Re: Query is slower with a large proportion of NULLs in several columns

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Lars Bergeson <larsavatar(at)gmail(dot)com>
Cc: Justin Pryzby <pryzby(at)telsasoft(dot)com>, "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>, pgsql-performance(at)lists(dot)postgresql(dot)org
Subject: Re: Query is slower with a large proportion of NULLs in several columns
Date: 2021-12-21 23:07:52
Message-ID: 166329.1640128072@sss.pgh.pa.us
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Lars Bergeson <larsavatar(at)gmail(dot)com> writes:
> I'm running PostgreSQL under AWS Aurora, and I didn't set it up or install
> it, so I'm not sure about the OS version.

Oh! Aurora is not Postgres. My admittedly-not-well-informed
understanding is that they stuck a Postgres front end on their
existing storage engine, so it's not surprising if storage-level
behaviors are quite different from stock Postgres.

regards, tom lane

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