ABAP Select data from SAP table CGHOPRODNNTWK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CGHOPRODNNTWK
*  INTO TABLE @DATA(IT_CGHOPRODNNTWK2).
*--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_CGHOPRODNNTWK INDEX 1 INTO DATA(WA_CGHOPRODNNTWK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CGHOPRODNNTWK>-MANDT = 1.
<CGHOPRODNNTWK>-PRODUCTIONNETWORKID = 1.
<CGHOPRODNNTWK>-PRODUCTIONNETWORKISFAVORITE = 1.
<CGHOPRODNNTWK>-NTWKOBJALTERNATENAME = 1.
<CGHOPRODNNTWK>-GHONTWKOBJALTERNATENAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CGHOPRODNNTWK-NETWORKINTERNALID, sy-vline,
  WA_CGHOPRODNNTWK-PRODUCTIONNETWORKDESCRIPTION, sy-vline,
  WA_CGHOPRODNNTWK-NETWORKOBJECTTYPE, sy-vline,
  WA_CGHOPRODNNTWK-NETWORKOBJECTTYPEDESCRIPTION, sy-vline,
  WA_CGHOPRODNNTWK-COUNTRY, sy-vline,
  WA_CGHOPRODNNTWK-COUNTRYNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CGHOPRODNNTWK 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_CGHOPRODNNTWK 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_CGHOPRODNNTWK INTO WA_CGHOPRODNNTWK.


*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 TPLNR, internal->external for field PRODUCTIONNETWORKID
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_CGHOPRODNNTWK-PRODUCTIONNETWORKID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CGHOPRODNNTWK-PRODUCTIONNETWORKID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TPLNR, internal->external for field ASSIGNEDTOPRODNNETWORK
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_CGHOPRODNNTWK-ASSIGNEDTOPRODNNETWORK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CGHOPRODNNTWK-ASSIGNEDTOPRODNNETWORK.
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_CGHOPRODNNTWK_STR, 
MANDT TYPE STRING,
PRODUCTIONNETWORKID TYPE STRING,
PRODUCTIONNETWORKISFAVORITE TYPE STRING,
NTWKOBJALTERNATENAME TYPE STRING,
GHONTWKOBJALTERNATENAME TYPE STRING,
NETWORKINTERNALID TYPE STRING,
PRODUCTIONNETWORKDESCRIPTION TYPE STRING,
NETWORKOBJECTTYPE TYPE STRING,
NETWORKOBJECTTYPEDESCRIPTION TYPE STRING,
COUNTRY TYPE STRING,
COUNTRYNAME TYPE STRING,
REGION TYPE STRING,
REGIONNAME TYPE STRING,
SECONDARYGEOGRLLOCATION TYPE STRING,
SECONDARYGEOGRLLOCATIONNAME TYPE STRING,
NETWORKMEDIUMDESCRIPTION TYPE STRING,
FREQUENCYDESCRIPTION TYPE STRING,
NETWORKTOBEALLOCATED TYPE STRING,
ASSIGNEDTOPRODNNETWORK TYPE STRING,
PRODNNTWKLIFECYCLESTATUSTEXT TYPE STRING,
ELIGIBILITYINDICATION TYPE STRING,
ALTERNATEKEY TYPE STRING,
ALTERNATELABELINGSYSTEM TYPE STRING,
MAINTENANCEPLANNERGROUP TYPE STRING,
MAINTENANCEPLANNINGPLANT TYPE STRING,
MAINTENANCEPLANT TYPE STRING,
NETWORKLASTCHANGEDDATETIME TYPE STRING,
ERRORALERTID TYPE STRING,
VARIABLEDATASTATUSTEXT TYPE STRING,
LIFECYCLEDATASTATUSTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CGHOPRODNNTWK_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_CGHOPRODNNTWK_STR-MANDT sy-vline 
WA_CGHOPRODNNTWK_STR-PRODUCTIONNETWORKID sy-vline 
WA_CGHOPRODNNTWK_STR-PRODUCTIONNETWORKISFAVORITE sy-vline 
WA_CGHOPRODNNTWK_STR-NTWKOBJALTERNATENAME sy-vline 
WA_CGHOPRODNNTWK_STR-GHONTWKOBJALTERNATENAME sy-vline 
WA_CGHOPRODNNTWK_STR-NETWORKINTERNALID sy-vline 
WA_CGHOPRODNNTWK_STR-PRODUCTIONNETWORKDESCRIPTION sy-vline 
WA_CGHOPRODNNTWK_STR-NETWORKOBJECTTYPE sy-vline 
WA_CGHOPRODNNTWK_STR-NETWORKOBJECTTYPEDESCRIPTION sy-vline 
WA_CGHOPRODNNTWK_STR-COUNTRY sy-vline 
WA_CGHOPRODNNTWK_STR-COUNTRYNAME sy-vline 
WA_CGHOPRODNNTWK_STR-REGION sy-vline 
WA_CGHOPRODNNTWK_STR-REGIONNAME sy-vline 
WA_CGHOPRODNNTWK_STR-SECONDARYGEOGRLLOCATION sy-vline 
WA_CGHOPRODNNTWK_STR-SECONDARYGEOGRLLOCATIONNAME sy-vline 
WA_CGHOPRODNNTWK_STR-NETWORKMEDIUMDESCRIPTION sy-vline 
WA_CGHOPRODNNTWK_STR-FREQUENCYDESCRIPTION sy-vline 
WA_CGHOPRODNNTWK_STR-NETWORKTOBEALLOCATED sy-vline 
WA_CGHOPRODNNTWK_STR-ASSIGNEDTOPRODNNETWORK sy-vline 
WA_CGHOPRODNNTWK_STR-PRODNNTWKLIFECYCLESTATUSTEXT sy-vline 
WA_CGHOPRODNNTWK_STR-ELIGIBILITYINDICATION sy-vline 
WA_CGHOPRODNNTWK_STR-ALTERNATEKEY sy-vline 
WA_CGHOPRODNNTWK_STR-ALTERNATELABELINGSYSTEM sy-vline 
WA_CGHOPRODNNTWK_STR-MAINTENANCEPLANNERGROUP sy-vline 
WA_CGHOPRODNNTWK_STR-MAINTENANCEPLANNINGPLANT sy-vline 
WA_CGHOPRODNNTWK_STR-MAINTENANCEPLANT sy-vline 
WA_CGHOPRODNNTWK_STR-NETWORKLASTCHANGEDDATETIME sy-vline 
WA_CGHOPRODNNTWK_STR-ERRORALERTID sy-vline 
WA_CGHOPRODNNTWK_STR-VARIABLEDATASTATUSTEXT sy-vline 
WA_CGHOPRODNNTWK_STR-LIFECYCLEDATASTATUSTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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