ABAP Select data from SAP table WRSZ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WRSZ
*  INTO TABLE @DATA(IT_WRSZ2).
*--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_WRSZ INDEX 1 INTO DATA(WA_WRSZ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WRSZ>-MANDT = 1.
<WRSZ>-ASORT = 1.
<WRSZ>-LFDNR = 1.
<WRSZ>-LOCNR = 1.
<WRSZ>-KUNNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WRSZ-VKORG, sy-vline,
  WA_WRSZ-VTWEG, sy-vline,
  WA_WRSZ-SPART, sy-vline,
  WA_WRSZ-SONUT, sy-vline,
  WA_WRSZ-DATAB, sy-vline,
  WA_WRSZ-DATBI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WRSZ 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_WRSZ 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_WRSZ INTO WA_WRSZ.


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

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

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WRSZ-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRSZ-KUNNR.
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_WRSZ_STR, 
MANDT TYPE STRING,
ASORT TYPE STRING,
LFDNR TYPE STRING,
LOCNR TYPE STRING,
KUNNR TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
SONUT TYPE STRING,
DATAB TYPE STRING,
DATBI TYPE STRING,
RANGF TYPE STRING,
LIGRD TYPE STRING,
ERNAM TYPE STRING,
ERZET TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
AEZET TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WRSZ_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_WRSZ_STR-MANDT sy-vline 
WA_WRSZ_STR-ASORT sy-vline 
WA_WRSZ_STR-LFDNR sy-vline 
WA_WRSZ_STR-LOCNR sy-vline 
WA_WRSZ_STR-KUNNR sy-vline 
WA_WRSZ_STR-VKORG sy-vline 
WA_WRSZ_STR-VTWEG sy-vline 
WA_WRSZ_STR-SPART sy-vline 
WA_WRSZ_STR-SONUT sy-vline 
WA_WRSZ_STR-DATAB sy-vline 
WA_WRSZ_STR-DATBI sy-vline 
WA_WRSZ_STR-RANGF sy-vline 
WA_WRSZ_STR-LIGRD sy-vline 
WA_WRSZ_STR-ERNAM sy-vline 
WA_WRSZ_STR-ERZET sy-vline 
WA_WRSZ_STR-AENAM sy-vline 
WA_WRSZ_STR-AEDAT sy-vline 
WA_WRSZ_STR-AEZET sy-vline      INTO ld_text SEPARATED BY SPACE.

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