ABAP Select data from SAP table WRF_PO_DATA_STY into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WRF_PO_DATA_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 WRF_PO_DATA_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 WRF_PO_DATA_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_WRF_PO_DATA_STY TYPE STANDARD TABLE OF WRF_PO_DATA_STY,
      WA_WRF_PO_DATA_STY TYPE WRF_PO_DATA_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: <WRF_PO_DATA_STY> TYPE WRF_PO_DATA_STY.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WRF_PO_DATA_STY
*  INTO TABLE @DATA(IT_WRF_PO_DATA_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_WRF_PO_DATA_STY INDEX 1 INTO DATA(WA_WRF_PO_DATA_STY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WRF_PO_DATA_STY>-FIXPO = 1.
<WRF_PO_DATA_STY>-AUREL = 1.
<WRF_PO_DATA_STY>-LIFNR = 1.
<WRF_PO_DATA_STY>-SATNR = 1.
<WRF_PO_DATA_STY>-EINDT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WRF_PO_DATA_STY-PLID, sy-vline,
  WA_WRF_PO_DATA_STY-PLITEM, sy-vline,
  WA_WRF_PO_DATA_STY-PLSUBITEM, sy-vline,
  WA_WRF_PO_DATA_STY-MATNR, sy-vline,
  WA_WRF_PO_DATA_STY-KEYFIG, sy-vline,
  WA_WRF_PO_DATA_STY-DC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WRF_PO_DATA_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_WRF_PO_DATA_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_WRF_PO_DATA_STY INTO WA_WRF_PO_DATA_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 LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WRF_PO_DATA_STY-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_PO_DATA_STY-LIFNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit PLID1, internal->external for field PLID
CALL FUNCTION 'CONVERSION_EXIT_PLID1_OUTPUT'
  EXPORTING
    input =                      WA_WRF_PO_DATA_STY-PLID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_PO_DATA_STY-PLID.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit CUNIT, internal->external for field ACT_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WRF_PO_DATA_STY-ACT_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_PO_DATA_STY-ACT_UNIT.
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_WRF_PO_DATA_STY_STR, 
FIXPO TYPE STRING,
AUREL TYPE STRING,
LIFNR TYPE STRING,
SATNR TYPE STRING,
EINDT TYPE STRING,
PLID TYPE STRING,
PLITEM TYPE STRING,
PLSUBITEM TYPE STRING,
MATNR TYPE STRING,
KEYFIG TYPE STRING,
DC TYPE STRING,
HIER_ID TYPE STRING,
NODE TYPE STRING,
ASRT_TYPE TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
ATTYP TYPE STRING,
QUAN_ASGN TYPE STRING,
ACT_QUAN TYPE STRING,
DL_ID TYPE STRING,
KEYFIG_FIXED TYPE STRING,
KEYFIG_PRIORITY TYPE STRING,
ITEM_DETAILS TYPE STRING,
UNIT TYPE STRING,
ACT_UNIT TYPE STRING,
KZ_SPLITT TYPE STRING,
GROUP_NR TYPE STRING,
SPLITT_NR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WRF_PO_DATA_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_WRF_PO_DATA_STY_STR-FIXPO sy-vline 
WA_WRF_PO_DATA_STY_STR-AUREL sy-vline 
WA_WRF_PO_DATA_STY_STR-LIFNR sy-vline 
WA_WRF_PO_DATA_STY_STR-SATNR sy-vline 
WA_WRF_PO_DATA_STY_STR-EINDT sy-vline 
WA_WRF_PO_DATA_STY_STR-PLID sy-vline 
WA_WRF_PO_DATA_STY_STR-PLITEM sy-vline 
WA_WRF_PO_DATA_STY_STR-PLSUBITEM sy-vline 
WA_WRF_PO_DATA_STY_STR-MATNR sy-vline 
WA_WRF_PO_DATA_STY_STR-KEYFIG sy-vline 
WA_WRF_PO_DATA_STY_STR-DC sy-vline 
WA_WRF_PO_DATA_STY_STR-HIER_ID sy-vline 
WA_WRF_PO_DATA_STY_STR-NODE sy-vline 
WA_WRF_PO_DATA_STY_STR-ASRT_TYPE sy-vline 
WA_WRF_PO_DATA_STY_STR-EKORG sy-vline 
WA_WRF_PO_DATA_STY_STR-EKGRP sy-vline 
WA_WRF_PO_DATA_STY_STR-EBELN sy-vline 
WA_WRF_PO_DATA_STY_STR-EBELP sy-vline 
WA_WRF_PO_DATA_STY_STR-ATTYP sy-vline 
WA_WRF_PO_DATA_STY_STR-QUAN_ASGN sy-vline 
WA_WRF_PO_DATA_STY_STR-ACT_QUAN sy-vline 
WA_WRF_PO_DATA_STY_STR-DL_ID sy-vline 
WA_WRF_PO_DATA_STY_STR-KEYFIG_FIXED sy-vline 
WA_WRF_PO_DATA_STY_STR-KEYFIG_PRIORITY sy-vline 
WA_WRF_PO_DATA_STY_STR-ITEM_DETAILS sy-vline 
WA_WRF_PO_DATA_STY_STR-UNIT sy-vline 
WA_WRF_PO_DATA_STY_STR-ACT_UNIT sy-vline 
WA_WRF_PO_DATA_STY_STR-KZ_SPLITT sy-vline 
WA_WRF_PO_DATA_STY_STR-GROUP_NR sy-vline 
WA_WRF_PO_DATA_STY_STR-SPLITT_NR sy-vline      INTO ld_text SEPARATED BY SPACE.

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