ABAP Select data from SAP table WRF_WRSZ_S into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WRF_WRSZ_S
*  INTO TABLE @DATA(IT_WRF_WRSZ_S2).
*--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_WRF_WRSZ_S INDEX 1 INTO DATA(WA_WRF_WRSZ_S2).


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

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

ENDLOOP.

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

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


*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_WRF_WRSZ_S-ASORT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_WRSZ_S-ASORT.
WRITE:/ 'New Value:', ld_input.

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

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

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