ABAP Select data from SAP table DMC_S_RTO_MD_CNNODE into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP DMC_S_RTO_MD_CNNODE 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_S_RTO_MD_CNNODE. 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_S_RTO_MD_CNNODE 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_S_RTO_MD_CNNODE TYPE STANDARD TABLE OF DMC_S_RTO_MD_CNNODE,
      WA_DMC_S_RTO_MD_CNNODE TYPE DMC_S_RTO_MD_CNNODE,
      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_S_RTO_MD_CNNODE> TYPE DMC_S_RTO_MD_CNNODE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DMC_S_RTO_MD_CNNODE
*  INTO TABLE @DATA(IT_DMC_S_RTO_MD_CNNODE2).
*--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_S_RTO_MD_CNNODE INDEX 1 INTO DATA(WA_DMC_S_RTO_MD_CNNODE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DMC_S_RTO_MD_CNNODE>-SEQNUM = 1.
<DMC_S_RTO_MD_CNNODE>-STRUCNAME = 1.
<DMC_S_RTO_MD_CNNODE>-DDICNAME = 1.
<DMC_S_RTO_MD_CNNODE>-STRUCLEVEL = 1.
<DMC_S_RTO_MD_CNNODE>-PARENT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DMC_S_RTO_MD_CNNODE-GUIDSTREE, sy-vline,
  WA_DMC_S_RTO_MD_CNNODE-GUIDSTRUCT, sy-vline,
  WA_DMC_S_RTO_MD_CNNODE-FDDIC, sy-vline,
  WA_DMC_S_RTO_MD_CNNODE-APPL_INSERT, sy-vline,
  WA_DMC_S_RTO_MD_CNNODE-READONLY, sy-vline,
  WA_DMC_S_RTO_MD_CNNODE-USES_STRINGS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DMC_S_RTO_MD_CNNODE 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_S_RTO_MD_CNNODE 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_S_RTO_MD_CNNODE INTO WA_DMC_S_RTO_MD_CNNODE.


*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_S_RTO_MD_CNNODE_STR, 
SEQNUM TYPE STRING,
STRUCNAME TYPE STRING,
DDICNAME TYPE STRING,
STRUCLEVEL TYPE STRING,
PARENT TYPE STRING,
GUIDSTREE TYPE STRING,
GUIDSTRUCT TYPE STRING,
FDDIC TYPE STRING,
APPL_INSERT TYPE STRING,
READONLY TYPE STRING,
USES_STRINGS TYPE STRING,
STREE_TYPE TYPE STRING,
APPL_SELECT TYPE STRING,
APPL_SELECT_PIT TYPE STRING,
APPL_SELECT_INCL TYPE STRING,
APPL_SEL_LOOKUP TYPE STRING,
TABNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DMC_S_RTO_MD_CNNODE_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_S_RTO_MD_CNNODE_STR-SEQNUM sy-vline 
WA_DMC_S_RTO_MD_CNNODE_STR-STRUCNAME sy-vline 
WA_DMC_S_RTO_MD_CNNODE_STR-DDICNAME sy-vline 
WA_DMC_S_RTO_MD_CNNODE_STR-STRUCLEVEL sy-vline 
WA_DMC_S_RTO_MD_CNNODE_STR-PARENT sy-vline 
WA_DMC_S_RTO_MD_CNNODE_STR-GUIDSTREE sy-vline 
WA_DMC_S_RTO_MD_CNNODE_STR-GUIDSTRUCT sy-vline 
WA_DMC_S_RTO_MD_CNNODE_STR-FDDIC sy-vline 
WA_DMC_S_RTO_MD_CNNODE_STR-APPL_INSERT sy-vline 
WA_DMC_S_RTO_MD_CNNODE_STR-READONLY sy-vline 
WA_DMC_S_RTO_MD_CNNODE_STR-USES_STRINGS sy-vline 
WA_DMC_S_RTO_MD_CNNODE_STR-STREE_TYPE sy-vline 
WA_DMC_S_RTO_MD_CNNODE_STR-APPL_SELECT sy-vline 
WA_DMC_S_RTO_MD_CNNODE_STR-APPL_SELECT_PIT sy-vline 
WA_DMC_S_RTO_MD_CNNODE_STR-APPL_SELECT_INCL sy-vline 
WA_DMC_S_RTO_MD_CNNODE_STR-APPL_SEL_LOOKUP sy-vline 
WA_DMC_S_RTO_MD_CNNODE_STR-TABNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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