ABAP Select data from SAP table WOSI_CUST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WOSI_CUST
*  INTO TABLE @DATA(IT_WOSI_CUST2).
*--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_WOSI_CUST INDEX 1 INTO DATA(WA_WOSI_CUST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WOSI_CUST>-ABWEI_AUF = 1.
<WOSI_CUST>-SWERT_AUF = 1.
<WOSI_CUST>-INVNU_SEL = 1.
<WOSI_CUST>-GRUND_AUF = 1.
<WOSI_CUST>-USE_POSWS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WOSI_CUST-MATNR_SHOW, sy-vline,
  WA_WOSI_CUST-MAKTX_SHOW, sy-vline,
  WA_WOSI_CUST-CHANGE_POS_MATNR, sy-vline,
  WA_WOSI_CUST-SHOW_FIRST_DOC, sy-vline,
  WA_WOSI_CUST-SHOW_MI05_SEP, sy-vline,
  WA_WOSI_CUST-MI04_ACTIV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WOSI_CUST 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_WOSI_CUST 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_WOSI_CUST INTO WA_WOSI_CUST.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_WOSI_CUST_STR, 
ABWEI_AUF TYPE STRING,
SWERT_AUF TYPE STRING,
INVNU_SEL TYPE STRING,
GRUND_AUF TYPE STRING,
USE_POSWS TYPE STRING,
MATNR_SHOW TYPE STRING,
MAKTX_SHOW TYPE STRING,
CHANGE_POS_MATNR TYPE STRING,
SHOW_FIRST_DOC TYPE STRING,
SHOW_MI05_SEP TYPE STRING,
MI04_ACTIV TYPE STRING,
MI05_ACTIV TYPE STRING,
MI07_ACTIV TYPE STRING,
POS_SEL_ACTIV TYPE STRING,
HIDE_500 TYPE STRING,
SET_XNULL_ACTIV TYPE STRING,
MDE_ACTIV TYPE STRING,
LISTE_ANFORDERN_ACTIV TYPE STRING,
UMBEW_BUCHEN_ACTIV TYPE STRING,
SORT_ACTIV TYPE STRING,
DETAIL_ACTIV TYPE STRING,
DRUCKEN_ACTIV TYPE STRING,
ERRORLIST_ACTIV TYPE STRING,
XPDC_WITH_REF TYPE STRING,
WSTI_OPEN_STORE TYPE STRING,
WSTI_USE_APPLET TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WOSI_CUST_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_WOSI_CUST_STR-ABWEI_AUF sy-vline 
WA_WOSI_CUST_STR-SWERT_AUF sy-vline 
WA_WOSI_CUST_STR-INVNU_SEL sy-vline 
WA_WOSI_CUST_STR-GRUND_AUF sy-vline 
WA_WOSI_CUST_STR-USE_POSWS sy-vline 
WA_WOSI_CUST_STR-MATNR_SHOW sy-vline 
WA_WOSI_CUST_STR-MAKTX_SHOW sy-vline 
WA_WOSI_CUST_STR-CHANGE_POS_MATNR sy-vline 
WA_WOSI_CUST_STR-SHOW_FIRST_DOC sy-vline 
WA_WOSI_CUST_STR-SHOW_MI05_SEP sy-vline 
WA_WOSI_CUST_STR-MI04_ACTIV sy-vline 
WA_WOSI_CUST_STR-MI05_ACTIV sy-vline 
WA_WOSI_CUST_STR-MI07_ACTIV sy-vline 
WA_WOSI_CUST_STR-POS_SEL_ACTIV sy-vline 
WA_WOSI_CUST_STR-HIDE_500 sy-vline 
WA_WOSI_CUST_STR-SET_XNULL_ACTIV sy-vline 
WA_WOSI_CUST_STR-MDE_ACTIV sy-vline 
WA_WOSI_CUST_STR-LISTE_ANFORDERN_ACTIV sy-vline 
WA_WOSI_CUST_STR-UMBEW_BUCHEN_ACTIV sy-vline 
WA_WOSI_CUST_STR-SORT_ACTIV sy-vline 
WA_WOSI_CUST_STR-DETAIL_ACTIV sy-vline 
WA_WOSI_CUST_STR-DRUCKEN_ACTIV sy-vline 
WA_WOSI_CUST_STR-ERRORLIST_ACTIV sy-vline 
WA_WOSI_CUST_STR-XPDC_WITH_REF sy-vline 
WA_WOSI_CUST_STR-WSTI_OPEN_STORE sy-vline 
WA_WOSI_CUST_STR-WSTI_USE_APPLET sy-vline      INTO ld_text SEPARATED BY SPACE.

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