ABAP Select data from SAP table WDY_MD_COMPONENT_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_COMPONENT_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_COMPONENT_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_COMPONENT_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_COMPONENT_META_DATA TYPE STANDARD TABLE OF WDY_MD_COMPONENT_META_DATA,
      WA_WDY_MD_COMPONENT_META_DATA TYPE WDY_MD_COMPONENT_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_COMPONENT_META_DATA> TYPE WDY_MD_COMPONENT_META_DATA.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WDY_MD_COMPONENT_META_DATA
*  INTO TABLE @DATA(IT_WDY_MD_COMPONENT_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_COMPONENT_META_DATA INDEX 1 INTO DATA(WA_WDY_MD_COMPONENT_META_DATA2).


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

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

ENDLOOP.

LOOP AT IT_WDY_MD_COMPONENT_META_DATA INTO WA_WDY_MD_COMPONENT_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_COMPONENT_META_DATA-CONFIG_CTLR, sy-vline,
  WA_WDY_MD_COMPONENT_META_DATA-CMP_INTERFACE, sy-vline,
  WA_WDY_MD_COMPONENT_META_DATA-DISPLAY_NAME, sy-vline,
  WA_WDY_MD_COMPONENT_META_DATA-MODULE_POOL_NAME, sy-vline,
  WA_WDY_MD_COMPONENT_META_DATA-AUTHOR, sy-vline,
  WA_WDY_MD_COMPONENT_META_DATA-CREATEDON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WDY_MD_COMPONENT_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_COMPONENT_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_COMPONENT_META_DATA INTO WA_WDY_MD_COMPONENT_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_COMPONENT_META_DATA_STR, 
DEFINITION TYPE STRING,
COMPONENT_NAME TYPE STRING,
VERSION TYPE STRING,
TYPE TYPE STRING,
CMP_CONTROLLER TYPE STRING,
CONFIG_CTLR TYPE STRING,
CMP_INTERFACE TYPE STRING,
DISPLAY_NAME TYPE STRING,
MODULE_POOL_NAME TYPE STRING,
AUTHOR TYPE STRING,
CREATEDON TYPE STRING,
CHANGEDBY TYPE STRING,
CHANGEDON TYPE STRING,
GENDATE TYPE STRING,
GENTIME TYPE STRING,
NO_ACC_CHECKS TYPE STRING,
CONFIG_EDITOR TYPE STRING,
CONFIG_HIDDEN TYPE STRING,
CONFIG_EXPL_PROP TYPE STRING,
CONFIG_IMPL_PROP TYPE STRING,
P13N_EXPL_PROP TYPE STRING,
P13N_IMPL_PROP TYPE STRING,
ADDITIONAL_PROPS TYPE STRING,
CAN_HDL_VARIANTS TYPE STRING,
ASSISTANCE_CLASS TYPE STRING,
DESCRIPTIONS TYPE STRING,
COMPONENT_USAGES TYPE STRING,
WINDOWS TYPE STRING,
WINDOW_TEXTS TYPE STRING,
NAVIGATION_LINKS TYPE STRING,
NAVIGATION_TARGET_REFS TYPE STRING,
VSH_NODES TYPE STRING,
VSH_PLACEHOLDERS TYPE STRING,
VIEWSET_PROPERTIES TYPE STRING,
INTERFACE_IMPLEMENTINGS TYPE STRING,
LIBRARY_USAGES TYPE STRING,
EXT_CTLR_USAGES TYPE STRING,
EXT_CTX_MAPPINGS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WDY_MD_COMPONENT_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_COMPONENT_META_DATA_STR-DEFINITION sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-COMPONENT_NAME sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-VERSION sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-TYPE sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-CMP_CONTROLLER sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-CONFIG_CTLR sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-CMP_INTERFACE sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-DISPLAY_NAME sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-MODULE_POOL_NAME sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-AUTHOR sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-CREATEDON sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-CHANGEDBY sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-CHANGEDON sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-GENDATE sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-GENTIME sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-NO_ACC_CHECKS sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-CONFIG_EDITOR sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-CONFIG_HIDDEN sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-CONFIG_EXPL_PROP sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-CONFIG_IMPL_PROP sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-P13N_EXPL_PROP sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-P13N_IMPL_PROP sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-ADDITIONAL_PROPS sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-CAN_HDL_VARIANTS sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-ASSISTANCE_CLASS sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-DESCRIPTIONS sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-COMPONENT_USAGES sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-WINDOWS sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-WINDOW_TEXTS sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-NAVIGATION_LINKS sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-NAVIGATION_TARGET_REFS sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-VSH_NODES sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-VSH_PLACEHOLDERS sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-VIEWSET_PROPERTIES sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-INTERFACE_IMPLEMENTINGS sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-LIBRARY_USAGES sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-EXT_CTLR_USAGES sy-vline 
WA_WDY_MD_COMPONENT_META_DATA_STR-EXT_CTX_MAPPINGS sy-vline      INTO ld_text SEPARATED BY SPACE.

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