| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com> |
| Cc: | Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Partitioned tables and relfilenode |
| Date: | 2017-02-15 16:14:59 |
| Message-ID: | CA+TgmoZGtbdJxH947dYC4uQ+PajigN_UCntH0XnXrjtTytA5OQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Wed, Feb 15, 2017 at 2:14 AM, Michael Paquier
<michael(dot)paquier(at)gmail(dot)com> wrote:
> This is a collection of checks on relkind == RELKIND_PARTITIONED_TABLE
> to avoid interactions with partition tables. Did you consider doing
> something in the executor instead?
That seems inferior, because the planner really ought to know that the
partitioning root doesn't need to be scanned. That way, it can do a
better job getting the cost and selectivity estimates right.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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