ABAP Select data from SAP table DMC_V_SND_STRUCT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DMC_V_SND_STRUCT
*  INTO TABLE @DATA(IT_DMC_V_SND_STRUCT2).
*--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_DMC_V_SND_STRUCT INDEX 1 INTO DATA(WA_DMC_V_SND_STRUCT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DMC_V_SND_STRUCT>-COBJ_GUID = 1.
<DMC_V_SND_STRUCT>-CONTAINER_GUID = 1.
<DMC_V_SND_STRUCT>-STREE_GUID = 1.
<DMC_V_SND_STRUCT>-STREE_STYPE = 1.
<DMC_V_SND_STRUCT>-STRUCT_GUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DMC_V_SND_STRUCT-FDDIC, sy-vline,
  WA_DMC_V_SND_STRUCT-DDICNAME, sy-vline,
  WA_DMC_V_SND_STRUCT-TABCLASS, sy-vline,
  WA_DMC_V_SND_STRUCT-IDENT, sy-vline,
  WA_DMC_V_SND_STRUCT-CHNAM, sy-vline,
  WA_DMC_V_SND_STRUCT-CHANGEDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DMC_V_SND_STRUCT 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_DMC_V_SND_STRUCT 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_DMC_V_SND_STRUCT INTO WA_DMC_V_SND_STRUCT.


*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_DMC_V_SND_STRUCT_STR, 
COBJ_GUID TYPE STRING,
CONTAINER_GUID TYPE STRING,
STREE_GUID TYPE STRING,
STREE_STYPE TYPE STRING,
STRUCT_GUID TYPE STRING,
FDDIC TYPE STRING,
DDICNAME TYPE STRING,
TABCLASS TYPE STRING,
IDENT TYPE STRING,
CHNAM TYPE STRING,
CHANGEDATE TYPE STRING,
VERSIO TYPE STRING,
AUTHOR TYPE STRING,
CREATEDATE TYPE STRING,
DESCR TYPE STRING,
AS4TIME TYPE STRING,
AS4DATE TYPE STRING,
TECHNICAL TYPE STRING,
USES_STRINGS TYPE STRING,
APPL_INSERT TYPE STRING,
READONLY TYPE STRING,
UC_CODEPAGE TYPE STRING,
TYPING_CLASS TYPE STRING,
USES_LRAW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DMC_V_SND_STRUCT_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_DMC_V_SND_STRUCT_STR-COBJ_GUID sy-vline 
WA_DMC_V_SND_STRUCT_STR-CONTAINER_GUID sy-vline 
WA_DMC_V_SND_STRUCT_STR-STREE_GUID sy-vline 
WA_DMC_V_SND_STRUCT_STR-STREE_STYPE sy-vline 
WA_DMC_V_SND_STRUCT_STR-STRUCT_GUID sy-vline 
WA_DMC_V_SND_STRUCT_STR-FDDIC sy-vline 
WA_DMC_V_SND_STRUCT_STR-DDICNAME sy-vline 
WA_DMC_V_SND_STRUCT_STR-TABCLASS sy-vline 
WA_DMC_V_SND_STRUCT_STR-IDENT sy-vline 
WA_DMC_V_SND_STRUCT_STR-CHNAM sy-vline 
WA_DMC_V_SND_STRUCT_STR-CHANGEDATE sy-vline 
WA_DMC_V_SND_STRUCT_STR-VERSIO sy-vline 
WA_DMC_V_SND_STRUCT_STR-AUTHOR sy-vline 
WA_DMC_V_SND_STRUCT_STR-CREATEDATE sy-vline 
WA_DMC_V_SND_STRUCT_STR-DESCR sy-vline 
WA_DMC_V_SND_STRUCT_STR-AS4TIME sy-vline 
WA_DMC_V_SND_STRUCT_STR-AS4DATE sy-vline 
WA_DMC_V_SND_STRUCT_STR-TECHNICAL sy-vline 
WA_DMC_V_SND_STRUCT_STR-USES_STRINGS sy-vline 
WA_DMC_V_SND_STRUCT_STR-APPL_INSERT sy-vline 
WA_DMC_V_SND_STRUCT_STR-READONLY sy-vline 
WA_DMC_V_SND_STRUCT_STR-UC_CODEPAGE sy-vline 
WA_DMC_V_SND_STRUCT_STR-TYPING_CLASS sy-vline 
WA_DMC_V_SND_STRUCT_STR-USES_LRAW sy-vline      INTO ld_text SEPARATED BY SPACE.

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