Re: Partitioned tables - planner wont use indexes

> I tried removing the index from the part_master table and got the same
> result

Since all the data is in the partitions, the part_master table is empty,
so the index is not useful for your query.

> myDB=# explain SELECT min(logdate) FROM part_master;

Proposals :

1- Use plpgsql to parse the system catalogs, get the list of partitions,
and issue a min() query against each
2- Since dates tend to be incrementing, I guess the minimum date must not
be changing that often (unless you delete rows) ; therefore if you need
that information often I suggest a trigger that updates a separate table
which keeps the min_date (perhaps global or for each client, you choose).