ABAP Select data from SAP table DCRTYPCHK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DCRTYPCHK
*  INTO TABLE @DATA(IT_DCRTYPCHK2).
*--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_DCRTYPCHK INDEX 1 INTO DATA(WA_DCRTYPCHK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DCRTYPCHK>-RANGESROW = 1.
<DCRTYPCHK>-DIRECTTYPE = 1.
<DCRTYPCHK>-DTELACTIVE = 1.
<DCRTYPCHK>-STRUACTIVE = 1.
<DCRTYPCHK>-TTYPACTIVE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DCRTYPCHK-REFTYPE, sy-vline,
  WA_DCRTYPCHK-CLIFREFTYP, sy-vline,
  WA_DCRTYPCHK-ROWTYPEGEN, sy-vline,
  WA_DCRTYPCHK-ROWTYPEKEY, sy-vline,
  WA_DCRTYPCHK-PROXYTYPE, sy-vline,
  WA_DCRTYPCHK-ABAP_LANG_VERS_USED_OBJ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DCRTYPCHK 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_DCRTYPCHK 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_DCRTYPCHK INTO WA_DCRTYPCHK.


*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_DCRTYPCHK_STR, 
RANGESROW TYPE STRING,
DIRECTTYPE TYPE STRING,
DTELACTIVE TYPE STRING,
STRUACTIVE TYPE STRING,
TTYPACTIVE TYPE STRING,
REFTYPE TYPE STRING,
CLIFREFTYP TYPE STRING,
ROWTYPEGEN TYPE STRING,
ROWTYPEKEY TYPE STRING,
PROXYTYPE TYPE STRING,
ABAP_LANG_VERS_USED_OBJ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DCRTYPCHK_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_DCRTYPCHK_STR-RANGESROW sy-vline 
WA_DCRTYPCHK_STR-DIRECTTYPE sy-vline 
WA_DCRTYPCHK_STR-DTELACTIVE sy-vline 
WA_DCRTYPCHK_STR-STRUACTIVE sy-vline 
WA_DCRTYPCHK_STR-TTYPACTIVE sy-vline 
WA_DCRTYPCHK_STR-REFTYPE sy-vline 
WA_DCRTYPCHK_STR-CLIFREFTYP sy-vline 
WA_DCRTYPCHK_STR-ROWTYPEGEN sy-vline 
WA_DCRTYPCHK_STR-ROWTYPEKEY sy-vline 
WA_DCRTYPCHK_STR-PROXYTYPE sy-vline 
WA_DCRTYPCHK_STR-ABAP_LANG_VERS_USED_OBJ sy-vline      INTO ld_text SEPARATED BY SPACE.

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