ABAP Select data from SAP table RCGAPI61 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RCGAPI61 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 RCGAPI61. 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 RCGAPI61 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_RCGAPI61 TYPE STANDARD TABLE OF RCGAPI61,
      WA_RCGAPI61 TYPE RCGAPI61,
      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: <RCGAPI61> TYPE RCGAPI61.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RCGAPI61.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RCGAPI61
  INTO TABLE IT_RCGAPI61.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGAPI61
*  INTO TABLE @DATA(IT_RCGAPI612).
*--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_RCGAPI61 INDEX 1 INTO DATA(WA_RCGAPI612).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RCGAPI61 ASSIGNING <RCGAPI61>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGAPI61>-ERRORMODE = 1.
<RCGAPI61>-ERRORINFO = 1.
<RCGAPI61>-ERRORCLASS = 1.
<RCGAPI61>-ERRORPARAM = 1.
<RCGAPI61>-LOGLOCKMOD = 1.

ENDLOOP.

LOOP AT IT_RCGAPI61 INTO WA_RCGAPI61.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGAPI61-EXTINFO, sy-vline,
  WA_RCGAPI61-LINEMOD, sy-vline,
  WA_RCGAPI61-MANDT, sy-vline,
  WA_RCGAPI61-CATPIN, sy-vline,
  WA_RCGAPI61-CATFLG, sy-vline,
  WA_RCGAPI61-CATDIST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGAPI61 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_RCGAPI61 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_RCGAPI61 INTO WA_RCGAPI61.


*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_RCGAPI61_STR, 
ERRORMODE TYPE STRING,
ERRORINFO TYPE STRING,
ERRORCLASS TYPE STRING,
ERRORPARAM TYPE STRING,
LOGLOCKMOD TYPE STRING,
EXTINFO TYPE STRING,
LINEMOD TYPE STRING,
MANDT TYPE STRING,
CATPIN TYPE STRING,
CATFLG TYPE STRING,
CATDIST TYPE STRING,
CATDATE TYPE STRING,
CATVERS TYPE STRING,
CHECKF TYPE STRING,
NUMRNGE TYPE STRING,
NUMINTI TYPE STRING,
NUMINTE TYPE STRING,
REM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGAPI61_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_RCGAPI61_STR-ERRORMODE sy-vline 
WA_RCGAPI61_STR-ERRORINFO sy-vline 
WA_RCGAPI61_STR-ERRORCLASS sy-vline 
WA_RCGAPI61_STR-ERRORPARAM sy-vline 
WA_RCGAPI61_STR-LOGLOCKMOD sy-vline 
WA_RCGAPI61_STR-EXTINFO sy-vline 
WA_RCGAPI61_STR-LINEMOD sy-vline 
WA_RCGAPI61_STR-MANDT sy-vline 
WA_RCGAPI61_STR-CATPIN sy-vline 
WA_RCGAPI61_STR-CATFLG sy-vline 
WA_RCGAPI61_STR-CATDIST sy-vline 
WA_RCGAPI61_STR-CATDATE sy-vline 
WA_RCGAPI61_STR-CATVERS sy-vline 
WA_RCGAPI61_STR-CHECKF sy-vline 
WA_RCGAPI61_STR-NUMRNGE sy-vline 
WA_RCGAPI61_STR-NUMINTI sy-vline 
WA_RCGAPI61_STR-NUMINTE sy-vline 
WA_RCGAPI61_STR-REM sy-vline      INTO ld_text SEPARATED BY SPACE.

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