ABAP Select data from SAP table DCSHHDCHK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DCSHHDCHK
*  INTO TABLE @DATA(IT_DCSHHDCHK2).
*--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_DCSHHDCHK INDEX 1 INTO DATA(WA_DCSHHDCHK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DCSHHDCHK>-OBJNAME_OK = 1.
<DCSHHDCHK>-EXIS_SHLP = 1.
<DCSHHDCHK>-NAME_EQUHD = 1.
<DCSHHDCHK>-SELMTYPEOK = 1.
<DCSHHDCHK>-ELEMEXIOK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DCSHHDCHK-NOFIELDSOK, sy-vline,
  WA_DCSHHDCHK-ATTACHEXOK, sy-vline,
  WA_DCSHHDCHK-APPNOEXIT, sy-vline,
  WA_DCSHHDCHK-SELMEXITOK, sy-vline,
  WA_DCSHHDCHK-SELMEXITAC, sy-vline,
  WA_DCSHHDCHK-SELMETHOK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DCSHHDCHK 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_DCSHHDCHK 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_DCSHHDCHK INTO WA_DCSHHDCHK.


*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_DCSHHDCHK_STR, 
OBJNAME_OK TYPE STRING,
EXIS_SHLP TYPE STRING,
NAME_EQUHD TYPE STRING,
SELMTYPEOK TYPE STRING,
ELEMEXIOK TYPE STRING,
NOFIELDSOK TYPE STRING,
ATTACHEXOK TYPE STRING,
APPNOEXIT TYPE STRING,
SELMEXITOK TYPE STRING,
SELMEXITAC TYPE STRING,
SELMETHOK TYPE STRING,
SELMETHMIS TYPE STRING,
SELMETHSEL TYPE STRING,
HOTKEYOK TYPE STRING,
ONLYONETYP TYPE STRING,
ATLEASTONE TYPE STRING,
DIALOGOK TYPE STRING,
APPENDIF TYPE STRING,
APPENDING TYPE STRING,
SFWOK TYPE STRING,
AUTOSUGGESTOK TYPE STRING,
FUZZYSEARCHOK TYPE STRING,
FUZZY_SIMILAROK TYPE STRING,
FUZZYBASEOBJOK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DCSHHDCHK_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_DCSHHDCHK_STR-OBJNAME_OK sy-vline 
WA_DCSHHDCHK_STR-EXIS_SHLP sy-vline 
WA_DCSHHDCHK_STR-NAME_EQUHD sy-vline 
WA_DCSHHDCHK_STR-SELMTYPEOK sy-vline 
WA_DCSHHDCHK_STR-ELEMEXIOK sy-vline 
WA_DCSHHDCHK_STR-NOFIELDSOK sy-vline 
WA_DCSHHDCHK_STR-ATTACHEXOK sy-vline 
WA_DCSHHDCHK_STR-APPNOEXIT sy-vline 
WA_DCSHHDCHK_STR-SELMEXITOK sy-vline 
WA_DCSHHDCHK_STR-SELMEXITAC sy-vline 
WA_DCSHHDCHK_STR-SELMETHOK sy-vline 
WA_DCSHHDCHK_STR-SELMETHMIS sy-vline 
WA_DCSHHDCHK_STR-SELMETHSEL sy-vline 
WA_DCSHHDCHK_STR-HOTKEYOK sy-vline 
WA_DCSHHDCHK_STR-ONLYONETYP sy-vline 
WA_DCSHHDCHK_STR-ATLEASTONE sy-vline 
WA_DCSHHDCHK_STR-DIALOGOK sy-vline 
WA_DCSHHDCHK_STR-APPENDIF sy-vline 
WA_DCSHHDCHK_STR-APPENDING sy-vline 
WA_DCSHHDCHK_STR-SFWOK sy-vline 
WA_DCSHHDCHK_STR-AUTOSUGGESTOK sy-vline 
WA_DCSHHDCHK_STR-FUZZYSEARCHOK sy-vline 
WA_DCSHHDCHK_STR-FUZZY_SIMILAROK sy-vline 
WA_DCSHHDCHK_STR-FUZZYBASEOBJOK sy-vline      INTO ld_text SEPARATED BY SPACE.

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