ABAP Select data from SAP table PNBK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PNBK
*  INTO TABLE @DATA(IT_PNBK2).
*--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_PNBK INDEX 1 INTO DATA(WA_PNBK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PNBK>-MANDT = 1.
<PNBK>-ZBNKS = 1.
<PNBK>-ZBNKL = 1.
<PNBK>-ZBNKN = 1.
<PNBK>-BKONT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PNBK-KOART, sy-vline,
  WA_PNBK-ACCNT, sy-vline,
  WA_PNBK-PERNR, sy-vline,
  WA_PNBK-INFTY, sy-vline,
  WA_PNBK-ZNME1, sy-vline,
  WA_PNBK-BKREF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PNBK 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_PNBK 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_PNBK INTO WA_PNBK.


*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 ACCNT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PNBK-ACCNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PNBK-ACCNT.
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_PNBK_STR, 
MANDT TYPE STRING,
ZBNKS TYPE STRING,
ZBNKL TYPE STRING,
ZBNKN TYPE STRING,
BKONT TYPE STRING,
KOART TYPE STRING,
ACCNT TYPE STRING,
PERNR TYPE STRING,
INFTY TYPE STRING,
ZNME1 TYPE STRING,
BKREF TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,
ERRTY TYPE STRING,
ERRCD TYPE STRING,
ERRTX TYPE STRING,
XERRO TYPE STRING,
XUPDT TYPE STRING,
XFIXD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PNBK_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_PNBK_STR-MANDT sy-vline 
WA_PNBK_STR-ZBNKS sy-vline 
WA_PNBK_STR-ZBNKL sy-vline 
WA_PNBK_STR-ZBNKN sy-vline 
WA_PNBK_STR-BKONT sy-vline 
WA_PNBK_STR-KOART sy-vline 
WA_PNBK_STR-ACCNT sy-vline 
WA_PNBK_STR-PERNR sy-vline 
WA_PNBK_STR-INFTY sy-vline 
WA_PNBK_STR-ZNME1 sy-vline 
WA_PNBK_STR-BKREF sy-vline 
WA_PNBK_STR-LAUFD sy-vline 
WA_PNBK_STR-LAUFI sy-vline 
WA_PNBK_STR-ERRTY sy-vline 
WA_PNBK_STR-ERRCD sy-vline 
WA_PNBK_STR-ERRTX sy-vline 
WA_PNBK_STR-XERRO sy-vline 
WA_PNBK_STR-XUPDT sy-vline 
WA_PNBK_STR-XFIXD sy-vline      INTO ld_text SEPARATED BY SPACE.

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