ABAP Select data from SAP table DCVIFDCHK 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 DCVIFDCHK 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 DCVIFDCHK. 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 DCVIFDCHK 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_DCVIFDCHK TYPE STANDARD TABLE OF DCVIFDCHK,
      WA_DCVIFDCHK TYPE DCVIFDCHK,
      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: <DCVIFDCHK> TYPE DCVIFDCHK.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DCVIFDCHK
*  INTO TABLE @DATA(IT_DCVIFDCHK2).
*--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_DCVIFDCHK INDEX 1 INTO DATA(WA_DCVIFDCHK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DCVIFDCHK>-NOFIELDS = 1.
<DCVIFDCHK>-FIELDACTIV = 1.
<DCVIFDCHK>-NOBASEFLD = 1.
<DCVIFDCHK>-FIELDNCHNG = 1.
<DCVIFDCHK>-FIELDPCHNG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DCVIFDCHK-ROLLCHNG, sy-vline,
  WA_DCVIFDCHK-SAMEDOM, sy-vline,
  WA_DCVIFDCHK-SAMETYP, sy-vline,
  WA_DCVIFDCHK-KEYPOS, sy-vline,
  WA_DCVIFDCHK-MANDFIELD, sy-vline,
  WA_DCVIFDCHK-PRIMKEYFLD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DCVIFDCHK 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_DCVIFDCHK 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_DCVIFDCHK INTO WA_DCVIFDCHK.


*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_DCVIFDCHK_STR, 
NOFIELDS TYPE STRING,
FIELDACTIV TYPE STRING,
NOBASEFLD TYPE STRING,
FIELDNCHNG TYPE STRING,
FIELDPCHNG TYPE STRING,
ROLLCHNG TYPE STRING,
SAMEDOM TYPE STRING,
SAMETYP TYPE STRING,
KEYPOS TYPE STRING,
MANDFIELD TYPE STRING,
PRIMKEYFLD TYPE STRING,
KEYMISSING TYPE STRING,
UNIQUENAME TYPE STRING,
SAA_SPACE TYPE STRING,
SAA_LENGTH TYPE STRING,
SAA_CSPACE TYPE STRING,
SAA_HYPHEN TYPE STRING,
SAA_1CHBAZ TYPE STRING,
SAA_1CHUYZ TYPE STRING,
SAA_ALPHAN TYPE STRING,
SAA_2O3PC_ TYPE STRING,
SAA_TRESE TYPE STRING,
SAA_QCM TYPE STRING,
SAA_POINT TYPE STRING,
SAA_LPOS_ TYPE STRING,
SAA_LANSI TYPE STRING,
SAA_PREFIX TYPE STRING,
SAA_CASESENS TYPE STRING,
UNIFLDMISS TYPE STRING,
UNITYPMISS TYPE STRING,
NOINCLUDE TYPE STRING,
NOAPPEND TYPE STRING,
NOGROUP TYPE STRING,
CLIDEP TYPE STRING,
LANGUKEY TYPE STRING,
PCKCHK TYPE STRING,
DBCONSISTENCY TYPE STRING,
VIEWREF_USAGE TYPE STRING,
IS_VIEWREF_CHK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DCVIFDCHK_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_DCVIFDCHK_STR-NOFIELDS sy-vline 
WA_DCVIFDCHK_STR-FIELDACTIV sy-vline 
WA_DCVIFDCHK_STR-NOBASEFLD sy-vline 
WA_DCVIFDCHK_STR-FIELDNCHNG sy-vline 
WA_DCVIFDCHK_STR-FIELDPCHNG sy-vline 
WA_DCVIFDCHK_STR-ROLLCHNG sy-vline 
WA_DCVIFDCHK_STR-SAMEDOM sy-vline 
WA_DCVIFDCHK_STR-SAMETYP sy-vline 
WA_DCVIFDCHK_STR-KEYPOS sy-vline 
WA_DCVIFDCHK_STR-MANDFIELD sy-vline 
WA_DCVIFDCHK_STR-PRIMKEYFLD sy-vline 
WA_DCVIFDCHK_STR-KEYMISSING sy-vline 
WA_DCVIFDCHK_STR-UNIQUENAME sy-vline 
WA_DCVIFDCHK_STR-SAA_SPACE sy-vline 
WA_DCVIFDCHK_STR-SAA_LENGTH sy-vline 
WA_DCVIFDCHK_STR-SAA_CSPACE sy-vline 
WA_DCVIFDCHK_STR-SAA_HYPHEN sy-vline 
WA_DCVIFDCHK_STR-SAA_1CHBAZ sy-vline 
WA_DCVIFDCHK_STR-SAA_1CHUYZ sy-vline 
WA_DCVIFDCHK_STR-SAA_ALPHAN sy-vline 
WA_DCVIFDCHK_STR-SAA_2O3PC_ sy-vline 
WA_DCVIFDCHK_STR-SAA_TRESE sy-vline 
WA_DCVIFDCHK_STR-SAA_QCM sy-vline 
WA_DCVIFDCHK_STR-SAA_POINT sy-vline 
WA_DCVIFDCHK_STR-SAA_LPOS_ sy-vline 
WA_DCVIFDCHK_STR-SAA_LANSI sy-vline 
WA_DCVIFDCHK_STR-SAA_PREFIX sy-vline 
WA_DCVIFDCHK_STR-SAA_CASESENS sy-vline 
WA_DCVIFDCHK_STR-UNIFLDMISS sy-vline 
WA_DCVIFDCHK_STR-UNITYPMISS sy-vline 
WA_DCVIFDCHK_STR-NOINCLUDE sy-vline 
WA_DCVIFDCHK_STR-NOAPPEND sy-vline 
WA_DCVIFDCHK_STR-NOGROUP sy-vline 
WA_DCVIFDCHK_STR-CLIDEP sy-vline 
WA_DCVIFDCHK_STR-LANGUKEY sy-vline 
WA_DCVIFDCHK_STR-PCKCHK sy-vline 
WA_DCVIFDCHK_STR-DBCONSISTENCY sy-vline 
WA_DCVIFDCHK_STR-VIEWREF_USAGE sy-vline 
WA_DCVIFDCHK_STR-IS_VIEWREF_CHK sy-vline      INTO ld_text SEPARATED BY SPACE.

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