ABAP Select data from SAP table RCGGENEDAT 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 RCGGENEDAT 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 RCGGENEDAT. 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 RCGGENEDAT 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_RCGGENEDAT TYPE STANDARD TABLE OF RCGGENEDAT,
      WA_RCGGENEDAT TYPE RCGGENEDAT,
      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: <RCGGENEDAT> TYPE RCGGENEDAT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGGENEDAT
*  INTO TABLE @DATA(IT_RCGGENEDAT2).
*--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_RCGGENEDAT INDEX 1 INTO DATA(WA_RCGGENEDAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGGENEDAT>-SUBID = 1.
<RCGGENEDAT>-SBGVID = 1.
<RCGGENEDAT>-LANGU = 1.
<RCGGENEDAT>-EHSDOCCAT = 1.
<RCGGENEDAT>-INTVERSION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGGENEDAT-SRCDOKAR, sy-vline,
  WA_RCGGENEDAT-SRCDOKNR, sy-vline,
  WA_RCGGENEDAT-SRCDOKVR, sy-vline,
  WA_RCGGENEDAT-SRCDOKTL, sy-vline,
  WA_RCGGENEDAT-TRGDOKAR, sy-vline,
  WA_RCGGENEDAT-TRGDOKNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGGENEDAT 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_RCGGENEDAT 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_RCGGENEDAT INTO WA_RCGGENEDAT.


*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 SPEC1, internal->external for field SUBID
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_RCGGENEDAT-SUBID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGGENEDAT-SUBID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CHRID, internal->external for field SBGVID
CALL FUNCTION 'CONVERSION_EXIT_CHRID_OUTPUT'
  EXPORTING
    input =                      WA_RCGGENEDAT-SBGVID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGGENEDAT-SBGVID.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field TRGDOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCGGENEDAT-TRGDOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGGENEDAT-TRGDOKNR.
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_RCGGENEDAT_STR, 
SUBID TYPE STRING,
SBGVID TYPE STRING,
LANGU TYPE STRING,
EHSDOCCAT TYPE STRING,
INTVERSION TYPE STRING,
SRCDOKAR TYPE STRING,
SRCDOKNR TYPE STRING,
SRCDOKVR TYPE STRING,
SRCDOKTL TYPE STRING,
TRGDOKAR TYPE STRING,
TRGDOKNR TYPE STRING,
TRGDOKVR TYPE STRING,
TRGDOKTL TYPE STRING,
ADDID TYPE STRING,
LOGID TYPE STRING,
WWIDEST TYPE STRING,
PRTYPE TYPE STRING,
TRGAPPL1 TYPE STRING,
TRGAPPL2 TYPE STRING,
FLGOK TYPE STRING,
ERRTEXT TYPE STRING,
OHORDERNO TYPE STRING,
OHORDERCNT TYPE STRING,
PROCESSCAT TYPE STRING,
COMPONENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGGENEDAT_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_RCGGENEDAT_STR-SUBID sy-vline 
WA_RCGGENEDAT_STR-SBGVID sy-vline 
WA_RCGGENEDAT_STR-LANGU sy-vline 
WA_RCGGENEDAT_STR-EHSDOCCAT sy-vline 
WA_RCGGENEDAT_STR-INTVERSION sy-vline 
WA_RCGGENEDAT_STR-SRCDOKAR sy-vline 
WA_RCGGENEDAT_STR-SRCDOKNR sy-vline 
WA_RCGGENEDAT_STR-SRCDOKVR sy-vline 
WA_RCGGENEDAT_STR-SRCDOKTL sy-vline 
WA_RCGGENEDAT_STR-TRGDOKAR sy-vline 
WA_RCGGENEDAT_STR-TRGDOKNR sy-vline 
WA_RCGGENEDAT_STR-TRGDOKVR sy-vline 
WA_RCGGENEDAT_STR-TRGDOKTL sy-vline 
WA_RCGGENEDAT_STR-ADDID sy-vline 
WA_RCGGENEDAT_STR-LOGID sy-vline 
WA_RCGGENEDAT_STR-WWIDEST sy-vline 
WA_RCGGENEDAT_STR-PRTYPE sy-vline 
WA_RCGGENEDAT_STR-TRGAPPL1 sy-vline 
WA_RCGGENEDAT_STR-TRGAPPL2 sy-vline 
WA_RCGGENEDAT_STR-FLGOK sy-vline 
WA_RCGGENEDAT_STR-ERRTEXT sy-vline 
WA_RCGGENEDAT_STR-OHORDERNO sy-vline 
WA_RCGGENEDAT_STR-OHORDERCNT sy-vline 
WA_RCGGENEDAT_STR-PROCESSCAT sy-vline 
WA_RCGGENEDAT_STR-COMPONENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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