ABAP Select data from SAP table WOSA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WOSA
*  INTO TABLE @DATA(IT_WOSA2).
*--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_WOSA INDEX 1 INTO DATA(WA_WOSA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WOSA>-MANDT = 1.
<WOSA>-UUID22 = 1.
<WOSA>-KUNNR = 1.
<WOSA>-EXAUFNR = 1.
<WOSA>-LIFNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WOSA-EKGRP, sy-vline,
  WA_WOSA-DISPO, sy-vline,
  WA_WOSA-BEDAT, sy-vline,
  WA_WOSA-EINDT, sy-vline,
  WA_WOSA-UZEIT, sy-vline,
  WA_WOSA-UNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WOSA 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_WOSA 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_WOSA INTO WA_WOSA.


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

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WOSA-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WOSA-LIFNR.
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_WOSA_STR, 
MANDT TYPE STRING,
UUID22 TYPE STRING,
KUNNR TYPE STRING,
EXAUFNR TYPE STRING,
LIFNR TYPE STRING,
EKGRP TYPE STRING,
DISPO TYPE STRING,
BEDAT TYPE STRING,
EINDT TYPE STRING,
UZEIT TYPE STRING,
UNAME TYPE STRING,
CALL_FROM TYPE STRING,
DATUM TYPE STRING,
WBTYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WOSA_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_WOSA_STR-MANDT sy-vline 
WA_WOSA_STR-UUID22 sy-vline 
WA_WOSA_STR-KUNNR sy-vline 
WA_WOSA_STR-EXAUFNR sy-vline 
WA_WOSA_STR-LIFNR sy-vline 
WA_WOSA_STR-EKGRP sy-vline 
WA_WOSA_STR-DISPO sy-vline 
WA_WOSA_STR-BEDAT sy-vline 
WA_WOSA_STR-EINDT sy-vline 
WA_WOSA_STR-UZEIT sy-vline 
WA_WOSA_STR-UNAME sy-vline 
WA_WOSA_STR-CALL_FROM sy-vline 
WA_WOSA_STR-DATUM sy-vline 
WA_WOSA_STR-WBTYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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