ABAP Select data from SAP table TDS_LO_VCFG_INST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TDS_LO_VCFG_INST
*  INTO TABLE @DATA(IT_TDS_LO_VCFG_INST2).
*--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_TDS_LO_VCFG_INST INDEX 1 INTO DATA(WA_TDS_LO_VCFG_INST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TDS_LO_VCFG_INST>-ID = 1.
<TDS_LO_VCFG_INST>-PARENT_ID = 1.
<TDS_LO_VCFG_INST>-IS_EXPANDED = 1.
<TDS_LO_VCFG_INST>-IS_LEAF = 1.
<TDS_LO_VCFG_INST>-TEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TDS_LO_VCFG_INST-PARENT, sy-vline,
  WA_TDS_LO_VCFG_INST-INSTANCE, sy-vline,
  WA_TDS_LO_VCFG_INST-ITEM_NUMBER, sy-vline,
  WA_TDS_LO_VCFG_INST-ITEM_IDENT, sy-vline,
  WA_TDS_LO_VCFG_INST-ITEM_CATEGORY, sy-vline,
  WA_TDS_LO_VCFG_INST-OBJECT_CATEGORY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TDS_LO_VCFG_INST 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_TDS_LO_VCFG_INST 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_TDS_LO_VCFG_INST INTO WA_TDS_LO_VCFG_INST.


*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.

*Conversion exit NUMCV, internal->external for field ITEM_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_TDS_LO_VCFG_INST-ITEM_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_LO_VCFG_INST-ITEM_NUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field COMPONENT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_TDS_LO_VCFG_INST-COMPONENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_LO_VCFG_INST-COMPONENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field COMPONENT_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_TDS_LO_VCFG_INST-COMPONENT_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_LO_VCFG_INST-COMPONENT_UNIT.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_TDS_LO_VCFG_INST_STR, 
ID TYPE STRING,
PARENT_ID TYPE STRING,
IS_EXPANDED TYPE STRING,
IS_LEAF TYPE STRING,
TEXT TYPE STRING,
PARENT TYPE STRING,
INSTANCE TYPE STRING,
ITEM_NUMBER TYPE STRING,
ITEM_IDENT TYPE STRING,
ITEM_CATEGORY TYPE STRING,
OBJECT_CATEGORY TYPE STRING,
COMPONENT TYPE STRING,
COMPONENT_T TYPE STRING,
CLASS TYPE STRING,
COMPONENT_QTY TYPE STRING,
COMPONENT_UNIT TYPE STRING,
MASTER_QTY TYPE STRING,
CLASS_TYPE TYPE STRING,
CONFIGURABLE TYPE STRING,
FREE TYPE STRING,
LOCKED TYPE STRING,
INCOMPLETE TYPE STRING,
INCONSISTENT TYPE STRING,
ACTIVE TYPE STRING,
SELECTED TYPE STRING,
SELECTABLE TYPE STRING,
ICON_LOCKED TYPE STRING,
ICON_INCOMPLETE TYPE STRING,
ICON_INCONSISTENT TYPE STRING,
ICON_CONFIGURABLE TYPE STRING,
ICON_ACTIVE TYPE STRING,
CUOBJ TYPE STRING,
TTTEXT_INCOMP TYPE STRING,
TTTEXT_INCONS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TDS_LO_VCFG_INST_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_TDS_LO_VCFG_INST_STR-ID sy-vline 
WA_TDS_LO_VCFG_INST_STR-PARENT_ID sy-vline 
WA_TDS_LO_VCFG_INST_STR-IS_EXPANDED sy-vline 
WA_TDS_LO_VCFG_INST_STR-IS_LEAF sy-vline 
WA_TDS_LO_VCFG_INST_STR-TEXT sy-vline 
WA_TDS_LO_VCFG_INST_STR-PARENT sy-vline 
WA_TDS_LO_VCFG_INST_STR-INSTANCE sy-vline 
WA_TDS_LO_VCFG_INST_STR-ITEM_NUMBER sy-vline 
WA_TDS_LO_VCFG_INST_STR-ITEM_IDENT sy-vline 
WA_TDS_LO_VCFG_INST_STR-ITEM_CATEGORY sy-vline 
WA_TDS_LO_VCFG_INST_STR-OBJECT_CATEGORY sy-vline 
WA_TDS_LO_VCFG_INST_STR-COMPONENT sy-vline 
WA_TDS_LO_VCFG_INST_STR-COMPONENT_T sy-vline 
WA_TDS_LO_VCFG_INST_STR-CLASS sy-vline 
WA_TDS_LO_VCFG_INST_STR-COMPONENT_QTY sy-vline 
WA_TDS_LO_VCFG_INST_STR-COMPONENT_UNIT sy-vline 
WA_TDS_LO_VCFG_INST_STR-MASTER_QTY sy-vline 
WA_TDS_LO_VCFG_INST_STR-CLASS_TYPE sy-vline 
WA_TDS_LO_VCFG_INST_STR-CONFIGURABLE sy-vline 
WA_TDS_LO_VCFG_INST_STR-FREE sy-vline 
WA_TDS_LO_VCFG_INST_STR-LOCKED sy-vline 
WA_TDS_LO_VCFG_INST_STR-INCOMPLETE sy-vline 
WA_TDS_LO_VCFG_INST_STR-INCONSISTENT sy-vline 
WA_TDS_LO_VCFG_INST_STR-ACTIVE sy-vline 
WA_TDS_LO_VCFG_INST_STR-SELECTED sy-vline 
WA_TDS_LO_VCFG_INST_STR-SELECTABLE sy-vline 
WA_TDS_LO_VCFG_INST_STR-ICON_LOCKED sy-vline 
WA_TDS_LO_VCFG_INST_STR-ICON_INCOMPLETE sy-vline 
WA_TDS_LO_VCFG_INST_STR-ICON_INCONSISTENT sy-vline 
WA_TDS_LO_VCFG_INST_STR-ICON_CONFIGURABLE sy-vline 
WA_TDS_LO_VCFG_INST_STR-ICON_ACTIVE sy-vline 
WA_TDS_LO_VCFG_INST_STR-CUOBJ sy-vline 
WA_TDS_LO_VCFG_INST_STR-TTTEXT_INCOMP sy-vline 
WA_TDS_LO_VCFG_INST_STR-TTTEXT_INCONS sy-vline      INTO ld_text SEPARATED BY SPACE.

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