ABAP Select data from SAP table GSS_RFIDMXCTOP_LIST1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP GSS_RFIDMXCTOP_LIST1 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 GSS_RFIDMXCTOP_LIST1. 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 GSS_RFIDMXCTOP_LIST1 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_GSS_RFIDMXCTOP_LIST1 TYPE STANDARD TABLE OF GSS_RFIDMXCTOP_LIST1,
      WA_GSS_RFIDMXCTOP_LIST1 TYPE GSS_RFIDMXCTOP_LIST1,
      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: <GSS_RFIDMXCTOP_LIST1> TYPE GSS_RFIDMXCTOP_LIST1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_GSS_RFIDMXCTOP_LIST1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM GSS_RFIDMXCTOP_LIST1
  INTO TABLE IT_GSS_RFIDMXCTOP_LIST1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GSS_RFIDMXCTOP_LIST1
*  INTO TABLE @DATA(IT_GSS_RFIDMXCTOP_LIST12).
*--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_GSS_RFIDMXCTOP_LIST1 INDEX 1 INTO DATA(WA_GSS_RFIDMXCTOP_LIST12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_GSS_RFIDMXCTOP_LIST1 ASSIGNING <GSS_RFIDMXCTOP_LIST1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GSS_RFIDMXCTOP_LIST1>-G_COUNT = 1.
<GSS_RFIDMXCTOP_LIST1>-STCD1 = 1.
<GSS_RFIDMXCTOP_LIST1>-STCD3 = 1.
<GSS_RFIDMXCTOP_LIST1>-NAME1 = 1.
<GSS_RFIDMXCTOP_LIST1>-NAME2 = 1.

ENDLOOP.

LOOP AT IT_GSS_RFIDMXCTOP_LIST1 INTO WA_GSS_RFIDMXCTOP_LIST1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GSS_RFIDMXCTOP_LIST1-U_NET, sy-vline,
  WA_GSS_RFIDMXCTOP_LIST1-STCD2, sy-vline,
  WA_GSS_RFIDMXCTOP_LIST1-STRAS, sy-vline,
  WA_GSS_RFIDMXCTOP_LIST1-ORT02, sy-vline,
  WA_GSS_RFIDMXCTOP_LIST1-PSTLZ, sy-vline,
  WA_GSS_RFIDMXCTOP_LIST1-ORT01, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GSS_RFIDMXCTOP_LIST1 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_GSS_RFIDMXCTOP_LIST1 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_GSS_RFIDMXCTOP_LIST1 INTO WA_GSS_RFIDMXCTOP_LIST1.


*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 KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GSS_RFIDMXCTOP_LIST1-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GSS_RFIDMXCTOP_LIST1-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_GSS_RFIDMXCTOP_LIST1_STR, 
G_COUNT TYPE STRING,
STCD1 TYPE STRING,
STCD3 TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
U_NET TYPE STRING,
STCD2 TYPE STRING,
STRAS TYPE STRING,
ORT02 TYPE STRING,
PSTLZ TYPE STRING,
ORT01 TYPE STRING,
BEZEI TYPE STRING,
TELF1 TYPE STRING,
KUNNR TYPE STRING,
UMSATZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GSS_RFIDMXCTOP_LIST1_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_GSS_RFIDMXCTOP_LIST1_STR-G_COUNT sy-vline 
WA_GSS_RFIDMXCTOP_LIST1_STR-STCD1 sy-vline 
WA_GSS_RFIDMXCTOP_LIST1_STR-STCD3 sy-vline 
WA_GSS_RFIDMXCTOP_LIST1_STR-NAME1 sy-vline 
WA_GSS_RFIDMXCTOP_LIST1_STR-NAME2 sy-vline 
WA_GSS_RFIDMXCTOP_LIST1_STR-U_NET sy-vline 
WA_GSS_RFIDMXCTOP_LIST1_STR-STCD2 sy-vline 
WA_GSS_RFIDMXCTOP_LIST1_STR-STRAS sy-vline 
WA_GSS_RFIDMXCTOP_LIST1_STR-ORT02 sy-vline 
WA_GSS_RFIDMXCTOP_LIST1_STR-PSTLZ sy-vline 
WA_GSS_RFIDMXCTOP_LIST1_STR-ORT01 sy-vline 
WA_GSS_RFIDMXCTOP_LIST1_STR-BEZEI sy-vline 
WA_GSS_RFIDMXCTOP_LIST1_STR-TELF1 sy-vline 
WA_GSS_RFIDMXCTOP_LIST1_STR-KUNNR sy-vline 
WA_GSS_RFIDMXCTOP_LIST1_STR-UMSATZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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