ABAP Select data from SAP table RCGAPIDRAD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGAPIDRAD
*  INTO TABLE @DATA(IT_RCGAPIDRAD2).
*--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_RCGAPIDRAD INDEX 1 INTO DATA(WA_RCGAPIDRAD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGAPIDRAD>-MANDT = 1.
<RCGAPIDRAD>-DOKAR = 1.
<RCGAPIDRAD>-DOKNR = 1.
<RCGAPIDRAD>-DOKVR = 1.
<RCGAPIDRAD>-DOKTL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGAPIDRAD-DOKOB, sy-vline,
  WA_RCGAPIDRAD-OBZAE, sy-vline,
  WA_RCGAPIDRAD-OBJKY, sy-vline,
  WA_RCGAPIDRAD-VRKSTAT, sy-vline,
  WA_RCGAPIDRAD-VRKSTAT1, sy-vline,
  WA_RCGAPIDRAD-VOBJ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGAPIDRAD 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_RCGAPIDRAD 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_RCGAPIDRAD INTO WA_RCGAPIDRAD.


*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_RCGAPIDRAD-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGAPIDRAD-DOKNR.
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_RCGAPIDRAD_STR, 
MANDT TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
DOKOB TYPE STRING,
OBZAE TYPE STRING,
OBJKY TYPE STRING,
VRKSTAT TYPE STRING,
VRKSTAT1 TYPE STRING,
VOBJ TYPE STRING,
VKEY TYPE STRING,
VDIR TYPE STRING,
VIEWFLAG TYPE STRING,
DELFLAG TYPE STRING,
LONGTEXT_ID TYPE STRING,
CAD_POS TYPE STRING,
CM_FIXED TYPE STRING,
ARCHFLAG TYPE STRING,
DUMMY_DRAD_INCL_EEW_PS TYPE STRING,
BO_ALTKEY TYPE STRING,
ERRORMODE TYPE STRING,
ERRORINFO TYPE STRING,
ERRORCLASS TYPE STRING,
ERRORPARAM TYPE STRING,
LOGLOCKMOD TYPE STRING,
EXTINFO TYPE STRING,
LINEMOD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGAPIDRAD_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_RCGAPIDRAD_STR-MANDT sy-vline 
WA_RCGAPIDRAD_STR-DOKAR sy-vline 
WA_RCGAPIDRAD_STR-DOKNR sy-vline 
WA_RCGAPIDRAD_STR-DOKVR sy-vline 
WA_RCGAPIDRAD_STR-DOKTL sy-vline 
WA_RCGAPIDRAD_STR-DOKOB sy-vline 
WA_RCGAPIDRAD_STR-OBZAE sy-vline 
WA_RCGAPIDRAD_STR-OBJKY sy-vline 
WA_RCGAPIDRAD_STR-VRKSTAT sy-vline 
WA_RCGAPIDRAD_STR-VRKSTAT1 sy-vline 
WA_RCGAPIDRAD_STR-VOBJ sy-vline 
WA_RCGAPIDRAD_STR-VKEY sy-vline 
WA_RCGAPIDRAD_STR-VDIR sy-vline 
WA_RCGAPIDRAD_STR-VIEWFLAG sy-vline 
WA_RCGAPIDRAD_STR-DELFLAG sy-vline 
WA_RCGAPIDRAD_STR-LONGTEXT_ID sy-vline 
WA_RCGAPIDRAD_STR-CAD_POS sy-vline 
WA_RCGAPIDRAD_STR-CM_FIXED sy-vline 
WA_RCGAPIDRAD_STR-ARCHFLAG sy-vline 
WA_RCGAPIDRAD_STR-DUMMY_DRAD_INCL_EEW_PS sy-vline 
WA_RCGAPIDRAD_STR-BO_ALTKEY sy-vline 
WA_RCGAPIDRAD_STR-ERRORMODE sy-vline 
WA_RCGAPIDRAD_STR-ERRORINFO sy-vline 
WA_RCGAPIDRAD_STR-ERRORCLASS sy-vline 
WA_RCGAPIDRAD_STR-ERRORPARAM sy-vline 
WA_RCGAPIDRAD_STR-LOGLOCKMOD sy-vline 
WA_RCGAPIDRAD_STR-EXTINFO sy-vline 
WA_RCGAPIDRAD_STR-LINEMOD sy-vline      INTO ld_text SEPARATED BY SPACE.

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