Re: Do table-level CHECK constraints affect the query optimizer?

From: Mark Dilger <mark(dot)dilger(at)enterprisedb(dot)com>
To: Ron <ronljohnsonjr(at)gmail(dot)com>
Cc: PostgreSQL General <pgsql-general(at)lists(dot)postgresql(dot)org>
Subject: Re: Do table-level CHECK constraints affect the query optimizer?
Date: 2021-06-29 18:03:59
Message-ID: F92A30BC-AE62-4130-A281-C3844EDEB49F@enterprisedb.com
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> On Jun 29, 2021, at 11:02 AM, Ron <ronljohnsonjr(at)gmail(dot)com> wrote:
>
> What's an IOS?

An Index Only Scan. See https://www.postgresql.org/docs/14/indexes-index-only-scans.html
—
Mark Dilger
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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