ABAP Select data from SAP table WDY_MD_VIEW_META_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WDY_MD_VIEW_META_DATA
*  INTO TABLE @DATA(IT_WDY_MD_VIEW_META_DATA2).
*--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_WDY_MD_VIEW_META_DATA INDEX 1 INTO DATA(WA_WDY_MD_VIEW_META_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WDY_MD_VIEW_META_DATA>-DEFINITION = 1.
<WDY_MD_VIEW_META_DATA>-COMPONENT_NAME = 1.
<WDY_MD_VIEW_META_DATA>-VIEW_NAME = 1.
<WDY_MD_VIEW_META_DATA>-VERSION = 1.
<WDY_MD_VIEW_META_DATA>-TYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WDY_MD_VIEW_META_DATA-VIEW_TYPE, sy-vline,
  WA_WDY_MD_VIEW_META_DATA-LIFESPAN, sy-vline,
  WA_WDY_MD_VIEW_META_DATA-VIEW_CONTROLLER, sy-vline,
  WA_WDY_MD_VIEW_META_DATA-ROOT_UI_CONT, sy-vline,
  WA_WDY_MD_VIEW_META_DATA-IS_CONVERTED, sy-vline,
  WA_WDY_MD_VIEW_META_DATA-DISPLAY_NAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WDY_MD_VIEW_META_DATA 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_WDY_MD_VIEW_META_DATA 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_WDY_MD_VIEW_META_DATA INTO WA_WDY_MD_VIEW_META_DATA.


*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_WDY_MD_VIEW_META_DATA_STR, 
DEFINITION TYPE STRING,
COMPONENT_NAME TYPE STRING,
VIEW_NAME TYPE STRING,
VERSION TYPE STRING,
TYPE TYPE STRING,
VIEW_TYPE TYPE STRING,
LIFESPAN TYPE STRING,
VIEW_CONTROLLER TYPE STRING,
ROOT_UI_CONT TYPE STRING,
IS_CONVERTED TYPE STRING,
DISPLAY_NAME TYPE STRING,
AUTHOR TYPE STRING,
CREATEDON TYPE STRING,
CHANGEDBY TYPE STRING,
CHANGEDON TYPE STRING,
COMPUSAGE_NAME TYPE STRING,
DEF_ROOT_NODE TYPE STRING,
TITLE TYPE STRING,
HELP_DESCRIPTION TYPE STRING,
HELP_LINK TYPE STRING,
VISIBILITY TYPE STRING,
DESCRIPTIONS TYPE STRING,
VIEW_CONTAINERS TYPE STRING,
VIEW_CONTAINER_TEXTS TYPE STRING,
IOBOUND_PLUGS TYPE STRING,
IOBOUND_PLUG_TEXTS TYPE STRING,
PLUG_PARAMETERS TYPE STRING,
PLUG_PARAMETER_TEXTS TYPE STRING,
UI_ELEMENTS TYPE STRING,
UI_CONTEXT_BINDINGS TYPE STRING,
UI_EVENT_BINDINGS TYPE STRING,
UI_DDIC_BINDINGS TYPE STRING,
UI_PROPERTIES TYPE STRING,
NAVIGATION_LINKS TYPE STRING,
NAVIGATION_TARGET_REFS TYPE STRING,
VSH_NODES TYPE STRING,
VSH_PLACEHOLDERS TYPE STRING,
VIEWSET_PROPERTIES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WDY_MD_VIEW_META_DATA_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_WDY_MD_VIEW_META_DATA_STR-DEFINITION sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-COMPONENT_NAME sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-VIEW_NAME sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-VERSION sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-TYPE sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-VIEW_TYPE sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-LIFESPAN sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-VIEW_CONTROLLER sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-ROOT_UI_CONT sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-IS_CONVERTED sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-DISPLAY_NAME sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-AUTHOR sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-CREATEDON sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-CHANGEDBY sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-CHANGEDON sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-COMPUSAGE_NAME sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-DEF_ROOT_NODE sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-TITLE sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-HELP_DESCRIPTION sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-HELP_LINK sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-VISIBILITY sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-DESCRIPTIONS sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-VIEW_CONTAINERS sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-VIEW_CONTAINER_TEXTS sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-IOBOUND_PLUGS sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-IOBOUND_PLUG_TEXTS sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-PLUG_PARAMETERS sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-PLUG_PARAMETER_TEXTS sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-UI_ELEMENTS sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-UI_CONTEXT_BINDINGS sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-UI_EVENT_BINDINGS sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-UI_DDIC_BINDINGS sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-UI_PROPERTIES sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-NAVIGATION_LINKS sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-NAVIGATION_TARGET_REFS sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-VSH_NODES sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-VSH_PLACEHOLDERS sy-vline 
WA_WDY_MD_VIEW_META_DATA_STR-VIEWSET_PROPERTIES sy-vline      INTO ld_text SEPARATED BY SPACE.

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