Version 1.5.1 of the PostgreSQL Partition Manager extension (pg_partman) was released with a new constraint management feature. It allows the constraint exclusion feature of PostgreSQL to be applied on columns other than the column used to control the partitioning scheme. When applicable, it can greatly increase the performance of queries against very large partitions sets.
A blog post detailing the feature can be found here - http://www.keithf4.com/managing-constraint-exclusion-in-table-partitioning/ The extension is maintained on github and can be downloaded there or from pgxn. https://github.com/keithf4/pg_partman http://pgxn.org/dist/pg_partman/ -- Keith Fiske Database Administrator OmniTI Computer Consulting, Inc. http://www.keithf4.com
