ABAP Select data from SAP table P2CKT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2CKT 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 P2CKT. 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 P2CKT 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_P2CKT TYPE STANDARD TABLE OF P2CKT,
      WA_P2CKT TYPE P2CKT,
      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: <P2CKT> TYPE P2CKT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2CKT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2CKT
  INTO TABLE IT_P2CKT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2CKT
*  INTO TABLE @DATA(IT_P2CKT2).
*--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_P2CKT INDEX 1 INTO DATA(WA_P2CKT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2CKT ASSIGNING <P2CKT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2CKT>-EBUKR = 1.
<P2CKT>-EGSBR = 1.
<P2CKT>-EKKRS = 1.
<P2CKT>-EKOST = 1.
<P2CKT>-RUKNR = 1.

ENDLOOP.

LOOP AT IT_P2CKT INTO WA_P2CKT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2CKT-AUFNR, sy-vline,
  WA_P2CKT-AVONR, sy-vline,
  WA_P2CKT-PROJN, sy-vline,
  WA_P2CKT-SBUKR, sy-vline,
  WA_P2CKT-SGSBR, sy-vline,
  WA_P2CKT-SKKRS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2CKT 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_P2CKT 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_P2CKT INTO WA_P2CKT.


*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 EKOST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P2CKT-EKOST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P2CKT-EKOST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P2CKT-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P2CKT-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PROJN
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_P2CKT-PROJN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P2CKT-PROJN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SKOST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P2CKT-SKOST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P2CKT-SKOST.
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_P2CKT_STR, 
EBUKR TYPE STRING,
EGSBR TYPE STRING,
EKKRS TYPE STRING,
EKOST TYPE STRING,
RUKNR TYPE STRING,
AUFNR TYPE STRING,
AVONR TYPE STRING,
PROJN TYPE STRING,
SBUKR TYPE STRING,
SGSBR TYPE STRING,
SKKRS TYPE STRING,
SKOST TYPE STRING,
LSTAR TYPE STRING,
EXBEL TYPE STRING,
SYMKO TYPE STRING,
EXUPD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2CKT_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_P2CKT_STR-EBUKR sy-vline 
WA_P2CKT_STR-EGSBR sy-vline 
WA_P2CKT_STR-EKKRS sy-vline 
WA_P2CKT_STR-EKOST sy-vline 
WA_P2CKT_STR-RUKNR sy-vline 
WA_P2CKT_STR-AUFNR sy-vline 
WA_P2CKT_STR-AVONR sy-vline 
WA_P2CKT_STR-PROJN sy-vline 
WA_P2CKT_STR-SBUKR sy-vline 
WA_P2CKT_STR-SGSBR sy-vline 
WA_P2CKT_STR-SKKRS sy-vline 
WA_P2CKT_STR-SKOST sy-vline 
WA_P2CKT_STR-LSTAR sy-vline 
WA_P2CKT_STR-EXBEL sy-vline 
WA_P2CKT_STR-SYMKO sy-vline 
WA_P2CKT_STR-EXUPD sy-vline      INTO ld_text SEPARATED BY SPACE.

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