ABAP Select data from SAP table CGDRFF 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 CGDRFF 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 CGDRFF. 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 CGDRFF 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_CGDRFF TYPE STANDARD TABLE OF CGDRFF,
      WA_CGDRFF TYPE CGDRFF,
      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: <CGDRFF> TYPE CGDRFF.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CGDRFF
*  INTO TABLE @DATA(IT_CGDRFF2).
*--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_CGDRFF INDEX 1 INTO DATA(WA_CGDRFF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CGDRFF>-FIENM = 1.
<CGDRFF>-USGFL = 1.
<CGDRFF>-ROLNM = 1.
<CGDRFF>-DOMNM = 1.
<CGDRFF>-KEYFL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CGDRFF-CHTAB, sy-vline,
  WA_CGDRFF-CHFIE, sy-vline,
  WA_CGDRFF-VALEX, sy-vline,
  WA_CGDRFF-DTYPE, sy-vline,
  WA_CGDRFF-DIGIT, sy-vline,
  WA_CGDRFF-ILENG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CGDRFF 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_CGDRFF 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_CGDRFF INTO WA_CGDRFF.


*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 DTYPE, internal->external for field DTYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_CGDRFF-DTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CGDRFF-DTYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNIT0
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CGDRFF-UNIT0
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CGDRFF-UNIT0.
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_CGDRFF_STR, 
FIENM TYPE STRING,
USGFL TYPE STRING,
ROLNM TYPE STRING,
DOMNM TYPE STRING,
KEYFL TYPE STRING,
CHTAB TYPE STRING,
CHFIE TYPE STRING,
VALEX TYPE STRING,
DTYPE TYPE STRING,
DIGIT TYPE STRING,
ILENG TYPE STRING,
ORTAB TYPE STRING,
ORFIE TYPE STRING,
OAPPL TYPE STRING,
OAFIE TYPE STRING,
CHTEX TYPE STRING,
NOVAL TYPE STRING,
TIMFL TYPE STRING,
TIMLC TYPE STRING,
RETAB TYPE STRING,
REFIE TYPE STRING,
REFIL TYPE STRING,
REFLL TYPE STRING,
VIEWN TYPE STRING,
TCDIS TYPE STRING,
TCMOD TYPE STRING,
ATRFB TYPE STRING,
FIXVL TYPE STRING,
CONVX TYPE STRING,
CVMRK TYPE STRING,
DIMPR TYPE STRING,
CHTCU TYPE STRING,
CHTUN TYPE STRING,
CQMRK TYPE STRING,
CMARK TYPE STRING,
QMARK TYPE STRING,
DMARK TYPE STRING,
CUKY0 TYPE STRING,
UNIT0 TYPE STRING,
CQFIE TYPE STRING,
RFTAB TYPE STRING,
RFFIE TYPE STRING,
DSRFF TYPE STRING,
ODSRF TYPE STRING,
SBGRP TYPE STRING,
AGGDI TYPE STRING,
AGGTM TYPE STRING,
AGGFI TYPE STRING,
PRSNT TYPE STRING,
PRDEC TYPE STRING,
CCNUM TYPE STRING,
DCURR TYPE STRING,
COBJID TYPE STRING,
TXT_L TYPE STRING,
TXT_M TYPE STRING,
TXT_S TYPE STRING,
TXT_R TYPE STRING,
MARK TYPE STRING,
CHANGED TYPE STRING,
PICK TYPE STRING,
FCAT TYPE STRING,
SFCAT TYPE STRING,
FSYS TYPE STRING,
RSYS TYPE STRING,
DSYS TYPE STRING,
FSTA TYPE STRING,
DSTA TYPE STRING,
RSTA TYPE STRING,
ASPFL TYPE STRING,
POSIT TYPE STRING,
ERROR TYPE STRING,
TXTFL TYPE STRING,
ATRST TYPE STRING,
LOCKED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CGDRFF_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_CGDRFF_STR-FIENM sy-vline 
WA_CGDRFF_STR-USGFL sy-vline 
WA_CGDRFF_STR-ROLNM sy-vline 
WA_CGDRFF_STR-DOMNM sy-vline 
WA_CGDRFF_STR-KEYFL sy-vline 
WA_CGDRFF_STR-CHTAB sy-vline 
WA_CGDRFF_STR-CHFIE sy-vline 
WA_CGDRFF_STR-VALEX sy-vline 
WA_CGDRFF_STR-DTYPE sy-vline 
WA_CGDRFF_STR-DIGIT sy-vline 
WA_CGDRFF_STR-ILENG sy-vline 
WA_CGDRFF_STR-ORTAB sy-vline 
WA_CGDRFF_STR-ORFIE sy-vline 
WA_CGDRFF_STR-OAPPL sy-vline 
WA_CGDRFF_STR-OAFIE sy-vline 
WA_CGDRFF_STR-CHTEX sy-vline 
WA_CGDRFF_STR-NOVAL sy-vline 
WA_CGDRFF_STR-TIMFL sy-vline 
WA_CGDRFF_STR-TIMLC sy-vline 
WA_CGDRFF_STR-RETAB sy-vline 
WA_CGDRFF_STR-REFIE sy-vline 
WA_CGDRFF_STR-REFIL sy-vline 
WA_CGDRFF_STR-REFLL sy-vline 
WA_CGDRFF_STR-VIEWN sy-vline 
WA_CGDRFF_STR-TCDIS sy-vline 
WA_CGDRFF_STR-TCMOD sy-vline 
WA_CGDRFF_STR-ATRFB sy-vline 
WA_CGDRFF_STR-FIXVL sy-vline 
WA_CGDRFF_STR-CONVX sy-vline 
WA_CGDRFF_STR-CVMRK sy-vline 
WA_CGDRFF_STR-DIMPR sy-vline 
WA_CGDRFF_STR-CHTCU sy-vline 
WA_CGDRFF_STR-CHTUN sy-vline 
WA_CGDRFF_STR-CQMRK sy-vline 
WA_CGDRFF_STR-CMARK sy-vline 
WA_CGDRFF_STR-QMARK sy-vline 
WA_CGDRFF_STR-DMARK sy-vline 
WA_CGDRFF_STR-CUKY0 sy-vline 
WA_CGDRFF_STR-UNIT0 sy-vline 
WA_CGDRFF_STR-CQFIE sy-vline 
WA_CGDRFF_STR-RFTAB sy-vline 
WA_CGDRFF_STR-RFFIE sy-vline 
WA_CGDRFF_STR-DSRFF sy-vline 
WA_CGDRFF_STR-ODSRF sy-vline 
WA_CGDRFF_STR-SBGRP sy-vline 
WA_CGDRFF_STR-AGGDI sy-vline 
WA_CGDRFF_STR-AGGTM sy-vline 
WA_CGDRFF_STR-AGGFI sy-vline 
WA_CGDRFF_STR-PRSNT sy-vline 
WA_CGDRFF_STR-PRDEC sy-vline 
WA_CGDRFF_STR-CCNUM sy-vline 
WA_CGDRFF_STR-DCURR sy-vline 
WA_CGDRFF_STR-COBJID sy-vline 
WA_CGDRFF_STR-TXT_L sy-vline 
WA_CGDRFF_STR-TXT_M sy-vline 
WA_CGDRFF_STR-TXT_S sy-vline 
WA_CGDRFF_STR-TXT_R sy-vline 
WA_CGDRFF_STR-MARK sy-vline 
WA_CGDRFF_STR-CHANGED sy-vline 
WA_CGDRFF_STR-PICK sy-vline 
WA_CGDRFF_STR-FCAT sy-vline 
WA_CGDRFF_STR-SFCAT sy-vline 
WA_CGDRFF_STR-FSYS sy-vline 
WA_CGDRFF_STR-RSYS sy-vline 
WA_CGDRFF_STR-DSYS sy-vline 
WA_CGDRFF_STR-FSTA sy-vline 
WA_CGDRFF_STR-DSTA sy-vline 
WA_CGDRFF_STR-RSTA sy-vline 
WA_CGDRFF_STR-ASPFL sy-vline 
WA_CGDRFF_STR-POSIT sy-vline 
WA_CGDRFF_STR-ERROR sy-vline 
WA_CGDRFF_STR-TXTFL sy-vline 
WA_CGDRFF_STR-ATRST sy-vline 
WA_CGDRFF_STR-LOCKED sy-vline      INTO ld_text SEPARATED BY SPACE.

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