ABAP Select data from SAP table RCGCLBUF 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 RCGCLBUF 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 RCGCLBUF. 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 RCGCLBUF 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_RCGCLBUF TYPE STANDARD TABLE OF RCGCLBUF,
      WA_RCGCLBUF TYPE RCGCLBUF,
      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: <RCGCLBUF> TYPE RCGCLBUF.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGCLBUF
*  INTO TABLE @DATA(IT_RCGCLBUF2).
*--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_RCGCLBUF INDEX 1 INTO DATA(WA_RCGCLBUF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGCLBUF>-VALFLG = 1.
<RCGCLBUF>-CHCOFLG = 1.
<RCGCLBUF>-LOCKMOD = 1.
<RCGCLBUF>-LOGLOCKMOD = 1.
<RCGCLBUF>-SAVEMOD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGCLBUF-SPLIT, sy-vline,
  WA_RCGCLBUF-BUF_ORIG_INDEX, sy-vline,
  WA_RCGCLBUF-CHANGENO, sy-vline,
  WA_RCGCLBUF-KEYDATE, sy-vline,
  WA_RCGCLBUF-MANDT, sy-vline,
  WA_RCGCLBUF-RECN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGCLBUF 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_RCGCLBUF 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_RCGCLBUF INTO WA_RCGCLBUF.


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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field ATAWE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RCGCLBUF-ATAWE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGCLBUF-ATAWE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ATAW1
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RCGCLBUF-ATAW1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGCLBUF-ATAW1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ATINN, internal->external for field ATINN
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_RCGCLBUF-ATINN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGCLBUF-ATINN.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RCGCLBUF-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGCLBUF-LANGU.
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_RCGCLBUF_STR, 
VALFLG TYPE STRING,
CHCOFLG TYPE STRING,
LOCKMOD TYPE STRING,
LOGLOCKMOD TYPE STRING,
SAVEMOD TYPE STRING,
SPLIT TYPE STRING,
BUF_ORIG_INDEX TYPE STRING,
CHANGENO TYPE STRING,
KEYDATE TYPE STRING,
MANDT TYPE STRING,
RECN TYPE STRING,
ACTN TYPE STRING,
ATSRT TYPE STRING,
ATWTB 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,
ATWRT TYPE STRING,
ATFLV TYPE STRING,
ATAWE TYPE STRING,
ATFLB TYPE STRING,
ATAW1 TYPE STRING,
ATCOD TYPE STRING,
ATTLV TYPE STRING,
ATTLB TYPE STRING,
ATPRZ TYPE STRING,
ATINC TYPE STRING,
ATAUT TYPE STRING,
ATDESCR TYPE STRING,
ATINN TYPE STRING,
ATNAM TYPE STRING,
ATFOR TYPE STRING,
ATEIN TYPE STRING,
ATPRF TYPE STRING,
ATPRT TYPE STRING,
POSNR TYPE STRING,
ESTCAT TYPE STRING,
CLINT TYPE STRING,
CLASS TYPE STRING,
ATBEZ TYPE STRING,
RECN_REFRH TYPE STRING,
FLG_IS_PHR TYPE STRING,
RECNTPH TYPE STRING,
FLG_VALFIX_DESCR TYPE STRING,
LANGU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGCLBUF_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_RCGCLBUF_STR-VALFLG sy-vline 
WA_RCGCLBUF_STR-CHCOFLG sy-vline 
WA_RCGCLBUF_STR-LOCKMOD sy-vline 
WA_RCGCLBUF_STR-LOGLOCKMOD sy-vline 
WA_RCGCLBUF_STR-SAVEMOD sy-vline 
WA_RCGCLBUF_STR-SPLIT sy-vline 
WA_RCGCLBUF_STR-BUF_ORIG_INDEX sy-vline 
WA_RCGCLBUF_STR-CHANGENO sy-vline 
WA_RCGCLBUF_STR-KEYDATE sy-vline 
WA_RCGCLBUF_STR-MANDT sy-vline 
WA_RCGCLBUF_STR-RECN sy-vline 
WA_RCGCLBUF_STR-ACTN sy-vline 
WA_RCGCLBUF_STR-ATSRT sy-vline 
WA_RCGCLBUF_STR-ATWTB sy-vline 
WA_RCGCLBUF_STR-VALFR sy-vline 
WA_RCGCLBUF_STR-VALTO sy-vline 
WA_RCGCLBUF_STR-AENNR sy-vline 
WA_RCGCLBUF_STR-DELFLG sy-vline 
WA_RCGCLBUF_STR-PARKFLG sy-vline 
WA_RCGCLBUF_STR-CRDAT sy-vline 
WA_RCGCLBUF_STR-CRNAM sy-vline 
WA_RCGCLBUF_STR-UPDDAT sy-vline 
WA_RCGCLBUF_STR-UPDNAM sy-vline 
WA_RCGCLBUF_STR-SRSID sy-vline 
WA_RCGCLBUF_STR-OWNID sy-vline 
WA_RCGCLBUF_STR-RECNROOT sy-vline 
WA_RCGCLBUF_STR-ATWRT sy-vline 
WA_RCGCLBUF_STR-ATFLV sy-vline 
WA_RCGCLBUF_STR-ATAWE sy-vline 
WA_RCGCLBUF_STR-ATFLB sy-vline 
WA_RCGCLBUF_STR-ATAW1 sy-vline 
WA_RCGCLBUF_STR-ATCOD sy-vline 
WA_RCGCLBUF_STR-ATTLV sy-vline 
WA_RCGCLBUF_STR-ATTLB sy-vline 
WA_RCGCLBUF_STR-ATPRZ sy-vline 
WA_RCGCLBUF_STR-ATINC sy-vline 
WA_RCGCLBUF_STR-ATAUT sy-vline 
WA_RCGCLBUF_STR-ATDESCR sy-vline 
WA_RCGCLBUF_STR-ATINN sy-vline 
WA_RCGCLBUF_STR-ATNAM sy-vline 
WA_RCGCLBUF_STR-ATFOR sy-vline 
WA_RCGCLBUF_STR-ATEIN sy-vline 
WA_RCGCLBUF_STR-ATPRF sy-vline 
WA_RCGCLBUF_STR-ATPRT sy-vline 
WA_RCGCLBUF_STR-POSNR sy-vline 
WA_RCGCLBUF_STR-ESTCAT sy-vline 
WA_RCGCLBUF_STR-CLINT sy-vline 
WA_RCGCLBUF_STR-CLASS sy-vline 
WA_RCGCLBUF_STR-ATBEZ sy-vline 
WA_RCGCLBUF_STR-RECN_REFRH sy-vline 
WA_RCGCLBUF_STR-FLG_IS_PHR sy-vline 
WA_RCGCLBUF_STR-RECNTPH sy-vline 
WA_RCGCLBUF_STR-FLG_VALFIX_DESCR sy-vline 
WA_RCGCLBUF_STR-LANGU sy-vline      INTO ld_text SEPARATED BY SPACE.

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