ABAP Select data from SAP table UGMD_BDTHEAD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM UGMD_BDTHEAD
*  INTO TABLE @DATA(IT_UGMD_BDTHEAD2).
*--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_UGMD_BDTHEAD INDEX 1 INTO DATA(WA_UGMD_BDTHEAD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<UGMD_BDTHEAD>-AKTYP = 1.
<UGMD_BDTHEAD>-RLTP1 = 1.
<UGMD_BDTHEAD>-RLTP2 = 1.
<UGMD_BDTHEAD>-RLTP3 = 1.
<UGMD_BDTHEAD>-RLTP4 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_UGMD_BDTHEAD-RLTP5, sy-vline,
  WA_UGMD_BDTHEAD-RLTP6, sy-vline,
  WA_UGMD_BDTHEAD-RLTP7, sy-vline,
  WA_UGMD_BDTHEAD-RLTP8, sy-vline,
  WA_UGMD_BDTHEAD-RLTP9, sy-vline,
  WA_UGMD_BDTHEAD-APPLICATION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_UGMD_BDTHEAD 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_UGMD_BDTHEAD 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_UGMD_BDTHEAD INTO WA_UGMD_BDTHEAD.


*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_UGMD_BDTHEAD_STR, 
AKTYP TYPE STRING,
RLTP1 TYPE STRING,
RLTP2 TYPE STRING,
RLTP3 TYPE STRING,
RLTP4 TYPE STRING,
RLTP5 TYPE STRING,
RLTP6 TYPE STRING,
RLTP7 TYPE STRING,
RLTP8 TYPE STRING,
RLTP9 TYPE STRING,
APPLICATION TYPE STRING,
AREAID TYPE STRING,
FIELDNAME TYPE STRING,
FIELDTYPE TYPE STRING,
SID TYPE STRING,
ROLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_UGMD_BDTHEAD_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_UGMD_BDTHEAD_STR-AKTYP sy-vline 
WA_UGMD_BDTHEAD_STR-RLTP1 sy-vline 
WA_UGMD_BDTHEAD_STR-RLTP2 sy-vline 
WA_UGMD_BDTHEAD_STR-RLTP3 sy-vline 
WA_UGMD_BDTHEAD_STR-RLTP4 sy-vline 
WA_UGMD_BDTHEAD_STR-RLTP5 sy-vline 
WA_UGMD_BDTHEAD_STR-RLTP6 sy-vline 
WA_UGMD_BDTHEAD_STR-RLTP7 sy-vline 
WA_UGMD_BDTHEAD_STR-RLTP8 sy-vline 
WA_UGMD_BDTHEAD_STR-RLTP9 sy-vline 
WA_UGMD_BDTHEAD_STR-APPLICATION sy-vline 
WA_UGMD_BDTHEAD_STR-AREAID sy-vline 
WA_UGMD_BDTHEAD_STR-FIELDNAME sy-vline 
WA_UGMD_BDTHEAD_STR-FIELDTYPE sy-vline 
WA_UGMD_BDTHEAD_STR-SID sy-vline 
WA_UGMD_BDTHEAD_STR-ROLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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