ABAP Select data from SAP table WSSB_RFC_ITEM_READ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WSSB_RFC_ITEM_READ
*  INTO TABLE @DATA(IT_WSSB_RFC_ITEM_READ2).
*--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_WSSB_RFC_ITEM_READ INDEX 1 INTO DATA(WA_WSSB_RFC_ITEM_READ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WSSB_RFC_ITEM_READ>-BILLINGDOC = 1.
<WSSB_RFC_ITEM_READ>-ITEM_NUMBER = 1.
<WSSB_RFC_ITEM_READ>-HG_LV_ITEM = 1.
<WSSB_RFC_ITEM_READ>-INV_QTY = 1.
<WSSB_RFC_ITEM_READ>-SALES_UNIT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WSSB_RFC_ITEM_READ-SALES_UNIT_ISO, sy-vline,
  WA_WSSB_RFC_ITEM_READ-NETVAL_INV, sy-vline,
  WA_WSSB_RFC_ITEM_READ-REF_DOC_NUMBER, sy-vline,
  WA_WSSB_RFC_ITEM_READ-REF_DOC_ITEM, sy-vline,
  WA_WSSB_RFC_ITEM_READ-REF_DOC_CAT, sy-vline,
  WA_WSSB_RFC_ITEM_READ-SD_DOC_NUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WSSB_RFC_ITEM_READ 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_WSSB_RFC_ITEM_READ 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_WSSB_RFC_ITEM_READ INTO WA_WSSB_RFC_ITEM_READ.


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

*Conversion exit CUNIT, internal->external for field SALES_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WSSB_RFC_ITEM_READ-SALES_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WSSB_RFC_ITEM_READ-SALES_UNIT.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit EAN11, internal->external for field EAN_UPC
CALL FUNCTION 'CONVERSION_EXIT_EAN11_OUTPUT'
  EXPORTING
    input =                      WA_WSSB_RFC_ITEM_READ-EAN_UPC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WSSB_RFC_ITEM_READ-EAN_UPC.
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_WSSB_RFC_ITEM_READ_STR, 
BILLINGDOC TYPE STRING,
ITEM_NUMBER TYPE STRING,
HG_LV_ITEM TYPE STRING,
INV_QTY TYPE STRING,
SALES_UNIT TYPE STRING,
SALES_UNIT_ISO TYPE STRING,
NETVAL_INV TYPE STRING,
REF_DOC_NUMBER TYPE STRING,
REF_DOC_ITEM TYPE STRING,
REF_DOC_CAT TYPE STRING,
SD_DOC_NUMBER TYPE STRING,
SD_DOC_ITEM TYPE STRING,
SD_DOC_CAT TYPE STRING,
MATERIAL TYPE STRING,
SHORT_TEXT TYPE STRING,
ITEM_TYPE TYPE STRING,
ITEM_CATEG TYPE STRING,
DIVISION TYPE STRING,
PLANT TYPE STRING,
CASH_DISC TYPE STRING,
CSHDISCBAS TYPE STRING,
RETURNS TYPE STRING,
EAN_UPC TYPE STRING,
TAXJURCODE TYPE STRING,
TAX_AMOUNT TYPE STRING,
BRVAL_INV TYPE STRING,
STVAL_INV TYPE STRING,
DP_CLEARED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WSSB_RFC_ITEM_READ_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_WSSB_RFC_ITEM_READ_STR-BILLINGDOC sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-ITEM_NUMBER sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-HG_LV_ITEM sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-INV_QTY sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-SALES_UNIT sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-SALES_UNIT_ISO sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-NETVAL_INV sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-REF_DOC_NUMBER sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-REF_DOC_ITEM sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-REF_DOC_CAT sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-SD_DOC_NUMBER sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-SD_DOC_ITEM sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-SD_DOC_CAT sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-MATERIAL sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-SHORT_TEXT sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-ITEM_TYPE sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-ITEM_CATEG sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-DIVISION sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-PLANT sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-CASH_DISC sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-CSHDISCBAS sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-RETURNS sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-EAN_UPC sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-TAXJURCODE sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-TAX_AMOUNT sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-BRVAL_INV sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-STVAL_INV sy-vline 
WA_WSSB_RFC_ITEM_READ_STR-DP_CLEARED sy-vline      INTO ld_text SEPARATED BY SPACE.

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