can easily lead to excessive numbers of partitions,
    so restraint is advisable.
   </p><p>
    It is important to consider the overhead of partitioning during
    query planning and execution.  The query planner is generally able to
    handle partition hierarchies with up to a few thousand partitions fairly
    well, provided that typical queries allow the query planner to prune all
    but a small number of partitions.  Planning times become longer and memory
    consumption becomes higher when more pa