ABAP Select data from SAP table CFASG into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CFASG 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 CFASG. 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 CFASG 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_CFASG TYPE STANDARD TABLE OF CFASG,
      WA_CFASG TYPE CFASG,
      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: <CFASG> TYPE CFASG.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CFASG
*  INTO TABLE @DATA(IT_CFASG2).
*--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_CFASG INDEX 1 INTO DATA(WA_CFASG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CFASG>-MANDT = 1.
<CFASG>-ASPET = 1.
<CFASG>-ATEXT = 1.
<CFASG>-ATYPE = 1.
<CFASG>-RFASP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CFASG-TABNM, sy-vline,
  WA_CFASG-INSTR, sy-vline,
  WA_CFASG-COMTB, sy-vline,
  WA_CFASG-FYVCHA, sy-vline,
  WA_CFASG-TXT_M, sy-vline,
  WA_CFASG-FYVAR0, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CFASG 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_CFASG 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_CFASG INTO WA_CFASG.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_CFASG_STR, 
MANDT TYPE STRING,
ASPET TYPE STRING,
ATEXT TYPE STRING,
ATYPE TYPE STRING,
RFASP TYPE STRING,
TABNM TYPE STRING,
INSTR TYPE STRING,
COMTB TYPE STRING,
FYVCHA TYPE STRING,
TXT_M TYPE STRING,
FYVAR0 TYPE STRING,
ACUKY0 TYPE STRING,
SQLDB TYPE STRING,
POOLT TYPE STRING,
VIEWA TYPE STRING,
VIRTA TYPE STRING,
SAPRL TYPE STRING,
TYPTXT TYPE STRING,
CHRASP TYPE STRING,
OBJ_PRG TYPE STRING,
PRG_REC TYPE STRING,
PRG_LDB TYPE STRING,
MD_ALL TYPE STRING,
MD_VIEW TYPE STRING,
MD_ROUT TYPE STRING,
MD_TEXT TYPE STRING,
MD_DOCU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CFASG_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_CFASG_STR-MANDT sy-vline 
WA_CFASG_STR-ASPET sy-vline 
WA_CFASG_STR-ATEXT sy-vline 
WA_CFASG_STR-ATYPE sy-vline 
WA_CFASG_STR-RFASP sy-vline 
WA_CFASG_STR-TABNM sy-vline 
WA_CFASG_STR-INSTR sy-vline 
WA_CFASG_STR-COMTB sy-vline 
WA_CFASG_STR-FYVCHA sy-vline 
WA_CFASG_STR-TXT_M sy-vline 
WA_CFASG_STR-FYVAR0 sy-vline 
WA_CFASG_STR-ACUKY0 sy-vline 
WA_CFASG_STR-SQLDB sy-vline 
WA_CFASG_STR-POOLT sy-vline 
WA_CFASG_STR-VIEWA sy-vline 
WA_CFASG_STR-VIRTA sy-vline 
WA_CFASG_STR-SAPRL sy-vline 
WA_CFASG_STR-TYPTXT sy-vline 
WA_CFASG_STR-CHRASP sy-vline 
WA_CFASG_STR-OBJ_PRG sy-vline 
WA_CFASG_STR-PRG_REC sy-vline 
WA_CFASG_STR-PRG_LDB sy-vline 
WA_CFASG_STR-MD_ALL sy-vline 
WA_CFASG_STR-MD_VIEW sy-vline 
WA_CFASG_STR-MD_ROUT sy-vline 
WA_CFASG_STR-MD_TEXT sy-vline 
WA_CFASG_STR-MD_DOCU sy-vline      INTO ld_text SEPARATED BY SPACE.

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