ABAP Select data from SAP table RCGGENFRG 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 RCGGENFRG 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 RCGGENFRG. 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 RCGGENFRG 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_RCGGENFRG TYPE STANDARD TABLE OF RCGGENFRG,
      WA_RCGGENFRG TYPE RCGGENFRG,
      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: <RCGGENFRG> TYPE RCGGENFRG.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGGENFRG
*  INTO TABLE @DATA(IT_RCGGENFRG2).
*--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_RCGGENFRG INDEX 1 INTO DATA(WA_RCGGENFRG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGGENFRG>-MARKFLG = 1.
<RCGGENFRG>-SELEFLG = 1.
<RCGGENFRG>-LINENO = 1.
<RCGGENFRG>-LINEMOD = 1.
<RCGGENFRG>-CHCOFLG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGGENFRG-LOCKMOD, sy-vline,
  WA_RCGGENFRG-INTRFLG, sy-vline,
  WA_RCGGENFRG-MANDT, sy-vline,
  WA_RCGGENFRG-RECN, sy-vline,
  WA_RCGGENFRG-ACTN, sy-vline,
  WA_RCGGENFRG-VALFR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGGENFRG 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_RCGGENFRG 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_RCGGENFRG INTO WA_RCGGENFRG.


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

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

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

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

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

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

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RCGGENFRG-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGGENFRG-LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCGGENFRG-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGGENFRG-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_RCGGENFRG_STR, 
MARKFLG TYPE STRING,
SELEFLG TYPE STRING,
LINENO TYPE STRING,
LINEMOD TYPE STRING,
CHCOFLG TYPE STRING,
LOCKMOD TYPE STRING,
INTRFLG TYPE STRING,
MANDT TYPE STRING,
RECN TYPE STRING,
ACTN TYPE STRING,
VALFR TYPE STRING,
VALTO TYPE STRING,
AENNR TYPE STRING,
DELFLG TYPE STRING,
PARKFLG TYPE STRING,
CRDAT TYPE STRING,
CRNAM TYPE STRING,
UPDDAT TYPE STRING,
UPDNAM TYPE STRING,
SRSID TYPE STRING,
OWNID TYPE STRING,
RECNROOT TYPE STRING,
NAMEMST TYPE STRING,
RECNMST TYPE STRING,
TEXTCAT TYPE STRING,
ORD TYPE STRING,
LANGU TYPE STRING,
HEADER TYPE STRING,
LTXTFLG TYPE STRING,
FORMATFLG TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
DOCDATE TYPE STRING,
TEXTNAM TYPE STRING,
LTXTUPD TYPE STRING,
PREPFLG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGGENFRG_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_RCGGENFRG_STR-MARKFLG sy-vline 
WA_RCGGENFRG_STR-SELEFLG sy-vline 
WA_RCGGENFRG_STR-LINENO sy-vline 
WA_RCGGENFRG_STR-LINEMOD sy-vline 
WA_RCGGENFRG_STR-CHCOFLG sy-vline 
WA_RCGGENFRG_STR-LOCKMOD sy-vline 
WA_RCGGENFRG_STR-INTRFLG sy-vline 
WA_RCGGENFRG_STR-MANDT sy-vline 
WA_RCGGENFRG_STR-RECN sy-vline 
WA_RCGGENFRG_STR-ACTN sy-vline 
WA_RCGGENFRG_STR-VALFR sy-vline 
WA_RCGGENFRG_STR-VALTO sy-vline 
WA_RCGGENFRG_STR-AENNR sy-vline 
WA_RCGGENFRG_STR-DELFLG sy-vline 
WA_RCGGENFRG_STR-PARKFLG sy-vline 
WA_RCGGENFRG_STR-CRDAT sy-vline 
WA_RCGGENFRG_STR-CRNAM sy-vline 
WA_RCGGENFRG_STR-UPDDAT sy-vline 
WA_RCGGENFRG_STR-UPDNAM sy-vline 
WA_RCGGENFRG_STR-SRSID sy-vline 
WA_RCGGENFRG_STR-OWNID sy-vline 
WA_RCGGENFRG_STR-RECNROOT sy-vline 
WA_RCGGENFRG_STR-NAMEMST sy-vline 
WA_RCGGENFRG_STR-RECNMST sy-vline 
WA_RCGGENFRG_STR-TEXTCAT sy-vline 
WA_RCGGENFRG_STR-ORD sy-vline 
WA_RCGGENFRG_STR-LANGU sy-vline 
WA_RCGGENFRG_STR-HEADER sy-vline 
WA_RCGGENFRG_STR-LTXTFLG sy-vline 
WA_RCGGENFRG_STR-FORMATFLG sy-vline 
WA_RCGGENFRG_STR-DOKAR sy-vline 
WA_RCGGENFRG_STR-DOKNR sy-vline 
WA_RCGGENFRG_STR-DOKVR sy-vline 
WA_RCGGENFRG_STR-DOKTL sy-vline 
WA_RCGGENFRG_STR-DOCDATE sy-vline 
WA_RCGGENFRG_STR-TEXTNAM sy-vline 
WA_RCGGENFRG_STR-LTXTUPD sy-vline 
WA_RCGGENFRG_STR-PREPFLG sy-vline      INTO ld_text SEPARATED BY SPACE.

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