If you use the INDEXES or INDICES option, Oracle Rdb displays a
    chart with five columns that consists of:

    o  The number of levels in the B-tree needed to store all the
       index nodes.

    o  The total number of B-tree nodes in the index.

    o  The length (number of bytes) used for the index.

    o  The number of duplicate values in the index. This value is
       always zero in an index defined with the DUPLICATES ARE NOT
       ALLOWED clause.

    o  Any duplicate length used.