On Thu, Oct 25, 2018 at 10:43:10AM -0600, Dave E Martin wrote: > If SELECT is confident enough to limit itself to one partition, why isn't > DELETE (or UPDATE)?
Because of this limitation: https://www.postgresql.org/docs/current/static/ddl-partitioning.html#DDL-PARTITION-PRUNING |Currently, pruning of partitions during the planning of an UPDATE or DELETE |command is implemented using the constraint exclusion method (however, it is |controlled by the enable_partition_pruning rather than constraint_exclusion) — |see the following section for details and caveats that apply. Justin
