ABAP Select data from SAP table BHDGD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BHDGD
*  INTO TABLE @DATA(IT_BHDGD2).
*--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_BHDGD INDEX 1 INTO DATA(WA_BHDGD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BHDGD>-LINE1 = 1.
<BHDGD>-LINE2 = 1.
<BHDGD>-LINES = 1.
<BHDGD>-BUKRS = 1.
<BHDGD>-REPID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BHDGD-UNAME, sy-vline,
  WA_BHDGD-INIFL, sy-vline,
  WA_BHDGD-MIFFL, sy-vline,
  WA_BHDGD-MANDT, sy-vline,
  WA_BHDGD-DATUM, sy-vline,
  WA_BHDGD-ZEIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BHDGD 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_BHDGD 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_BHDGD INTO WA_BHDGD.


*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_BHDGD_STR, 
LINE1 TYPE STRING,
LINE2 TYPE STRING,
LINES TYPE STRING,
BUKRS TYPE STRING,
REPID TYPE STRING,
UNAME TYPE STRING,
INIFL TYPE STRING,
MIFFL TYPE STRING,
MANDT TYPE STRING,
DATUM TYPE STRING,
ZEIT TYPE STRING,
REPIF TYPE STRING,
SEQNO TYPE STRING,
REQST TYPE STRING,
GRPIN TYPE STRING,
SEPAR TYPE STRING,
DOMAI TYPE STRING,
WERTE TYPE STRING,
START_PAGNO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BHDGD_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_BHDGD_STR-LINE1 sy-vline 
WA_BHDGD_STR-LINE2 sy-vline 
WA_BHDGD_STR-LINES sy-vline 
WA_BHDGD_STR-BUKRS sy-vline 
WA_BHDGD_STR-REPID sy-vline 
WA_BHDGD_STR-UNAME sy-vline 
WA_BHDGD_STR-INIFL sy-vline 
WA_BHDGD_STR-MIFFL sy-vline 
WA_BHDGD_STR-MANDT sy-vline 
WA_BHDGD_STR-DATUM sy-vline 
WA_BHDGD_STR-ZEIT sy-vline 
WA_BHDGD_STR-REPIF sy-vline 
WA_BHDGD_STR-SEQNO sy-vline 
WA_BHDGD_STR-REQST sy-vline 
WA_BHDGD_STR-GRPIN sy-vline 
WA_BHDGD_STR-SEPAR sy-vline 
WA_BHDGD_STR-DOMAI sy-vline 
WA_BHDGD_STR-WERTE sy-vline 
WA_BHDGD_STR-START_PAGNO sy-vline      INTO ld_text SEPARATED BY SPACE.

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