Re: Partitioned tables - planner wont use indexes

kevin kempter wrote:
> Hi List;
>
> Sorry if this is a dupe, my first post never showed up...
>
> I'm having some performance issues with a partitioned table. We have a
> VERY large table that we've partitioned by day.
>

Unfortunately, that is the defined behavior in this case. From 5.9.6 of
the manual:

"Constraint exclusion only works when the query's WHERE clause contains
constants."

[Where the constants are of course your partitioning column(s)]

The best way around this depends mostly on what you're up to. You can
get the min tablename from the catalogs, or you can keep a table of
active partitions that your script which drops off old partitions and
generates new ones can keep updated on the oldest/newest partition
dates. Or some number of other solutions, whatever you find cleanest for
your purposes.

Paul