ABAP Select data from SAP table P01P_ZFA_S_ALV_ZKNN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P01P_ZFA_S_ALV_ZKNN 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 P01P_ZFA_S_ALV_ZKNN. 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 P01P_ZFA_S_ALV_ZKNN 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_P01P_ZFA_S_ALV_ZKNN TYPE STANDARD TABLE OF P01P_ZFA_S_ALV_ZKNN,
      WA_P01P_ZFA_S_ALV_ZKNN TYPE P01P_ZFA_S_ALV_ZKNN,
      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: <P01P_ZFA_S_ALV_ZKNN> TYPE P01P_ZFA_S_ALV_ZKNN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P01P_ZFA_S_ALV_ZKNN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P01P_ZFA_S_ALV_ZKNN
  INTO TABLE IT_P01P_ZFA_S_ALV_ZKNN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P01P_ZFA_S_ALV_ZKNN
*  INTO TABLE @DATA(IT_P01P_ZFA_S_ALV_ZKNN2).
*--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_P01P_ZFA_S_ALV_ZKNN INDEX 1 INTO DATA(WA_P01P_ZFA_S_ALV_ZKNN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P01P_ZFA_S_ALV_ZKNN ASSIGNING <P01P_ZFA_S_ALV_ZKNN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P01P_ZFA_S_ALV_ZKNN>-OBJECT = 1.
<P01P_ZFA_S_ALV_ZKNN>-ZUSID = 1.
<P01P_ZFA_S_ALV_ZKNN>-LFDNR = 1.
<P01P_ZFA_S_ALV_ZKNN>-PERNR = 1.
<P01P_ZFA_S_ALV_ZKNN>-STATUS = 1.

ENDLOOP.

LOOP AT IT_P01P_ZFA_S_ALV_ZKNN INTO WA_P01P_ZFA_S_ALV_ZKNN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P01P_ZFA_S_ALV_ZKNN-STATUS_TEXT, sy-vline,
  WA_P01P_ZFA_S_ALV_ZKNN-STATUS_REPLY, sy-vline,
  WA_P01P_ZFA_S_ALV_ZKNN-STATUS_REPLY_TEXT, sy-vline,
  WA_P01P_ZFA_S_ALV_ZKNN-VONKG, sy-vline,
  WA_P01P_ZFA_S_ALV_ZKNN-BISKG, sy-vline,
  WA_P01P_ZFA_S_ALV_ZKNN-KIZAH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P01P_ZFA_S_ALV_ZKNN 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_P01P_ZFA_S_ALV_ZKNN 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_P01P_ZFA_S_ALV_ZKNN INTO WA_P01P_ZFA_S_ALV_ZKNN.


*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 PDATE, internal->external for field FGBDT
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_P01P_ZFA_S_ALV_ZKNN-FGBDT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P01P_ZFA_S_ALV_ZKNN-FGBDT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PDATE, internal->external for field GEBDT
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_P01P_ZFA_S_ALV_ZKNN-GEBDT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P01P_ZFA_S_ALV_ZKNN-GEBDT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PDATE, internal->external for field GBDAT
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_P01P_ZFA_S_ALV_ZKNN-GBDAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P01P_ZFA_S_ALV_ZKNN-GBDAT.
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_P01P_ZFA_S_ALV_ZKNN_STR, 
OBJECT TYPE STRING,
ZUSID TYPE STRING,
LFDNR TYPE STRING,
PERNR TYPE STRING,
STATUS TYPE STRING,
STATUS_TEXT TYPE STRING,
STATUS_REPLY TYPE STRING,
STATUS_REPLY_TEXT TYPE STRING,
VONKG TYPE STRING,
BISKG TYPE STRING,
KIZAH TYPE STRING,
FNAME TYPE STRING,
FAVOR TYPE STRING,
FGBDT TYPE STRING,
NNAME TYPE STRING,
VNAME TYPE STRING,
NAME2 TYPE STRING,
GEBDT TYPE STRING,
KIDNO TYPE STRING,
WEITK TYPE STRING,
VON TYPE STRING,
BIS TYPE STRING,
IDNR_KIZA TYPE STRING,
IDNR_KIND TYPE STRING,
BNDUE TYPE STRING,
NACHN TYPE STRING,
VORNA TYPE STRING,
GBDAT TYPE STRING,
ANZAHL_KGBEZUG TYPE STRING,
ZFAID TYPE STRING,
GLBID TYPE STRING,
TESTD TYPE STRING,
WERKS_FAKA TYPE STRING,
BTRTL_FAKA TYPE STRING,
SIDNR TYPE STRING,
FAMKA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P01P_ZFA_S_ALV_ZKNN_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_P01P_ZFA_S_ALV_ZKNN_STR-OBJECT sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-ZUSID sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-LFDNR sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-PERNR sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-STATUS sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-STATUS_TEXT sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-STATUS_REPLY sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-STATUS_REPLY_TEXT sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-VONKG sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-BISKG sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-KIZAH sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-FNAME sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-FAVOR sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-FGBDT sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-NNAME sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-VNAME sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-NAME2 sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-GEBDT sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-KIDNO sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-WEITK sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-VON sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-BIS sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-IDNR_KIZA sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-IDNR_KIND sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-BNDUE sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-NACHN sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-VORNA sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-GBDAT sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-ANZAHL_KGBEZUG sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-ZFAID sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-GLBID sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-TESTD sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-WERKS_FAKA sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-BTRTL_FAKA sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-SIDNR sy-vline 
WA_P01P_ZFA_S_ALV_ZKNN_STR-FAMKA sy-vline      INTO ld_text SEPARATED BY SPACE.

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