On Wed, Jul 26, 2017 at 11:08 AM, Rafia Sabih <rafia.sa...@enterprisedb.com> wrote: > > > On Wed, Jul 26, 2017 at 11:06 AM, Ashutosh Bapat > <ashutosh.ba...@enterprisedb.com> wrote: >> >> On Wed, Jul 26, 2017 at 11:00 AM, Rafia Sabih >> <rafia.sa...@enterprisedb.com> wrote: >> > >> > >> > On Wed, Jul 26, 2017 at 10:58 AM, Ashutosh Bapat >> > <ashutosh.ba...@enterprisedb.com> wrote: >> >> >> >> On Tue, Jul 25, 2017 at 11:01 AM, Rafia Sabih >> >> <rafia.sa...@enterprisedb.com> wrote: >> >> >> >> > Query plans for the above mentioned queries is attached. >> >> > >> >> >> >> Can you please share plans for all the queries, even if they haven't >> >> chosen partition-wise join when run on partitioned tables with >> >> enable_partition_wise_join ON? Also, please include the query in >> >> explain analyze output using -a or -e flats to psql. That way we will >> >> have query and its plan in the same file for ready reference. >> >> >> > I didn't run the query not using partition-wise join, for now. >> >> parse-parse error, sorry. Do you mean, you haven't run the queries >> which do not use partition-wise join? >> > Yes, that's what I mean.
Ok. If those queries have equi-join between partitioned tables and are not picking up partition-wise join, that case needs to be investigated. Q21 for example has join between three lineitem instances. Those joins can be executed by partition-wise join. But it may so happen that optimal join order doesn't join partitioned tables with each other, thus interleaving partitioned tables with unpartitioned or differently partitioned tables in join order. Partition-wise join is not possible then. A different partitioning scheme may be required there. -- Best Wishes, Ashutosh Bapat EnterpriseDB Corporation The Postgres Database Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
