Re: Auto creation of Partitions

If you know that the constraints on each of the tables is distinct, then
building a UNIQUE index on each of the partitions is sufficient to prove
that all rows in the combined partitioned table are distinct also.

The hard part there is checking that the partition constraints are
distinct. If the partition constraints are added one at a time, you can
use the predicate testing logic to compare the to-be-added partition's
constraint against each of the already added constraints. That becomes
an O(N) problem.

What is really needed is a data structure that allows range partitions
to be accessed more efficiently. This could make adding partitions and
deciding in which partition a specific value goes an O(logN) operation.

--
  Simon Riggs
  EnterpriseDB   http://www.enterprisedb.com