ABAP Select data from SAP table BDL_TYPE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BDL_TYPE
*  INTO TABLE @DATA(IT_BDL_TYPE2).
*--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_BDL_TYPE INDEX 1 INTO DATA(WA_BDL_TYPE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BDL_TYPE>-ACCP = 1.
<BDL_TYPE>-CLNT = 1.
<BDL_TYPE>-CUKY = 1.
<BDL_TYPE>-DATS = 1.
<BDL_TYPE>-FLTP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BDL_TYPE-INT1, sy-vline,
  WA_BDL_TYPE-INT2, sy-vline,
  WA_BDL_TYPE-INT4, sy-vline,
  WA_BDL_TYPE-LANG, sy-vline,
  WA_BDL_TYPE-PREC, sy-vline,
  WA_BDL_TYPE-TIMS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BDL_TYPE 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_BDL_TYPE 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_BDL_TYPE INTO WA_BDL_TYPE.


*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_BDL_TYPE_STR, 
ACCP TYPE STRING,
CLNT TYPE STRING,
CUKY TYPE STRING,
DATS TYPE STRING,
FLTP TYPE STRING,
INT1 TYPE STRING,
INT2 TYPE STRING,
INT4 TYPE STRING,
LANG TYPE STRING,
PREC TYPE STRING,
TIMS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BDL_TYPE_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_BDL_TYPE_STR-ACCP sy-vline 
WA_BDL_TYPE_STR-CLNT sy-vline 
WA_BDL_TYPE_STR-CUKY sy-vline 
WA_BDL_TYPE_STR-DATS sy-vline 
WA_BDL_TYPE_STR-FLTP sy-vline 
WA_BDL_TYPE_STR-INT1 sy-vline 
WA_BDL_TYPE_STR-INT2 sy-vline 
WA_BDL_TYPE_STR-INT4 sy-vline 
WA_BDL_TYPE_STR-LANG sy-vline 
WA_BDL_TYPE_STR-PREC sy-vline 
WA_BDL_TYPE_STR-TIMS sy-vline      INTO ld_text SEPARATED BY SPACE.

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