ABAP Select data from SAP table PKKANBAN_STRUC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PKKANBAN_STRUC
*  INTO TABLE @DATA(IT_PKKANBAN_STRUC2).
*--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_PKKANBAN_STRUC INDEX 1 INTO DATA(WA_PKKANBAN_STRUC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PKKANBAN_STRUC>-PKKEY = 1.
<PKKANBAN_STRUC>-CHARG = 1.
<PKKANBAN_STRUC>-SADT2 = 1.
<PKKANBAN_STRUC>-SAUZ2 = 1.
<PKKANBAN_STRUC>-PABNUM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PKKANBAN_STRUC-PABPOS, sy-vline,
  WA_PKKANBAN_STRUC-PKBMG, sy-vline,
  WA_PKKANBAN_STRUC-MBLNR, sy-vline,
  WA_PKKANBAN_STRUC-MBLPO, sy-vline,
  WA_PKKANBAN_STRUC-PLNUM, sy-vline,
  WA_PKKANBAN_STRUC-AUFNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PKKANBAN_STRUC 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_PKKANBAN_STRUC 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_PKKANBAN_STRUC INTO WA_PKKANBAN_STRUC.


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

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

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

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

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PKKANBAN_STRUC-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKKANBAN_STRUC-EBELN.
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_PKKANBAN_STRUC_STR, 
PKKEY TYPE STRING,
CHARG TYPE STRING,
SADT2 TYPE STRING,
SAUZ2 TYPE STRING,
PABNUM TYPE STRING,
PABPOS TYPE STRING,
PKBMG TYPE STRING,
MBLNR TYPE STRING,
MBLPO TYPE STRING,
PLNUM TYPE STRING,
AUFNR TYPE STRING,
POSNR TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
PKCMG TYPE STRING,
PKIMG TYPE STRING,
PKBST TYPE STRING,
SAEDT TYPE STRING,
SAEUZ TYPE STRING,
TBNUM TYPE STRING,
TBPOS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PKKANBAN_STRUC_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_PKKANBAN_STRUC_STR-PKKEY sy-vline 
WA_PKKANBAN_STRUC_STR-CHARG sy-vline 
WA_PKKANBAN_STRUC_STR-SADT2 sy-vline 
WA_PKKANBAN_STRUC_STR-SAUZ2 sy-vline 
WA_PKKANBAN_STRUC_STR-PABNUM sy-vline 
WA_PKKANBAN_STRUC_STR-PABPOS sy-vline 
WA_PKKANBAN_STRUC_STR-PKBMG sy-vline 
WA_PKKANBAN_STRUC_STR-MBLNR sy-vline 
WA_PKKANBAN_STRUC_STR-MBLPO sy-vline 
WA_PKKANBAN_STRUC_STR-PLNUM sy-vline 
WA_PKKANBAN_STRUC_STR-AUFNR sy-vline 
WA_PKKANBAN_STRUC_STR-POSNR sy-vline 
WA_PKKANBAN_STRUC_STR-EBELN sy-vline 
WA_PKKANBAN_STRUC_STR-EBELP sy-vline 
WA_PKKANBAN_STRUC_STR-RSNUM sy-vline 
WA_PKKANBAN_STRUC_STR-RSPOS sy-vline 
WA_PKKANBAN_STRUC_STR-PKCMG sy-vline 
WA_PKKANBAN_STRUC_STR-PKIMG sy-vline 
WA_PKKANBAN_STRUC_STR-PKBST sy-vline 
WA_PKKANBAN_STRUC_STR-SAEDT sy-vline 
WA_PKKANBAN_STRUC_STR-SAEUZ sy-vline 
WA_PKKANBAN_STRUC_STR-TBNUM sy-vline 
WA_PKKANBAN_STRUC_STR-TBPOS sy-vline      INTO ld_text SEPARATED BY SPACE.

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