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From: Alvaro Herrera from 2ndQuadrant <[email protected]>
To: Richard Guo <[email protected]>
Cc: Etsuro Fujita <[email protected]>
Cc: Amit Langote <[email protected]>
Cc: PostgreSQL-development <[email protected]>
Subject: Re: A problem about partitionwise join
Date: Tue, 10 Sep 2019 17:48:22 -0300
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAN_9JTxC8JdpCDDY0ic-VqQ4fbUGS9O_xas1pU6aXF4Q8imcKA@mail.gmail.com>

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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