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Component Operator for Internal Tables

This example demonstrates the component operator for internal tables.

Other versions: 7.31 | 7.40 | 7.54

Source Code

    out = cl_demo_output=>new( ).
    fill_tables( ).
    out->begin_section( `itab1` ).
    display_table1( ).
    out->next_section( `itab2` ).
    display_table2( ).

    DATA(base) = itab2.

    out->begin_section(
      `CORRESPONDING itab2( itab1 )` ).

    itab2 = CORRESPONDING #( itab1 ).

    display_table2( ).
    out->next_section(
      `CORRESPONDING itab2( BASE ( itab2 ) itab1 )` ).

    itab2 = CORRESPONDING #( BASE ( base ) itab1 ).

    display_table2( ).
    out->next_section(
      `CORRESPONDING itab2( DEEP itab1 )` ).

    itab2 = CORRESPONDING #( DEEP itab1 ).

    display_table2( ).
    out->next_section(
      `CORRESPONDING itab2( DEEP BASE ( itab2 ) itab1 )` ).

    itab2 = CORRESPONDING #( DEEP BASE ( base ) itab1 ).

    display_table2( ).
    out->display( ).

Description

This example uses the same internal tables as the example for MOVE-CORRESPONDING. Here, the source table itab1 is used as a parameter of a constructor expression with the component operator CORRESPONDING and the result is assigned to the target table itab2. The source table itab1 is assigned to the result with the type of itab2, both with and without the addition DEEP. If the addition BASE is used, the result is given the original value of itab2 as its start value and otherwise stays initial. The assignment is made exactly as described in the example for MOVE-CORRESPONDING with or without EXPANDING NESTED TABLES. The component selector with the addition BASE has the same effect as using MOVE-CORRESPONDING with the addition KEEPING TARGET LINES. If DEEP is used the name comparison is made for the components of the substructure col3. This is why fewer assignments are made than when omitting DEEP.

The uninvolved component col4 keeps its initial value in the new rows in both examples. The result is assigned to the target table itab2. Unlike in the example for structures, the final results for MOVE-CORRESPONDING and the component selector CORRESPONDING are the same, since assignments are made to initial new rows in both cases.