEDUTD sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-SEV_TAX_PAID sy-vline 
WA_PCN_FORM_YEA_TAX_NR_STR-DETAILS sy-vline      INTO ld_text SEPARATED BY SPACE.

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