ABAP Select data from SAP table RCGTREEREP 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 RCGTREEREP 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 RCGTREEREP. 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 RCGTREEREP 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_RCGTREEREP TYPE STANDARD TABLE OF RCGTREEREP,
      WA_RCGTREEREP TYPE RCGTREEREP,
      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: <RCGTREEREP> TYPE RCGTREEREP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGTREEREP
*  INTO TABLE @DATA(IT_RCGTREEREP2).
*--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_RCGTREEREP INDEX 1 INTO DATA(WA_RCGTREEREP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGTREEREP>-NODE_ID = 1.
<RCGTREEREP>-TCOLOR = 1.
<RCGTREEREP>-TINTENSIV = 1.
<RCGTREEREP>-ROOT = 1.
<RCGTREEREP>-LEVEL1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGTREEREP-LEVEL2, sy-vline,
  WA_RCGTREEREP-LEVEL3, sy-vline,
  WA_RCGTREEREP-LEVEL4, sy-vline,
  WA_RCGTREEREP-LEVEL5, sy-vline,
  WA_RCGTREEREP-MANDT, sy-vline,
  WA_RCGTREEREP-RECN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGTREEREP 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_RCGTREEREP 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_RCGTREEREP INTO WA_RCGTREEREP.


*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_RCGTREEREP-RECN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGTREEREP-RECN.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

*Conversion exit SPEC1, internal->external for field TREESUBID
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_RCGTREEREP-TREESUBID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGTREEREP-TREESUBID.
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_RCGTREEREP_STR, 
NODE_ID TYPE STRING,
TCOLOR TYPE STRING,
TINTENSIV TYPE STRING,
ROOT TYPE STRING,
LEVEL1 TYPE STRING,
LEVEL2 TYPE STRING,
LEVEL3 TYPE STRING,
LEVEL4 TYPE STRING,
LEVEL5 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,
SUBID TYPE STRING,
SBGVID TYPE STRING,
LANGU TYPE STRING,
EHSDOCCAT TYPE STRING,
INTVERSION TYPE STRING,
REPTYPE TYPE STRING,
REPSTATUS TYPE STRING,
DMSCAT TYPE STRING,
DMSKEY TYPE STRING,
VERSION TYPE STRING,
SUBVERSION TYPE STRING,
GENDAT TYPE STRING,
GENTIME TYPE STRING,
VALDAT TYPE STRING,
REQREASON TYPE STRING,
RELCHGFLG TYPE STRING,
REM TYPE STRING,
ICL_CONTENT TYPE STRING,
BLOCKFLG TYPE STRING,
MAINTFLG TYPE STRING,
HISTFLG TYPE STRING,
TREESUBID TYPE STRING,
LANGUTEXT TYPE STRING,
EDITICON TYPE STRING,
DISPICON TYPE STRING,
ADDDOC_ICON TYPE STRING,
INFOICON TYPE STRING,
REFRICON TYPE STRING,
ERRORICON TYPE STRING,
VERSTEXT TYPE STRING,
EXTSTAT TYPE STRING,
EXTSTATNAM TYPE STRING,
GENDTEXT TYPE STRING,
VALDTEXT TYPE STRING,
LINE TYPE STRING,
FLG_NOLOCK TYPE STRING,
MSGID TYPE STRING,
MSGTY TYPE STRING,
MSGNO TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
FLG_REFREPORT TYPE STRING,
FLG_VARIANT TYPE STRING,
FLG_LABEL TYPE STRING,
REPINFOICON TYPE STRING,
FLG_ESDS_REPORT TYPE STRING,
FLG_ESDS_SELECT TYPE STRING,
FLG_ADDDOC_FILE TYPE STRING,
FLG_ADDDOC_SELECT TYPE STRING,
USREPVIEW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGTREEREP_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_RCGTREEREP_STR-NODE_ID sy-vline 
WA_RCGTREEREP_STR-TCOLOR sy-vline 
WA_RCGTREEREP_STR-TINTENSIV sy-vline 
WA_RCGTREEREP_STR-ROOT sy-vline 
WA_RCGTREEREP_STR-LEVEL1 sy-vline 
WA_RCGTREEREP_STR-LEVEL2 sy-vline 
WA_RCGTREEREP_STR-LEVEL3 sy-vline 
WA_RCGTREEREP_STR-LEVEL4 sy-vline 
WA_RCGTREEREP_STR-LEVEL5 sy-vline 
WA_RCGTREEREP_STR-MANDT sy-vline 
WA_RCGTREEREP_STR-RECN sy-vline 
WA_RCGTREEREP_STR-ACTN sy-vline 
WA_RCGTREEREP_STR-VALFR sy-vline 
WA_RCGTREEREP_STR-VALTO sy-vline 
WA_RCGTREEREP_STR-AENNR sy-vline 
WA_RCGTREEREP_STR-DELFLG sy-vline 
WA_RCGTREEREP_STR-PARKFLG sy-vline 
WA_RCGTREEREP_STR-CRDAT sy-vline 
WA_RCGTREEREP_STR-CRNAM sy-vline 
WA_RCGTREEREP_STR-UPDDAT sy-vline 
WA_RCGTREEREP_STR-UPDNAM sy-vline 
WA_RCGTREEREP_STR-SRSID sy-vline 
WA_RCGTREEREP_STR-OWNID sy-vline 
WA_RCGTREEREP_STR-RECNROOT sy-vline 
WA_RCGTREEREP_STR-SUBID sy-vline 
WA_RCGTREEREP_STR-SBGVID sy-vline 
WA_RCGTREEREP_STR-LANGU sy-vline 
WA_RCGTREEREP_STR-EHSDOCCAT sy-vline 
WA_RCGTREEREP_STR-INTVERSION sy-vline 
WA_RCGTREEREP_STR-REPTYPE sy-vline 
WA_RCGTREEREP_STR-REPSTATUS sy-vline 
WA_RCGTREEREP_STR-DMSCAT sy-vline 
WA_RCGTREEREP_STR-DMSKEY sy-vline 
WA_RCGTREEREP_STR-VERSION sy-vline 
WA_RCGTREEREP_STR-SUBVERSION sy-vline 
WA_RCGTREEREP_STR-GENDAT sy-vline 
WA_RCGTREEREP_STR-GENTIME sy-vline 
WA_RCGTREEREP_STR-VALDAT sy-vline 
WA_RCGTREEREP_STR-REQREASON sy-vline 
WA_RCGTREEREP_STR-RELCHGFLG sy-vline 
WA_RCGTREEREP_STR-REM sy-vline 
WA_RCGTREEREP_STR-ICL_CONTENT sy-vline 
WA_RCGTREEREP_STR-BLOCKFLG sy-vline 
WA_RCGTREEREP_STR-MAINTFLG sy-vline 
WA_RCGTREEREP_STR-HISTFLG sy-vline 
WA_RCGTREEREP_STR-TREESUBID sy-vline 
WA_RCGTREEREP_STR-LANGUTEXT sy-vline 
WA_RCGTREEREP_STR-EDITICON sy-vline 
WA_RCGTREEREP_STR-DISPICON sy-vline 
WA_RCGTREEREP_STR-ADDDOC_ICON sy-vline 
WA_RCGTREEREP_STR-INFOICON sy-vline 
WA_RCGTREEREP_STR-REFRICON sy-vline 
WA_RCGTREEREP_STR-ERRORICON sy-vline 
WA_RCGTREEREP_STR-VERSTEXT sy-vline 
WA_RCGTREEREP_STR-EXTSTAT sy-vline 
WA_RCGTREEREP_STR-EXTSTATNAM sy-vline 
WA_RCGTREEREP_STR-GENDTEXT sy-vline 
WA_RCGTREEREP_STR-VALDTEXT sy-vline 
WA_RCGTREEREP_STR-LINE sy-vline 
WA_RCGTREEREP_STR-FLG_NOLOCK sy-vline 
WA_RCGTREEREP_STR-MSGID sy-vline 
WA_RCGTREEREP_STR-MSGTY sy-vline 
WA_RCGTREEREP_STR-MSGNO sy-vline 
WA_RCGTREEREP_STR-MSGV1 sy-vline 
WA_RCGTREEREP_STR-MSGV2 sy-vline 
WA_RCGTREEREP_STR-MSGV3 sy-vline 
WA_RCGTREEREP_STR-MSGV4 sy-vline 
WA_RCGTREEREP_STR-FLG_REFREPORT sy-vline 
WA_RCGTREEREP_STR-FLG_VARIANT sy-vline 
WA_RCGTREEREP_STR-FLG_LABEL sy-vline 
WA_RCGTREEREP_STR-REPINFOICON sy-vline 
WA_RCGTREEREP_STR-FLG_ESDS_REPORT sy-vline 
WA_RCGTREEREP_STR-FLG_ESDS_SELECT sy-vline 
WA_RCGTREEREP_STR-FLG_ADDDOC_FILE sy-vline 
WA_RCGTREEREP_STR-FLG_ADDDOC_SELECT sy-vline 
WA_RCGTREEREP_STR-USREPVIEW sy-vline      INTO ld_text SEPARATED BY SPACE.

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