ABAP Select data from SAP table CNVOM_S_LINK_FLAT 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 CNVOM_S_LINK_FLAT 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 CNVOM_S_LINK_FLAT. 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 CNVOM_S_LINK_FLAT 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_CNVOM_S_LINK_FLAT TYPE STANDARD TABLE OF CNVOM_S_LINK_FLAT,
      WA_CNVOM_S_LINK_FLAT TYPE CNVOM_S_LINK_FLAT,
      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: <CNVOM_S_LINK_FLAT> TYPE CNVOM_S_LINK_FLAT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNVOM_S_LINK_FLAT
*  INTO TABLE @DATA(IT_CNVOM_S_LINK_FLAT2).
*--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_CNVOM_S_LINK_FLAT INDEX 1 INTO DATA(WA_CNVOM_S_LINK_FLAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNVOM_S_LINK_FLAT>-WS_GUID = 1.
<CNVOM_S_LINK_FLAT>-STRLINK_GUID = 1.
<CNVOM_S_LINK_FLAT>-WSPOS_LINK = 1.
<CNVOM_S_LINK_FLAT>-LEVEL = 1.
<CNVOM_S_LINK_FLAT>-SEQNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNVOM_S_LINK_FLAT-SRC_BO_GUID, sy-vline,
  WA_CNVOM_S_LINK_FLAT-SRC_DMOD_GUID, sy-vline,
  WA_CNVOM_S_LINK_FLAT-SRC_TABLE, sy-vline,
  WA_CNVOM_S_LINK_FLAT-TABID_SRC, sy-vline,
  WA_CNVOM_S_LINK_FLAT-WSPOS_SRC, sy-vline,
  WA_CNVOM_S_LINK_FLAT-TGT_BO_GUID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNVOM_S_LINK_FLAT 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_CNVOM_S_LINK_FLAT 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_CNVOM_S_LINK_FLAT INTO WA_CNVOM_S_LINK_FLAT.


*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_CNVOM_S_LINK_FLAT_STR, 
WS_GUID TYPE STRING,
STRLINK_GUID TYPE STRING,
WSPOS_LINK TYPE STRING,
LEVEL TYPE STRING,
SEQNO TYPE STRING,
SRC_BO_GUID TYPE STRING,
SRC_DMOD_GUID TYPE STRING,
SRC_TABLE TYPE STRING,
TABID_SRC TYPE STRING,
WSPOS_SRC TYPE STRING,
TGT_BO_GUID TYPE STRING,
TGT_DMOD_GUID TYPE STRING,
TGT_TABLE TYPE STRING,
TABID_TGT TYPE STRING,
WSPOS_TGT TYPE STRING,
MC_ALLOWED TYPE STRING,
HEADTABLE TYPE STRING,
HEADSTRUCT TYPE STRING,
FLG_EXTERNAL TYPE STRING,
DMC_STREE_GUID TYPE STRING,
DMC_STREE_IDENT TYPE STRING,
DMC_PARENT_STREE_IDENT TYPE STRING,
FLG_INACTIVE TYPE STRING,
ADD_HEADER TYPE STRING,
REGISTER_HEADER TYPE STRING,
FLG_ROOT TYPE STRING,
FLG_EXEC_STATEMENT TYPE STRING,
FLG_EXEC_NATIVE TYPE STRING,
FLG_SKIP_SELECT TYPE STRING,
TABLE_ALIAS TYPE STRING,
FILTER_TABLE TYPE STRING,
TABCLASS TYPE STRING,
SQLTAB TYPE STRING,
ROOT_TABID TYPE STRING,
BRANCH_TABID TYPE STRING,
LINK_TYPE TYPE STRING,
SRC_TABLE_TYPE TYPE STRING,
TGT_TABLE_TYPE TYPE STRING,
FLG_INCR_EXEC_REGULAR TYPE STRING,
FLG_INCR_EXEC_FILTER TYPE STRING,
RCV_TABLE TYPE STRING,
APPL_INSERT TYPE STRING,
READONLY TYPE STRING,
RCV_TABLE_SIM TYPE STRING,
COL_WSPOS TYPE STRING,
COL_TABID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNVOM_S_LINK_FLAT_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_CNVOM_S_LINK_FLAT_STR-WS_GUID sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-STRLINK_GUID sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-WSPOS_LINK sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-LEVEL sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-SEQNO sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-SRC_BO_GUID sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-SRC_DMOD_GUID sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-SRC_TABLE sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-TABID_SRC sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-WSPOS_SRC sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-TGT_BO_GUID sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-TGT_DMOD_GUID sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-TGT_TABLE sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-TABID_TGT sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-WSPOS_TGT sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-MC_ALLOWED sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-HEADTABLE sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-HEADSTRUCT sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-FLG_EXTERNAL sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-DMC_STREE_GUID sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-DMC_STREE_IDENT sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-DMC_PARENT_STREE_IDENT sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-FLG_INACTIVE sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-ADD_HEADER sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-REGISTER_HEADER sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-FLG_ROOT sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-FLG_EXEC_STATEMENT sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-FLG_EXEC_NATIVE sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-FLG_SKIP_SELECT sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-TABLE_ALIAS sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-FILTER_TABLE sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-TABCLASS sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-SQLTAB sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-ROOT_TABID sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-BRANCH_TABID sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-LINK_TYPE sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-SRC_TABLE_TYPE sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-TGT_TABLE_TYPE sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-FLG_INCR_EXEC_REGULAR sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-FLG_INCR_EXEC_FILTER sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-RCV_TABLE sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-APPL_INSERT sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-READONLY sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-RCV_TABLE_SIM sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-COL_WSPOS sy-vline 
WA_CNVOM_S_LINK_FLAT_STR-COL_TABID sy-vline      INTO ld_text SEPARATED BY SPACE.

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