ABAP Select data from SAP table /SAPPSSRM/WEGT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPPSSRM/WEGT 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 /SAPPSSRM/WEGT. 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 /SAPPSSRM/WEGT 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_/SAPPSSRM/WEGT TYPE STANDARD TABLE OF /SAPPSSRM/WEGT,
      WA_/SAPPSSRM/WEGT TYPE /SAPPSSRM/WEGT,
      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: </SAPPSSRM/WEGT> TYPE /SAPPSSRM/WEGT.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPPSSRM/WEGT
  INTO TABLE IT_/SAPPSSRM/WEGT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPPSSRM/WEGT
*  INTO TABLE @DATA(IT_/SAPPSSRM/WEGT2).
*--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_/SAPPSSRM/WEGT INDEX 1 INTO DATA(WA_/SAPPSSRM/WEGT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPPSSRM/WEGT ASSIGNING </SAPPSSRM/WEGT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPPSSRM/WEGT>-CLIENT = 1.
</SAPPSSRM/WEGT>-GUID = 1.
</SAPPSSRM/WEGT>-SET_GUID = 1.
</SAPPSSRM/WEGT>-REF_FIELD_NAME = 1.
</SAPPSSRM/WEGT>-ATTR_GUID = 1.

ENDLOOP.

LOOP AT IT_/SAPPSSRM/WEGT INTO WA_/SAPPSSRM/WEGT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPPSSRM/WEGT-ACTIVE_SET_LINE, sy-vline,
  WA_/SAPPSSRM/WEGT-WEIGHT_FUNC, sy-vline,
  WA_/SAPPSSRM/WEGT-DEL_IND, sy-vline,
  WA_/SAPPSSRM/WEGT-ACTIVE, sy-vline,
  WA_/SAPPSSRM/WEGT-VALUE_INT1, sy-vline,
  WA_/SAPPSSRM/WEGT-VALUE_INT2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPPSSRM/WEGT 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_/SAPPSSRM/WEGT 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_/SAPPSSRM/WEGT INTO WA_/SAPPSSRM/WEGT.


*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 CUNIT, internal->external for field VALUE_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPPSSRM/WEGT-VALUE_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPPSSRM/WEGT-VALUE_UNIT.
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_/SAPPSSRM/WEGT_STR, 
CLIENT TYPE STRING,
GUID TYPE STRING,
SET_GUID TYPE STRING,
REF_FIELD_NAME TYPE STRING,
ATTR_GUID TYPE STRING,
ACTIVE_SET_LINE TYPE STRING,
WEIGHT_FUNC TYPE STRING,
DEL_IND TYPE STRING,
ACTIVE TYPE STRING,
VALUE_INT1 TYPE STRING,
VALUE_INT2 TYPE STRING,
VALUE_DATE1 TYPE STRING,
VALUE_DATE2 TYPE STRING,
VALUE_TIME1 TYPE STRING,
VALUE_TIME2 TYPE STRING,
VALUE_TSTAMP1 TYPE STRING,
VALUE_TSTAMP2 TYPE STRING,
VALUE_QUAN1 TYPE STRING,
VALUE_QUAN2 TYPE STRING,
VALUE_AMOUNT1 TYPE STRING,
VALUE_AMOUNT2 TYPE STRING,
VALUE_TEXT1 TYPE STRING,
VALUE_TEXT2 TYPE STRING,
FUNC_RESULT1 TYPE STRING,
FUNC_RESULT2 TYPE STRING,
WEIGHT_FACTOR TYPE STRING,
VALUE_UNIT TYPE STRING,
VALUE_CURR TYPE STRING,
FIX_MULTI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPPSSRM/WEGT_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_/SAPPSSRM/WEGT_STR-CLIENT sy-vline 
WA_/SAPPSSRM/WEGT_STR-GUID sy-vline 
WA_/SAPPSSRM/WEGT_STR-SET_GUID sy-vline 
WA_/SAPPSSRM/WEGT_STR-REF_FIELD_NAME sy-vline 
WA_/SAPPSSRM/WEGT_STR-ATTR_GUID sy-vline 
WA_/SAPPSSRM/WEGT_STR-ACTIVE_SET_LINE sy-vline 
WA_/SAPPSSRM/WEGT_STR-WEIGHT_FUNC sy-vline 
WA_/SAPPSSRM/WEGT_STR-DEL_IND sy-vline 
WA_/SAPPSSRM/WEGT_STR-ACTIVE sy-vline 
WA_/SAPPSSRM/WEGT_STR-VALUE_INT1 sy-vline 
WA_/SAPPSSRM/WEGT_STR-VALUE_INT2 sy-vline 
WA_/SAPPSSRM/WEGT_STR-VALUE_DATE1 sy-vline 
WA_/SAPPSSRM/WEGT_STR-VALUE_DATE2 sy-vline 
WA_/SAPPSSRM/WEGT_STR-VALUE_TIME1 sy-vline 
WA_/SAPPSSRM/WEGT_STR-VALUE_TIME2 sy-vline 
WA_/SAPPSSRM/WEGT_STR-VALUE_TSTAMP1 sy-vline 
WA_/SAPPSSRM/WEGT_STR-VALUE_TSTAMP2 sy-vline 
WA_/SAPPSSRM/WEGT_STR-VALUE_QUAN1 sy-vline 
WA_/SAPPSSRM/WEGT_STR-VALUE_QUAN2 sy-vline 
WA_/SAPPSSRM/WEGT_STR-VALUE_AMOUNT1 sy-vline 
WA_/SAPPSSRM/WEGT_STR-VALUE_AMOUNT2 sy-vline 
WA_/SAPPSSRM/WEGT_STR-VALUE_TEXT1 sy-vline 
WA_/SAPPSSRM/WEGT_STR-VALUE_TEXT2 sy-vline 
WA_/SAPPSSRM/WEGT_STR-FUNC_RESULT1 sy-vline 
WA_/SAPPSSRM/WEGT_STR-FUNC_RESULT2 sy-vline 
WA_/SAPPSSRM/WEGT_STR-WEIGHT_FACTOR sy-vline 
WA_/SAPPSSRM/WEGT_STR-VALUE_UNIT sy-vline 
WA_/SAPPSSRM/WEGT_STR-VALUE_CURR sy-vline 
WA_/SAPPSSRM/WEGT_STR-FIX_MULTI sy-vline      INTO ld_text SEPARATED BY SPACE.

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