ABAP Select data from SAP table FKKPRNH_MSG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKPRNH_MSG
*  INTO TABLE @DATA(IT_FKKPRNH_MSG2).
*--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_FKKPRNH_MSG INDEX 1 INTO DATA(WA_FKKPRNH_MSG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKPRNH_MSG>-MANDT = 1.
<FKKPRNH_MSG>-PNNUM = 1.
<FKKPRNH_MSG>-PNHKF = 1.
<FKKPRNH_MSG>-GPART = 1.
<FKKPRNH_MSG>-ORI_GPART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKPRNH_MSG-PNEXD, sy-vline,
  WA_FKKPRNH_MSG-PNSTA, sy-vline,
  WA_FKKPRNH_MSG-MNDID, sy-vline,
  WA_FKKPRNH_MSG-BETRW, sy-vline,
  WA_FKKPRNH_MSG-BETRW_ACT, sy-vline,
  WA_FKKPRNH_MSG-WAERS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKPRNH_MSG 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_FKKPRNH_MSG 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_FKKPRNH_MSG INTO WA_FKKPRNH_MSG.


*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 PNNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKPRNH_MSG-PNNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKPRNH_MSG-PNNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKPRNH_MSG-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKPRNH_MSG-GPART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORI_GPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKPRNH_MSG-ORI_GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKPRNH_MSG-ORI_GPART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PNXREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKPRNH_MSG-PNXREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKPRNH_MSG-PNXREF.
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_FKKPRNH_MSG_STR, 
MANDT TYPE STRING,
PNNUM TYPE STRING,
PNHKF TYPE STRING,
GPART TYPE STRING,
ORI_GPART TYPE STRING,
PNEXD TYPE STRING,
PNSTA TYPE STRING,
MNDID TYPE STRING,
BETRW TYPE STRING,
BETRW_ACT TYPE STRING,
WAERS TYPE STRING,
LAUFD_CRE TYPE STRING,
LAUFI_CRE TYPE STRING,
PAYNO TYPE STRING,
DOC1R TYPE STRING,
DOC1T TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
COTYP TYPE STRING,
COKEY TYPE STRING,
PNXREF TYPE STRING,
PYBUK TYPE STRING,
ERNAM TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
AETIM TYPE STRING,
ZIBAN TYPE STRING,
EMBVT TYPE STRING,
XCREA TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,
MSGTX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKPRNH_MSG_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_FKKPRNH_MSG_STR-MANDT sy-vline 
WA_FKKPRNH_MSG_STR-PNNUM sy-vline 
WA_FKKPRNH_MSG_STR-PNHKF sy-vline 
WA_FKKPRNH_MSG_STR-GPART sy-vline 
WA_FKKPRNH_MSG_STR-ORI_GPART sy-vline 
WA_FKKPRNH_MSG_STR-PNEXD sy-vline 
WA_FKKPRNH_MSG_STR-PNSTA sy-vline 
WA_FKKPRNH_MSG_STR-MNDID sy-vline 
WA_FKKPRNH_MSG_STR-BETRW sy-vline 
WA_FKKPRNH_MSG_STR-BETRW_ACT sy-vline 
WA_FKKPRNH_MSG_STR-WAERS sy-vline 
WA_FKKPRNH_MSG_STR-LAUFD_CRE sy-vline 
WA_FKKPRNH_MSG_STR-LAUFI_CRE sy-vline 
WA_FKKPRNH_MSG_STR-PAYNO sy-vline 
WA_FKKPRNH_MSG_STR-DOC1R sy-vline 
WA_FKKPRNH_MSG_STR-DOC1T sy-vline 
WA_FKKPRNH_MSG_STR-CPUDT sy-vline 
WA_FKKPRNH_MSG_STR-CPUTM sy-vline 
WA_FKKPRNH_MSG_STR-COTYP sy-vline 
WA_FKKPRNH_MSG_STR-COKEY sy-vline 
WA_FKKPRNH_MSG_STR-PNXREF sy-vline 
WA_FKKPRNH_MSG_STR-PYBUK sy-vline 
WA_FKKPRNH_MSG_STR-ERNAM sy-vline 
WA_FKKPRNH_MSG_STR-AENAM sy-vline 
WA_FKKPRNH_MSG_STR-AEDAT sy-vline 
WA_FKKPRNH_MSG_STR-AETIM sy-vline 
WA_FKKPRNH_MSG_STR-ZIBAN sy-vline 
WA_FKKPRNH_MSG_STR-EMBVT sy-vline 
WA_FKKPRNH_MSG_STR-XCREA sy-vline 
WA_FKKPRNH_MSG_STR-MSGID sy-vline 
WA_FKKPRNH_MSG_STR-MSGNO sy-vline 
WA_FKKPRNH_MSG_STR-MSGTX sy-vline      INTO ld_text SEPARATED BY SPACE.

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