| From: | Alvaro Herrera from 2ndQuadrant <alvherre(at)alvh(dot)no-ip(dot)org> |
|---|---|
| To: | Richard Guo <riguo(at)pivotal(dot)io> |
| Cc: | Etsuro Fujita <etsuro(dot)fujita(at)gmail(dot)com>, Amit Langote <amitlangote09(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: A problem about partitionwise join |
| Date: | 2019-09-10 20:48:22 |
| Message-ID: | 20190910204822.GA9494@alvherre.pgsql |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
So in this patch, the input restrictlist is modified to include the
clauses generated by generate_join_implied_equalities_for_all. That
doesn't seem okay -- doesn't it affect downstream usage of the
restrictlist in the caller of set_joinrel_size_estimates?
I wonder if it's possible to do this by using the ECs directly in
have_partkey_equi_join instead of using them to create fake join
clauses.
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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