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Creating a Structure Using RTTC

This example demonstrates how a structure is created using RTTC.

Other versions: 7.31 | 7.40 | 7.54

Source Code

    DATA: struct_type TYPE REF TO cl_abap_structdescr,
          dref        TYPE REF TO data,
          oref        TYPE REF TO cx_sy_struct_creation.

    DATA column1 TYPE c LENGTH 30.
    DATA column2 TYPE c LENGTH 30.

    FIELD-SYMBOLS: <struc>  TYPE any,
                   <comp1>  TYPE any,
                   <comp2>  TYPE any.

    cl_demo_input=>add_field( CHANGING field = column1 ).
    cl_demo_input=>add_field( CHANGING field = column2 ).
    cl_demo_input=>request( ).

    column1 = to_upper( column1 ).
    column2 = to_upper( column2 ).

    TRY.
        struct_type = cl_abap_structdescr=>get(
          VALUE #(
            ( name = column1 type = cl_abap_elemdescr=>get_c( 40 ) )
            ( name = column2 type = cl_abap_elemdescr=>get_i( )    )
                 )
                                              ).
        CREATE DATA dref TYPE HANDLE struct_type.
      CATCH cx_sy_struct_creation INTO oref.
        cl_demo_output=>display( oref->get_text( ) ).
        RETURN.
    ENDTRY.

    ASSIGN dref->* TO <struc>.
    ASSIGN COMPONENT column1 OF STRUCTURE <struc> TO <comp1>.
    <comp1> = 'Amount'.

    ASSIGN dref->* TO <struc>.
    ASSIGN COMPONENT column2 OF STRUCTURE <struc> TO <comp2>.
    <comp2> = 11.

    cl_demo_output=>display( |{ column1 WIDTH = 32 } { <comp1> }\n| &
                             |{ column2 WIDTH = 32 } { <comp2> }| ).

Description

Dynamic definition of a structure with two components using the GET method of the CL_ABAP_STRUCTDESCR class. The description of the components of the structure is provided in the internal table comp_tab. If no type description object exists for this structure yet, it is created by the GET method.

The method CHECK_TABLE_NAME_STR of the class CL_ABAP_DYN_PRG checks whether the database table specified exists and can be used.