ABAP Select data from SAP table RCGCOMWIOT into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RCGCOMWIOT 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 RCGCOMWIOT. 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 RCGCOMWIOT 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_RCGCOMWIOT TYPE STANDARD TABLE OF RCGCOMWIOT,
      WA_RCGCOMWIOT TYPE RCGCOMWIOT,
      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: <RCGCOMWIOT> TYPE RCGCOMWIOT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGCOMWIOT
*  INTO TABLE @DATA(IT_RCGCOMWIOT2).
*--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_RCGCOMWIOT INDEX 1 INTO DATA(WA_RCGCOMWIOT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGCOMWIOT>-ESTCAT = 1.
<RCGCOMWIOT>-ESTNAM = 1.
<RCGCOMWIOT>-CLINT = 1.
<RCGCOMWIOT>-KLART = 1.
<RCGCOMWIOT>-CLASS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGCOMWIOT-KLAGR, sy-vline,
  WA_RCGCOMWIOT-BGRSE, sy-vline,
  WA_RCGCOMWIOT-BGRKL, sy-vline,
  WA_RCGCOMWIOT-BGRKP, sy-vline,
  WA_RCGCOMWIOT-ANAME, sy-vline,
  WA_RCGCOMWIOT-ADATU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGCOMWIOT 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_RCGCOMWIOT 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_RCGCOMWIOT INTO WA_RCGCOMWIOT.


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

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

*Conversion exit ATINN, internal->external for field ATINN
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_RCGCOMWIOT-ATINN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGCOMWIOT-ATINN.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field ATAW1
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RCGCOMWIOT-ATAW1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGCOMWIOT-ATAW1.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ATINN, internal->external for field ATIMB
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_RCGCOMWIOT-ATIMB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGCOMWIOT-ATIMB.
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_RCGCOMWIOT_STR, 
ESTCAT TYPE STRING,
ESTNAM TYPE STRING,
CLINT TYPE STRING,
KLART TYPE STRING,
CLASS TYPE STRING,
KLAGR TYPE STRING,
BGRSE TYPE STRING,
BGRKL TYPE STRING,
BGRKP TYPE STRING,
ANAME TYPE STRING,
ADATU TYPE STRING,
VNAME TYPE STRING,
VDATU TYPE STRING,
VONDT TYPE STRING,
BISDT TYPE STRING,
ANZUO TYPE STRING,
PRAUS TYPE STRING,
SICHT TYPE STRING,
DOKNR TYPE STRING,
DOKAR TYPE STRING,
DOKTL TYPE STRING,
DOKVR TYPE STRING,
DINKZ TYPE STRING,
NNORM TYPE STRING,
NORMN TYPE STRING,
NORMB TYPE STRING,
NRMT1 TYPE STRING,
NRMT2 TYPE STRING,
AUSGD TYPE STRING,
VERSD TYPE STRING,
VERSI TYPE STRING,
LEIST TYPE STRING,
VERWE TYPE STRING,
SPART TYPE STRING,
LREF3 TYPE STRING,
WWSKZ TYPE STRING,
WWSSI TYPE STRING,
POTPR TYPE STRING,
CLOBK TYPE STRING,
CLMUL TYPE STRING,
CVIEW TYPE STRING,
DISST TYPE STRING,
MEINS TYPE STRING,
CLMOD TYPE STRING,
VWSTL TYPE STRING,
VWPLA TYPE STRING,
CLALT TYPE STRING,
LBREI TYPE STRING,
BNAME TYPE STRING,
MAXBL TYPE STRING,
KNOBJ TYPE STRING,
LOCLA TYPE STRING,
ATNAM TYPE STRING,
FLG_IS_PHR TYPE STRING,
ATINN TYPE STRING,
ATZHL TYPE STRING,
ATWRT TYPE STRING,
ATFLV TYPE STRING,
ATAWE TYPE STRING,
ATFLB TYPE STRING,
ATAW1 TYPE STRING,
ATCOD TYPE STRING,
ATTLV TYPE STRING,
ATTLB TYPE STRING,
ATPRZ TYPE STRING,
ATINC TYPE STRING,
ATAUT TYPE STRING,
STATU TYPE STRING,
ATFOR TYPE STRING,
SLWRT TYPE STRING,
SLFLV TYPE STRING,
SLFLB TYPE STRING,
SLCOD TYPE STRING,
ATTAB TYPE STRING,
ATFEL TYPE STRING,
KZRED TYPE STRING,
OMADD TYPE STRING,
MMERB TYPE STRING,
ATEIN TYPE STRING,
AENNR TYPE STRING,
DATUV TYPE STRING,
CATWRT TYPE STRING,
CATFLV TYPE STRING,
ATIMB TYPE STRING,
ATZIS TYPE STRING,
ATSRT TYPE STRING,
ATVGLART TYPE STRING,
ADZHL TYPE STRING,
EST_ATWRT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGCOMWIOT_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_RCGCOMWIOT_STR-ESTCAT sy-vline 
WA_RCGCOMWIOT_STR-ESTNAM sy-vline 
WA_RCGCOMWIOT_STR-CLINT sy-vline 
WA_RCGCOMWIOT_STR-KLART sy-vline 
WA_RCGCOMWIOT_STR-CLASS sy-vline 
WA_RCGCOMWIOT_STR-KLAGR sy-vline 
WA_RCGCOMWIOT_STR-BGRSE sy-vline 
WA_RCGCOMWIOT_STR-BGRKL sy-vline 
WA_RCGCOMWIOT_STR-BGRKP sy-vline 
WA_RCGCOMWIOT_STR-ANAME sy-vline 
WA_RCGCOMWIOT_STR-ADATU sy-vline 
WA_RCGCOMWIOT_STR-VNAME sy-vline 
WA_RCGCOMWIOT_STR-VDATU sy-vline 
WA_RCGCOMWIOT_STR-VONDT sy-vline 
WA_RCGCOMWIOT_STR-BISDT sy-vline 
WA_RCGCOMWIOT_STR-ANZUO sy-vline 
WA_RCGCOMWIOT_STR-PRAUS sy-vline 
WA_RCGCOMWIOT_STR-SICHT sy-vline 
WA_RCGCOMWIOT_STR-DOKNR sy-vline 
WA_RCGCOMWIOT_STR-DOKAR sy-vline 
WA_RCGCOMWIOT_STR-DOKTL sy-vline 
WA_RCGCOMWIOT_STR-DOKVR sy-vline 
WA_RCGCOMWIOT_STR-DINKZ sy-vline 
WA_RCGCOMWIOT_STR-NNORM sy-vline 
WA_RCGCOMWIOT_STR-NORMN sy-vline 
WA_RCGCOMWIOT_STR-NORMB sy-vline 
WA_RCGCOMWIOT_STR-NRMT1 sy-vline 
WA_RCGCOMWIOT_STR-NRMT2 sy-vline 
WA_RCGCOMWIOT_STR-AUSGD sy-vline 
WA_RCGCOMWIOT_STR-VERSD sy-vline 
WA_RCGCOMWIOT_STR-VERSI sy-vline 
WA_RCGCOMWIOT_STR-LEIST sy-vline 
WA_RCGCOMWIOT_STR-VERWE sy-vline 
WA_RCGCOMWIOT_STR-SPART sy-vline 
WA_RCGCOMWIOT_STR-LREF3 sy-vline 
WA_RCGCOMWIOT_STR-WWSKZ sy-vline 
WA_RCGCOMWIOT_STR-WWSSI sy-vline 
WA_RCGCOMWIOT_STR-POTPR sy-vline 
WA_RCGCOMWIOT_STR-CLOBK sy-vline 
WA_RCGCOMWIOT_STR-CLMUL sy-vline 
WA_RCGCOMWIOT_STR-CVIEW sy-vline 
WA_RCGCOMWIOT_STR-DISST sy-vline 
WA_RCGCOMWIOT_STR-MEINS sy-vline 
WA_RCGCOMWIOT_STR-CLMOD sy-vline 
WA_RCGCOMWIOT_STR-VWSTL sy-vline 
WA_RCGCOMWIOT_STR-VWPLA sy-vline 
WA_RCGCOMWIOT_STR-CLALT sy-vline 
WA_RCGCOMWIOT_STR-LBREI sy-vline 
WA_RCGCOMWIOT_STR-BNAME sy-vline 
WA_RCGCOMWIOT_STR-MAXBL sy-vline 
WA_RCGCOMWIOT_STR-KNOBJ sy-vline 
WA_RCGCOMWIOT_STR-LOCLA sy-vline 
WA_RCGCOMWIOT_STR-ATNAM sy-vline 
WA_RCGCOMWIOT_STR-FLG_IS_PHR sy-vline 
WA_RCGCOMWIOT_STR-ATINN sy-vline 
WA_RCGCOMWIOT_STR-ATZHL sy-vline 
WA_RCGCOMWIOT_STR-ATWRT sy-vline 
WA_RCGCOMWIOT_STR-ATFLV sy-vline 
WA_RCGCOMWIOT_STR-ATAWE sy-vline 
WA_RCGCOMWIOT_STR-ATFLB sy-vline 
WA_RCGCOMWIOT_STR-ATAW1 sy-vline 
WA_RCGCOMWIOT_STR-ATCOD sy-vline 
WA_RCGCOMWIOT_STR-ATTLV sy-vline 
WA_RCGCOMWIOT_STR-ATTLB sy-vline 
WA_RCGCOMWIOT_STR-ATPRZ sy-vline 
WA_RCGCOMWIOT_STR-ATINC sy-vline 
WA_RCGCOMWIOT_STR-ATAUT sy-vline 
WA_RCGCOMWIOT_STR-STATU sy-vline 
WA_RCGCOMWIOT_STR-ATFOR sy-vline 
WA_RCGCOMWIOT_STR-SLWRT sy-vline 
WA_RCGCOMWIOT_STR-SLFLV sy-vline 
WA_RCGCOMWIOT_STR-SLFLB sy-vline 
WA_RCGCOMWIOT_STR-SLCOD sy-vline 
WA_RCGCOMWIOT_STR-ATTAB sy-vline 
WA_RCGCOMWIOT_STR-ATFEL sy-vline 
WA_RCGCOMWIOT_STR-KZRED sy-vline 
WA_RCGCOMWIOT_STR-OMADD sy-vline 
WA_RCGCOMWIOT_STR-MMERB sy-vline 
WA_RCGCOMWIOT_STR-ATEIN sy-vline 
WA_RCGCOMWIOT_STR-AENNR sy-vline 
WA_RCGCOMWIOT_STR-DATUV sy-vline 
WA_RCGCOMWIOT_STR-CATWRT sy-vline 
WA_RCGCOMWIOT_STR-CATFLV sy-vline 
WA_RCGCOMWIOT_STR-ATIMB sy-vline 
WA_RCGCOMWIOT_STR-ATZIS sy-vline 
WA_RCGCOMWIOT_STR-ATSRT sy-vline 
WA_RCGCOMWIOT_STR-ATVGLART sy-vline 
WA_RCGCOMWIOT_STR-ADZHL sy-vline 
WA_RCGCOMWIOT_STR-EST_ATWRT sy-vline      INTO ld_text SEPARATED BY SPACE.

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