ABAP Select data from SAP table PAYDK_NATIONAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PAYDK_NATIONAL
*  INTO TABLE @DATA(IT_PAYDK_NATIONAL2).
*--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_PAYDK_NATIONAL INDEX 1 INTO DATA(WA_PAYDK_NATIONAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PAYDK_NATIONAL>-MPENS = 1.
<PAYDK_NATIONAL>-MPAC = 1.
<PAYDK_NATIONAL>-MATP = 1.
<PAYDK_NATIONAL>-MTAX = 1.
<PAYDK_NATIONAL>-MVAC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PAYDK_NATIONAL-MGAR, sy-vline,
  WA_PAYDK_NATIONAL-MSTAT, sy-vline,
  WA_PAYDK_NATIONAL-MACC, sy-vline,
  WA_PAYDK_NATIONAL-MFA, sy-vline,
  WA_PAYDK_NATIONAL-MPBS, sy-vline,
  WA_PAYDK_NATIONAL-MURSP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PAYDK_NATIONAL 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_PAYDK_NATIONAL 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_PAYDK_NATIONAL INTO WA_PAYDK_NATIONAL.


*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 UABRJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PAYDK_NATIONAL-UABRJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PAYDK_NATIONAL-UABRJ.
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_PAYDK_NATIONAL_STR, 
MPENS TYPE STRING,
MPAC TYPE STRING,
MATP TYPE STRING,
MTAX TYPE STRING,
MVAC TYPE STRING,
MGAR TYPE STRING,
MSTAT TYPE STRING,
MACC TYPE STRING,
MFA TYPE STRING,
MPBS TYPE STRING,
MURSP TYPE STRING,
UABKR TYPE STRING,
UABRP TYPE STRING,
UABRJ TYPE STRING,
MABS TYPE STRING,
MVENT TYPE STRING,
MABSC TYPE STRING,
MLON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PAYDK_NATIONAL_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_PAYDK_NATIONAL_STR-MPENS sy-vline 
WA_PAYDK_NATIONAL_STR-MPAC sy-vline 
WA_PAYDK_NATIONAL_STR-MATP sy-vline 
WA_PAYDK_NATIONAL_STR-MTAX sy-vline 
WA_PAYDK_NATIONAL_STR-MVAC sy-vline 
WA_PAYDK_NATIONAL_STR-MGAR sy-vline 
WA_PAYDK_NATIONAL_STR-MSTAT sy-vline 
WA_PAYDK_NATIONAL_STR-MACC sy-vline 
WA_PAYDK_NATIONAL_STR-MFA sy-vline 
WA_PAYDK_NATIONAL_STR-MPBS sy-vline 
WA_PAYDK_NATIONAL_STR-MURSP sy-vline 
WA_PAYDK_NATIONAL_STR-UABKR sy-vline 
WA_PAYDK_NATIONAL_STR-UABRP sy-vline 
WA_PAYDK_NATIONAL_STR-UABRJ sy-vline 
WA_PAYDK_NATIONAL_STR-MABS sy-vline 
WA_PAYDK_NATIONAL_STR-MVENT sy-vline 
WA_PAYDK_NATIONAL_STR-MABSC sy-vline 
WA_PAYDK_NATIONAL_STR-MLON sy-vline      INTO ld_text SEPARATED BY SPACE.

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