ABAP Select data from SAP table DDTBHDCHK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DDTBHDCHK
*  INTO TABLE @DATA(IT_DDTBHDCHK2).
*--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_DDTBHDCHK INDEX 1 INTO DATA(WA_DDTBHDCHK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DDTBHDCHK>-SAH_SPACE = 1.
<DDTBHDCHK>-SAH_LENGTH = 1.
<DDTBHDCHK>-SAH_CSPACE = 1.
<DDTBHDCHK>-SAH_HYPHEN = 1.
<DDTBHDCHK>-SAH_1CHBAZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DDTBHDCHK-SAH_1CHUYZ, sy-vline,
  WA_DDTBHDCHK-SAH_ALPHAN, sy-vline,
  WA_DDTBHDCHK-SAH_2O3PC_, sy-vline,
  WA_DDTBHDCHK-SAH_TRESE, sy-vline,
  WA_DDTBHDCHK-EXISTSNAME, sy-vline,
  WA_DDTBHDCHK-MINLENGTH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DDTBHDCHK 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_DDTBHDCHK 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_DDTBHDCHK INTO WA_DDTBHDCHK.


*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_DDTBHDCHK_STR, 
SAH_SPACE TYPE STRING,
SAH_LENGTH TYPE STRING,
SAH_CSPACE TYPE STRING,
SAH_HYPHEN TYPE STRING,
SAH_1CHBAZ TYPE STRING,
SAH_1CHUYZ TYPE STRING,
SAH_ALPHAN TYPE STRING,
SAH_2O3PC_ TYPE STRING,
SAH_TRESE TYPE STRING,
EXISTSNAME TYPE STRING,
MINLENGTH TYPE STRING,
TABLECLASS TYPE STRING,
TYPEEXISTS TYPE STRING,
POCLACTIVE TYPE STRING,
CLUSTREST TYPE STRING,
CLUSTBUFF TYPE STRING,
DELIVERYCL TYPE STRING,
TYPEVALUE TYPE STRING,
CLIDEP TYPE STRING,
BUFFERED TYPE STRING,
COMPRFLAG TYPE STRING,
ACTFLAG TYPE STRING,
BUFFER TYPE STRING,
EXSTORAGE TYPE STRING,
EXTESETT TYPE STRING,
AUTHCLASS TYPE STRING,
NTABCMP TYPE STRING,
EXPAND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DDTBHDCHK_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_DDTBHDCHK_STR-SAH_SPACE sy-vline 
WA_DDTBHDCHK_STR-SAH_LENGTH sy-vline 
WA_DDTBHDCHK_STR-SAH_CSPACE sy-vline 
WA_DDTBHDCHK_STR-SAH_HYPHEN sy-vline 
WA_DDTBHDCHK_STR-SAH_1CHBAZ sy-vline 
WA_DDTBHDCHK_STR-SAH_1CHUYZ sy-vline 
WA_DDTBHDCHK_STR-SAH_ALPHAN sy-vline 
WA_DDTBHDCHK_STR-SAH_2O3PC_ sy-vline 
WA_DDTBHDCHK_STR-SAH_TRESE sy-vline 
WA_DDTBHDCHK_STR-EXISTSNAME sy-vline 
WA_DDTBHDCHK_STR-MINLENGTH sy-vline 
WA_DDTBHDCHK_STR-TABLECLASS sy-vline 
WA_DDTBHDCHK_STR-TYPEEXISTS sy-vline 
WA_DDTBHDCHK_STR-POCLACTIVE sy-vline 
WA_DDTBHDCHK_STR-CLUSTREST sy-vline 
WA_DDTBHDCHK_STR-CLUSTBUFF sy-vline 
WA_DDTBHDCHK_STR-DELIVERYCL sy-vline 
WA_DDTBHDCHK_STR-TYPEVALUE sy-vline 
WA_DDTBHDCHK_STR-CLIDEP sy-vline 
WA_DDTBHDCHK_STR-BUFFERED sy-vline 
WA_DDTBHDCHK_STR-COMPRFLAG sy-vline 
WA_DDTBHDCHK_STR-ACTFLAG sy-vline 
WA_DDTBHDCHK_STR-BUFFER sy-vline 
WA_DDTBHDCHK_STR-EXSTORAGE sy-vline 
WA_DDTBHDCHK_STR-EXTESETT sy-vline 
WA_DDTBHDCHK_STR-AUTHCLASS sy-vline 
WA_DDTBHDCHK_STR-NTABCMP sy-vline 
WA_DDTBHDCHK_STR-EXPAND sy-vline      INTO ld_text SEPARATED BY SPACE.

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