Getting internal table information at runtime

[Former Member]

Hi All

I am trying to create a method that will automatically create a field catalog based on INTERNAL TABLE input. I have found the following for determining components within a database structure. I am wondering if there is a equivalent for internal tables?

Does anyone know if there is a function/method available to automatically create a field catalog based on lvc_t_fcat? Yes I know there is the REUSE_ALV_FIELDCATALOG_MERGE but this only works for FM ALV. I have thought about wrapping this function but would prefer to do it the 'tricky' way.

DATA table_descr TYPE REF TO cl_abap_tabledescr.

  DATA struct_descr TYPE REF TO cl_abap_structdescr.

  DATA columns TYPE abap_compdescr_tab.

  table_descr ?= cl_abap_typedescr=>describe_by_data( itab ).

  struct_descr ?= table_descr->get_table_line_type( ).

  columns = struct_descr->components.

[Former Member]

Hi Brad,

What you have written above will work well for determining the components of an Internal table.

If what you need is to create a LVC fieldcatalog from an Internal table, you can go through this link.

http://wiki.sdn.sap.com/wiki/display/Snippets/Creating+LVC+fieldcatalog+Using+Internal+table+through...

Use LVC_TRANSFER_FROM_SLIS after using REUSE_ALV_FIELDCATALOG_MERGE to convert.

Thanks,

Shambu

[yogendra_bhaskar]

HI Brad ,

Have a look on following code , this may help you :

*&---------------------------------------------------------------------*

*&      Form  get_lvc_t_fcat_4_itab

*&---------------------------------------------------------------------*

*       text

*----------------------------------------------------------------------*

*      -->IT_TABLE   text

*      -->RT_FCAT    text

*----------------------------------------------------------------------*

FORM get_lvc_t_fcat_4_itab USING it_table CHANGING rt_fcat.

*Importing  IT_TABLE  TYPE TABLE

*Returning  VALUE( RT_FCAT )  TYPE LVC_T_FCAT

   DATA:

     lo_columns                  TYPE REF TO cl_salv_columns_table,

     lo_aggregations             TYPE REF TO cl_salv_aggregations,

     lo_salv_table               TYPE REF TO cl_salv_table,

     lr_table                    TYPE REF TO data.

   FIELD-SYMBOLS:

     <table>         TYPE STANDARD TABLE.

* create unprotected table from import data

   CREATE DATA lr_table LIKE it_table.

   ASSIGN lr_table->* TO <table>.

*...New SALV Instance ...............................................

   TRY.

       cl_salv_table=>factory(

         EXPORTING

           list_display = abap_false

         IMPORTING

           r_salv_table = lo_salv_table

         CHANGING

           t_table      = <table> ).

     CATCH cx_salv_msg.                                  "#EC NO_HANDLER

   ENDTRY.

* get columns object (raw fieldcatalog)

   lo_columns  = lo_salv_table->get_columns( ).

* get aggregationss object (sorts)

   lo_aggregations = lo_salv_table->get_aggregations( ).

   rt_fcat =

     cl_salv_controller_metadata=>get_lvc_fieldcatalog(

       r_columns             = lo_columns

       r_aggregations        = lo_aggregations ).

ENDFORM.                    "get_lvc_t_fcat_4_itab

Thanx n Regards,

Yogendra Bhaskar

[janewar]

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