ABAP Select data from SAP table IWPPOS into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IWPPOS 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 IWPPOS. 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 IWPPOS 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_IWPPOS TYPE STANDARD TABLE OF IWPPOS,
      WA_IWPPOS TYPE IWPPOS,
      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: <IWPPOS> TYPE IWPPOS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IWPPOS
*  INTO TABLE @DATA(IT_IWPPOS2).
*--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_IWPPOS INDEX 1 INTO DATA(WA_IWPPOS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IWPPOS>-EQUNR = 1.
<IWPPOS>-TPLNR = 1.
<IWPPOS>-BAUTL = 1.
<IWPPOS>-WARPL = 1.
<IWPPOS>-WAPOS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IWPPOS-WSTRA, sy-vline,
  WA_IWPPOS-MITYP, sy-vline,
  WA_IWPPOS-EQKTX, sy-vline,
  WA_IWPPOS-PLTXT, sy-vline,
  WA_IWPPOS-MAKTX, sy-vline,
  WA_IWPPOS-WPTXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IWPPOS 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_IWPPOS 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_IWPPOS INTO WA_IWPPOS.


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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IWPPOS-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IWPPOS-KOSTL.
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_IWPPOS_STR, 
EQUNR TYPE STRING,
TPLNR TYPE STRING,
BAUTL TYPE STRING,
WARPL TYPE STRING,
WAPOS TYPE STRING,
WSTRA TYPE STRING,
MITYP TYPE STRING,
EQKTX TYPE STRING,
PLTXT TYPE STRING,
MAKTX TYPE STRING,
WPTXT TYPE STRING,
PSTXT TYPE STRING,
IWERK TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
ANLZU TYPE STRING,
WPPOS TYPE STRING,
ERSDT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
KOSTL TYPE STRING,
ITEMNO TYPE STRING,
GEWRK TYPE STRING,
ARBPL TYPE STRING,
PPSID TYPE STRING,
PPAPL TYPE STRING,
SDATE TYPE STRING,
WDATE TYPE STRING,
CALL_TYPE TYPE STRING,
STICH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IWPPOS_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_IWPPOS_STR-EQUNR sy-vline 
WA_IWPPOS_STR-TPLNR sy-vline 
WA_IWPPOS_STR-BAUTL sy-vline 
WA_IWPPOS_STR-WARPL sy-vline 
WA_IWPPOS_STR-WAPOS sy-vline 
WA_IWPPOS_STR-WSTRA sy-vline 
WA_IWPPOS_STR-MITYP sy-vline 
WA_IWPPOS_STR-EQKTX sy-vline 
WA_IWPPOS_STR-PLTXT sy-vline 
WA_IWPPOS_STR-MAKTX sy-vline 
WA_IWPPOS_STR-WPTXT sy-vline 
WA_IWPPOS_STR-PSTXT sy-vline 
WA_IWPPOS_STR-IWERK sy-vline 
WA_IWPPOS_STR-PLNTY sy-vline 
WA_IWPPOS_STR-PLNNR sy-vline 
WA_IWPPOS_STR-PLNAL sy-vline 
WA_IWPPOS_STR-ANLZU sy-vline 
WA_IWPPOS_STR-WPPOS sy-vline 
WA_IWPPOS_STR-ERSDT sy-vline 
WA_IWPPOS_STR-ERNAM sy-vline 
WA_IWPPOS_STR-AEDAT sy-vline 
WA_IWPPOS_STR-AENAM sy-vline 
WA_IWPPOS_STR-KOSTL sy-vline 
WA_IWPPOS_STR-ITEMNO sy-vline 
WA_IWPPOS_STR-GEWRK sy-vline 
WA_IWPPOS_STR-ARBPL sy-vline 
WA_IWPPOS_STR-PPSID sy-vline 
WA_IWPPOS_STR-PPAPL sy-vline 
WA_IWPPOS_STR-SDATE sy-vline 
WA_IWPPOS_STR-WDATE sy-vline 
WA_IWPPOS_STR-CALL_TYPE sy-vline 
WA_IWPPOS_STR-STICH sy-vline      INTO ld_text SEPARATED BY SPACE.

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