ABAP Select data from SAP table NWOMS_46C_DEVICE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP NWOMS_46C_DEVICE 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 NWOMS_46C_DEVICE. 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 NWOMS_46C_DEVICE 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_NWOMS_46C_DEVICE TYPE STANDARD TABLE OF NWOMS_46C_DEVICE,
      WA_NWOMS_46C_DEVICE TYPE NWOMS_46C_DEVICE,
      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: <NWOMS_46C_DEVICE> TYPE NWOMS_46C_DEVICE.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_NWOMS_46C_DEVICE.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM NWOMS_46C_DEVICE
  INTO TABLE IT_NWOMS_46C_DEVICE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM NWOMS_46C_DEVICE
*  INTO TABLE @DATA(IT_NWOMS_46C_DEVICE2).
*--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_NWOMS_46C_DEVICE INDEX 1 INTO DATA(WA_NWOMS_46C_DEVICE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_NWOMS_46C_DEVICE ASSIGNING <NWOMS_46C_DEVICE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<NWOMS_46C_DEVICE>-DEVICE_NAM = 1.
<NWOMS_46C_DEVICE>-TRAY_INFO = 1.
<NWOMS_46C_DEVICE>-TRAYBITS = 1.
<NWOMS_46C_DEVICE>-TRAY1 = 1.
<NWOMS_46C_DEVICE>-TRAY2 = 1.

ENDLOOP.

LOOP AT IT_NWOMS_46C_DEVICE INTO WA_NWOMS_46C_DEVICE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_NWOMS_46C_DEVICE-TRAY3, sy-vline,
  WA_NWOMS_46C_DEVICE-TRAY4, sy-vline,
  WA_NWOMS_46C_DEVICE-TRAY5, sy-vline,
  WA_NWOMS_46C_DEVICE-TRAY6, sy-vline,
  WA_NWOMS_46C_DEVICE-TRAY7, sy-vline,
  WA_NWOMS_46C_DEVICE-TRAY8, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_NWOMS_46C_DEVICE 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_NWOMS_46C_DEVICE 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_NWOMS_46C_DEVICE INTO WA_NWOMS_46C_DEVICE.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_NWOMS_46C_DEVICE_STR, 
DEVICE_NAM TYPE STRING,
TRAY_INFO TYPE STRING,
TRAYBITS TYPE STRING,
TRAY1 TYPE STRING,
TRAY2 TYPE STRING,
TRAY3 TYPE STRING,
TRAY4 TYPE STRING,
TRAY5 TYPE STRING,
TRAY6 TYPE STRING,
TRAY7 TYPE STRING,
TRAY8 TYPE STRING,
TRAY9 TYPE STRING,
TRAY10 TYPE STRING,
TRAYMANU TYPE STRING,
TRAYENV TYPE STRING,
TRAYMANENV TYPE STRING,
DEVICE_TYP TYPE STRING,
SHORT_TEXT TYPE STRING,
DEVICE_CLS TYPE STRING,
MODEL TYPE STRING,
LOCATION TYPE STRING,
MESSAGE TYPE STRING,
A_GROUP TYPE STRING,
LOCK_PRT TYPE STRING,
HOST_PRT TYPE STRING,
COVER_P TYPE STRING,
COVER_PL TYPE STRING,
HCOVER_P TYPE STRING,
MONITOR TYPE STRING,
P_SEQ TYPE STRING,
HORZ_MOVE TYPE STRING,
H_MOVE_U TYPE STRING,
VERT_MOVE TYPE STRING,
V_MOVE_U TYPE STRING,
COLOR_PRT TYPE STRING,
PRINT_MODE TYPE STRING,
PAPER_TRAY TYPE STRING,
UNUSED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_NWOMS_46C_DEVICE_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_NWOMS_46C_DEVICE_STR-DEVICE_NAM sy-vline 
WA_NWOMS_46C_DEVICE_STR-TRAY_INFO sy-vline 
WA_NWOMS_46C_DEVICE_STR-TRAYBITS sy-vline 
WA_NWOMS_46C_DEVICE_STR-TRAY1 sy-vline 
WA_NWOMS_46C_DEVICE_STR-TRAY2 sy-vline 
WA_NWOMS_46C_DEVICE_STR-TRAY3 sy-vline 
WA_NWOMS_46C_DEVICE_STR-TRAY4 sy-vline 
WA_NWOMS_46C_DEVICE_STR-TRAY5 sy-vline 
WA_NWOMS_46C_DEVICE_STR-TRAY6 sy-vline 
WA_NWOMS_46C_DEVICE_STR-TRAY7 sy-vline 
WA_NWOMS_46C_DEVICE_STR-TRAY8 sy-vline 
WA_NWOMS_46C_DEVICE_STR-TRAY9 sy-vline 
WA_NWOMS_46C_DEVICE_STR-TRAY10 sy-vline 
WA_NWOMS_46C_DEVICE_STR-TRAYMANU sy-vline 
WA_NWOMS_46C_DEVICE_STR-TRAYENV sy-vline 
WA_NWOMS_46C_DEVICE_STR-TRAYMANENV sy-vline 
WA_NWOMS_46C_DEVICE_STR-DEVICE_TYP sy-vline 
WA_NWOMS_46C_DEVICE_STR-SHORT_TEXT sy-vline 
WA_NWOMS_46C_DEVICE_STR-DEVICE_CLS sy-vline 
WA_NWOMS_46C_DEVICE_STR-MODEL sy-vline 
WA_NWOMS_46C_DEVICE_STR-LOCATION sy-vline 
WA_NWOMS_46C_DEVICE_STR-MESSAGE sy-vline 
WA_NWOMS_46C_DEVICE_STR-A_GROUP sy-vline 
WA_NWOMS_46C_DEVICE_STR-LOCK_PRT sy-vline 
WA_NWOMS_46C_DEVICE_STR-HOST_PRT sy-vline 
WA_NWOMS_46C_DEVICE_STR-COVER_P sy-vline 
WA_NWOMS_46C_DEVICE_STR-COVER_PL sy-vline 
WA_NWOMS_46C_DEVICE_STR-HCOVER_P sy-vline 
WA_NWOMS_46C_DEVICE_STR-MONITOR sy-vline 
WA_NWOMS_46C_DEVICE_STR-P_SEQ sy-vline 
WA_NWOMS_46C_DEVICE_STR-HORZ_MOVE sy-vline 
WA_NWOMS_46C_DEVICE_STR-H_MOVE_U sy-vline 
WA_NWOMS_46C_DEVICE_STR-VERT_MOVE sy-vline 
WA_NWOMS_46C_DEVICE_STR-V_MOVE_U sy-vline 
WA_NWOMS_46C_DEVICE_STR-COLOR_PRT sy-vline 
WA_NWOMS_46C_DEVICE_STR-PRINT_MODE sy-vline 
WA_NWOMS_46C_DEVICE_STR-PAPER_TRAY sy-vline 
WA_NWOMS_46C_DEVICE_STR-UNUSED sy-vline      INTO ld_text SEPARATED BY SPACE.

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