ABAP Select data from SAP table /KYK/PO_POWL_STY into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /KYK/PO_POWL_STY 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 /KYK/PO_POWL_STY. 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 /KYK/PO_POWL_STY 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_/KYK/PO_POWL_STY TYPE STANDARD TABLE OF /KYK/PO_POWL_STY,
      WA_/KYK/PO_POWL_STY TYPE /KYK/PO_POWL_STY,
      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: </KYK/PO_POWL_STY> TYPE /KYK/PO_POWL_STY.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /KYK/PO_POWL_STY
  INTO TABLE IT_/KYK/PO_POWL_STY.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /KYK/PO_POWL_STY
*  INTO TABLE @DATA(IT_/KYK/PO_POWL_STY2).
*--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_/KYK/PO_POWL_STY INDEX 1 INTO DATA(WA_/KYK/PO_POWL_STY2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/KYK/PO_POWL_STY ASSIGNING </KYK/PO_POWL_STY>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</KYK/PO_POWL_STY>-EBELN = 1.
</KYK/PO_POWL_STY>-EBELP = 1.
</KYK/PO_POWL_STY>-LIFNR = 1.
</KYK/PO_POWL_STY>-BSART = 1.
</KYK/PO_POWL_STY>-EKGRP = 1.

ENDLOOP.

LOOP AT IT_/KYK/PO_POWL_STY INTO WA_/KYK/PO_POWL_STY.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/KYK/PO_POWL_STY-EKORG, sy-vline,
  WA_/KYK/PO_POWL_STY-BEDAT, sy-vline,
  WA_/KYK/PO_POWL_STY-MATNR, sy-vline,
  WA_/KYK/PO_POWL_STY-TXZ01, sy-vline,
  WA_/KYK/PO_POWL_STY-MATKL, sy-vline,
  WA_/KYK/PO_POWL_STY-MENGE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/KYK/PO_POWL_STY 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_/KYK/PO_POWL_STY 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_/KYK/PO_POWL_STY INTO WA_/KYK/PO_POWL_STY.


*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 EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/PO_POWL_STY-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/PO_POWL_STY-EBELN.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/PO_POWL_STY-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/PO_POWL_STY-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/PO_POWL_STY-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/PO_POWL_STY-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BPRME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/PO_POWL_STY-BPRME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/PO_POWL_STY-BPRME.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/PO_POWL_STY-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/PO_POWL_STY-SPRAS.
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_/KYK/PO_POWL_STY_STR, 
EBELN TYPE STRING,
EBELP TYPE STRING,
LIFNR TYPE STRING,
BSART TYPE STRING,
EKGRP TYPE STRING,
EKORG TYPE STRING,
BEDAT TYPE STRING,
MATNR TYPE STRING,
TXZ01 TYPE STRING,
MATKL TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
BPRME TYPE STRING,
NETPR TYPE STRING,
WAERS TYPE STRING,
PEINH TYPE STRING,
NETWR TYPE STRING,
BRTWR TYPE STRING,
BSTAE TYPE STRING,
NAME1 TYPE STRING,
PSTYP TYPE STRING,
KNTTP TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
BANFN TYPE STRING,
BNFPO TYPE STRING,
INFNR TYPE STRING,
KONNR TYPE STRING,
KTPNR TYPE STRING,
IDNLF TYPE STRING,
KZABS TYPE STRING,
LABNR TYPE STRING,
MAHNZ TYPE STRING,
MAHN1 TYPE STRING,
CFLDR_HEAD TYPE STRING,
CFLDR_POS TYPE STRING,
SPRAS TYPE STRING,
LTSNR TYPE STRING,
RESWK TYPE STRING,
EINDT TYPE STRING,
OWEMG TYPE STRING,
OBSMG TYPE STRING,
BSART_TEXT TYPE STRING,
BPRME_TEXT TYPE STRING,
MEINS_TEXT TYPE STRING,
BUKRS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/KYK/PO_POWL_STY_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_/KYK/PO_POWL_STY_STR-EBELN sy-vline 
WA_/KYK/PO_POWL_STY_STR-EBELP sy-vline 
WA_/KYK/PO_POWL_STY_STR-LIFNR sy-vline 
WA_/KYK/PO_POWL_STY_STR-BSART sy-vline 
WA_/KYK/PO_POWL_STY_STR-EKGRP sy-vline 
WA_/KYK/PO_POWL_STY_STR-EKORG sy-vline 
WA_/KYK/PO_POWL_STY_STR-BEDAT sy-vline 
WA_/KYK/PO_POWL_STY_STR-MATNR sy-vline 
WA_/KYK/PO_POWL_STY_STR-TXZ01 sy-vline 
WA_/KYK/PO_POWL_STY_STR-MATKL sy-vline 
WA_/KYK/PO_POWL_STY_STR-MENGE sy-vline 
WA_/KYK/PO_POWL_STY_STR-MEINS sy-vline 
WA_/KYK/PO_POWL_STY_STR-BPRME sy-vline 
WA_/KYK/PO_POWL_STY_STR-NETPR sy-vline 
WA_/KYK/PO_POWL_STY_STR-WAERS sy-vline 
WA_/KYK/PO_POWL_STY_STR-PEINH sy-vline 
WA_/KYK/PO_POWL_STY_STR-NETWR sy-vline 
WA_/KYK/PO_POWL_STY_STR-BRTWR sy-vline 
WA_/KYK/PO_POWL_STY_STR-BSTAE sy-vline 
WA_/KYK/PO_POWL_STY_STR-NAME1 sy-vline 
WA_/KYK/PO_POWL_STY_STR-PSTYP sy-vline 
WA_/KYK/PO_POWL_STY_STR-KNTTP sy-vline 
WA_/KYK/PO_POWL_STY_STR-WERKS sy-vline 
WA_/KYK/PO_POWL_STY_STR-LGORT sy-vline 
WA_/KYK/PO_POWL_STY_STR-BANFN sy-vline 
WA_/KYK/PO_POWL_STY_STR-BNFPO sy-vline 
WA_/KYK/PO_POWL_STY_STR-INFNR sy-vline 
WA_/KYK/PO_POWL_STY_STR-KONNR sy-vline 
WA_/KYK/PO_POWL_STY_STR-KTPNR sy-vline 
WA_/KYK/PO_POWL_STY_STR-IDNLF sy-vline 
WA_/KYK/PO_POWL_STY_STR-KZABS sy-vline 
WA_/KYK/PO_POWL_STY_STR-LABNR sy-vline 
WA_/KYK/PO_POWL_STY_STR-MAHNZ sy-vline 
WA_/KYK/PO_POWL_STY_STR-MAHN1 sy-vline 
WA_/KYK/PO_POWL_STY_STR-CFLDR_HEAD sy-vline 
WA_/KYK/PO_POWL_STY_STR-CFLDR_POS sy-vline 
WA_/KYK/PO_POWL_STY_STR-SPRAS sy-vline 
WA_/KYK/PO_POWL_STY_STR-LTSNR sy-vline 
WA_/KYK/PO_POWL_STY_STR-RESWK sy-vline 
WA_/KYK/PO_POWL_STY_STR-EINDT sy-vline 
WA_/KYK/PO_POWL_STY_STR-OWEMG sy-vline 
WA_/KYK/PO_POWL_STY_STR-OBSMG sy-vline 
WA_/KYK/PO_POWL_STY_STR-BSART_TEXT sy-vline 
WA_/KYK/PO_POWL_STY_STR-BPRME_TEXT sy-vline 
WA_/KYK/PO_POWL_STY_STR-MEINS_TEXT sy-vline 
WA_/KYK/PO_POWL_STY_STR-BUKRS sy-vline      INTO ld_text SEPARATED BY SPACE.

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