.. change::
    :tags: usecase, sql
    :tickets: 527

    The :meth:`.Index.create` and :meth:`.Index.drop` methods now have a
    parameter :paramref:`.Index.create.checkfirst`, in the same way as that of
    :class:`.Table` and :class:`.Sequence`, which when enabled will cause the
    operation to detect if the index exists (or not) before performing a create
    or drop operation.

