ABAP Select data from SAP table DD04V_CHKRES into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DD04V_CHKRES 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 DD04V_CHKRES. 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 DD04V_CHKRES 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_DD04V_CHKRES TYPE STANDARD TABLE OF DD04V_CHKRES,
      WA_DD04V_CHKRES TYPE DD04V_CHKRES,
      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: <DD04V_CHKRES> TYPE DD04V_CHKRES.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DD04V_CHKRES.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DD04V_CHKRES
  INTO TABLE IT_DD04V_CHKRES.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DD04V_CHKRES
*  INTO TABLE @DATA(IT_DD04V_CHKRES2).
*--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_DD04V_CHKRES INDEX 1 INTO DATA(WA_DD04V_CHKRES2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DD04V_CHKRES ASSIGNING <DD04V_CHKRES>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DD04V_CHKRES>-DTELNAME = 1.
<DD04V_CHKRES>-DATATYPE_CHG = 1.
<DD04V_CHKRES>-DATATYPE_OLD = 1.
<DD04V_CHKRES>-DATATYPE_NEW = 1.
<DD04V_CHKRES>-LENGTH_CHG = 1.

ENDLOOP.

LOOP AT IT_DD04V_CHKRES INTO WA_DD04V_CHKRES.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DD04V_CHKRES-LENGTH_OLD, sy-vline,
  WA_DD04V_CHKRES-LENGTH_NEW, sy-vline,
  WA_DD04V_CHKRES-DECIMALS_CHG, sy-vline,
  WA_DD04V_CHKRES-DECIMALS_OLD, sy-vline,
  WA_DD04V_CHKRES-DECIMALS_NEW, sy-vline,
  WA_DD04V_CHKRES-DOMNAME_CHG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DD04V_CHKRES 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_DD04V_CHKRES 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_DD04V_CHKRES INTO WA_DD04V_CHKRES.


*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 DATATYPE_OLD
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_DD04V_CHKRES-DATATYPE_OLD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DD04V_CHKRES-DATATYPE_OLD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DTYPE, internal->external for field DATATYPE_NEW
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_DD04V_CHKRES-DATATYPE_NEW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DD04V_CHKRES-DATATYPE_NEW.
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_DD04V_CHKRES_STR, 
DTELNAME TYPE STRING,
DATATYPE_CHG TYPE STRING,
DATATYPE_OLD TYPE STRING,
DATATYPE_NEW TYPE STRING,
LENGTH_CHG TYPE STRING,
LENGTH_OLD TYPE STRING,
LENGTH_NEW TYPE STRING,
DECIMALS_CHG TYPE STRING,
DECIMALS_OLD TYPE STRING,
DECIMALS_NEW TYPE STRING,
DOMNAME_CHG TYPE STRING,
DOMNAME_OLD TYPE STRING,
DOMNAME_NEW TYPE STRING,
REFKIND_CHG TYPE STRING,
REFKIND_OLD TYPE STRING,
REFKIND_NEW TYPE STRING,
DATA_LOSS TYPE STRING,
TABLE_CONVERSION TYPE STRING,
CHK_RC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DD04V_CHKRES_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_DD04V_CHKRES_STR-DTELNAME sy-vline 
WA_DD04V_CHKRES_STR-DATATYPE_CHG sy-vline 
WA_DD04V_CHKRES_STR-DATATYPE_OLD sy-vline 
WA_DD04V_CHKRES_STR-DATATYPE_NEW sy-vline 
WA_DD04V_CHKRES_STR-LENGTH_CHG sy-vline 
WA_DD04V_CHKRES_STR-LENGTH_OLD sy-vline 
WA_DD04V_CHKRES_STR-LENGTH_NEW sy-vline 
WA_DD04V_CHKRES_STR-DECIMALS_CHG sy-vline 
WA_DD04V_CHKRES_STR-DECIMALS_OLD sy-vline 
WA_DD04V_CHKRES_STR-DECIMALS_NEW sy-vline 
WA_DD04V_CHKRES_STR-DOMNAME_CHG sy-vline 
WA_DD04V_CHKRES_STR-DOMNAME_OLD sy-vline 
WA_DD04V_CHKRES_STR-DOMNAME_NEW sy-vline 
WA_DD04V_CHKRES_STR-REFKIND_CHG sy-vline 
WA_DD04V_CHKRES_STR-REFKIND_OLD sy-vline 
WA_DD04V_CHKRES_STR-REFKIND_NEW sy-vline 
WA_DD04V_CHKRES_STR-DATA_LOSS sy-vline 
WA_DD04V_CHKRES_STR-TABLE_CONVERSION sy-vline 
WA_DD04V_CHKRES_STR-CHK_RC sy-vline      INTO ld_text SEPARATED BY SPACE.

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