ABAP Select data from SAP table WSGM_RFC_GR_DOC_ITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WSGM_RFC_GR_DOC_ITEM
*  INTO TABLE @DATA(IT_WSGM_RFC_GR_DOC_ITEM2).
*--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_WSGM_RFC_GR_DOC_ITEM INDEX 1 INTO DATA(WA_WSGM_RFC_GR_DOC_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WSGM_RFC_GR_DOC_ITEM>-ITM_NUMBER = 1.
<WSGM_RFC_GR_DOC_ITEM>-MATERIAL = 1.
<WSGM_RFC_GR_DOC_ITEM>-EAN_UPC = 1.
<WSGM_RFC_GR_DOC_ITEM>-VENDOR_MATNR = 1.
<WSGM_RFC_GR_DOC_ITEM>-ARTICLE_TEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WSGM_RFC_GR_DOC_ITEM-ITEM_TEXT, sy-vline,
  WA_WSGM_RFC_GR_DOC_ITEM-REF_QUANTITY, sy-vline,
  WA_WSGM_RFC_GR_DOC_ITEM-REF_QTY_UNIT, sy-vline,
  WA_WSGM_RFC_GR_DOC_ITEM-GR_REMAIN_QTY, sy-vline,
  WA_WSGM_RFC_GR_DOC_ITEM-GR_REMAIN_QTY_UNIT, sy-vline,
  WA_WSGM_RFC_GR_DOC_ITEM-ENTRY_QUANTITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WSGM_RFC_GR_DOC_ITEM 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_WSGM_RFC_GR_DOC_ITEM 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_WSGM_RFC_GR_DOC_ITEM INTO WA_WSGM_RFC_GR_DOC_ITEM.


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

*Conversion exit EAN11, internal->external for field EAN_UPC
CALL FUNCTION 'CONVERSION_EXIT_EAN11_OUTPUT'
  EXPORTING
    input =                      WA_WSGM_RFC_GR_DOC_ITEM-EAN_UPC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WSGM_RFC_GR_DOC_ITEM-EAN_UPC.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field GL_ACCOUNT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WSGM_RFC_GR_DOC_ITEM-GL_ACCOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WSGM_RFC_GR_DOC_ITEM-GL_ACCOUNT.
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_WSGM_RFC_GR_DOC_ITEM_STR, 
ITM_NUMBER TYPE STRING,
MATERIAL TYPE STRING,
EAN_UPC TYPE STRING,
VENDOR_MATNR TYPE STRING,
ARTICLE_TEXT TYPE STRING,
ITEM_TEXT TYPE STRING,
REF_QUANTITY TYPE STRING,
REF_QTY_UNIT TYPE STRING,
GR_REMAIN_QTY TYPE STRING,
GR_REMAIN_QTY_UNIT TYPE STRING,
ENTRY_QUANTITY TYPE STRING,
ENTRY_QTY_UNIT TYPE STRING,
ENTRY_NO_MORE_GR TYPE STRING,
BATCH TYPE STRING,
EXPIRY_DATE TYPE STRING,
PROD_DATE TYPE STRING,
RETURN_ITEM TYPE STRING,
STORAGE_LOCATION TYPE STRING,
MOVEMENT_REASON TYPE STRING,
COSTCENTER TYPE STRING,
GL_ACCOUNT TYPE STRING,
GL_ACC_COUNTER TYPE STRING,
SALES_VAL_EXT TYPE STRING,
CURRENCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WSGM_RFC_GR_DOC_ITEM_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_WSGM_RFC_GR_DOC_ITEM_STR-ITM_NUMBER sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-MATERIAL sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-EAN_UPC sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-VENDOR_MATNR sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-ARTICLE_TEXT sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-ITEM_TEXT sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-REF_QUANTITY sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-REF_QTY_UNIT sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-GR_REMAIN_QTY sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-GR_REMAIN_QTY_UNIT sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-ENTRY_QUANTITY sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-ENTRY_QTY_UNIT sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-ENTRY_NO_MORE_GR sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-BATCH sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-EXPIRY_DATE sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-PROD_DATE sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-RETURN_ITEM sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-STORAGE_LOCATION sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-MOVEMENT_REASON sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-COSTCENTER sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-GL_ACCOUNT sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-GL_ACC_COUNTER sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-SALES_VAL_EXT sy-vline 
WA_WSGM_RFC_GR_DOC_ITEM_STR-CURRENCY sy-vline      INTO ld_text SEPARATED BY SPACE.

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