ABAP Select data from SAP table WOSB_POSLIST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WOSB_POSLIST
*  INTO TABLE @DATA(IT_WOSB_POSLIST2).
*--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_WOSB_POSLIST INDEX 1 INTO DATA(WA_WOSB_POSLIST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WOSB_POSLIST>-ALLOC_TBL_ITEM = 1.
<WOSB_POSLIST>-MATERIAL = 1.
<WOSB_POSLIST>-MATL_DESC = 1.
<WOSB_POSLIST>-REQUESTED_QTY = 1.
<WOSB_POSLIST>-CONFIRMED_QTY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WOSB_POSLIST-PLANNED_QTY, sy-vline,
  WA_WOSB_POSLIST-ALLOC_UNIT, sy-vline,
  WA_WOSB_POSLIST-WEFDB, sy-vline,
  WA_WOSB_POSLIST-RET_ITEM, sy-vline,
  WA_WOSB_POSLIST-REPLY_ALLOWED, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_WOSB_POSLIST 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_WOSB_POSLIST 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_WOSB_POSLIST INTO WA_WOSB_POSLIST.


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

*Conversion exit CUNIT, internal->external for field ALLOC_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WOSB_POSLIST-ALLOC_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WOSB_POSLIST-ALLOC_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_WOSB_POSLIST_STR, 
ALLOC_TBL_ITEM TYPE STRING,
MATERIAL TYPE STRING,
MATL_DESC TYPE STRING,
REQUESTED_QTY TYPE STRING,
CONFIRMED_QTY TYPE STRING,
PLANNED_QTY TYPE STRING,
ALLOC_UNIT TYPE STRING,
WEFDB TYPE STRING,
RET_ITEM TYPE STRING,
REPLY_ALLOWED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WOSB_POSLIST_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_WOSB_POSLIST_STR-ALLOC_TBL_ITEM sy-vline 
WA_WOSB_POSLIST_STR-MATERIAL sy-vline 
WA_WOSB_POSLIST_STR-MATL_DESC sy-vline 
WA_WOSB_POSLIST_STR-REQUESTED_QTY sy-vline 
WA_WOSB_POSLIST_STR-CONFIRMED_QTY sy-vline 
WA_WOSB_POSLIST_STR-PLANNED_QTY sy-vline 
WA_WOSB_POSLIST_STR-ALLOC_UNIT sy-vline 
WA_WOSB_POSLIST_STR-WEFDB sy-vline 
WA_WOSB_POSLIST_STR-RET_ITEM sy-vline 
WA_WOSB_POSLIST_STR-REPLY_ALLOWED sy-vline      INTO ld_text SEPARATED BY SPACE.

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