public inbox for [email protected]  

help / color / mirror / Atom feed

From: Tom Lane <[email protected]>
To: Alvaro Herrera <[email protected]>
Cc: Jonathan S. Katz <[email protected]>
Cc: Bruce Momjian <[email protected]>
Cc: [email protected]
Cc: [email protected]
Subject: Re: Documentation for create unique index is insuficient and (because of that) incorrect
Date: Tue, 20 Nov 2018 13:15:30 -0500
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

Alvaro Herrera <[email protected]> writes:
> On 2018-Nov-20, Tom Lane wrote:
>> I'm also wondering whether to move that section someplace earlier
>> in chapter 11.  Right now it's near the end because it's mostly
>> info about an implementation detail; but it wouldn't be hard to
>> make the argument that covering indexes are more important than,
>> say, indexes with custom collations.  Should we move it, and if
>> so to where?

> I think right next to 11.5, which currently completes the topic of how
> are indexes used, is a good place.

Well, it has to stay after 11.6 (unique indexes), because we do need
to point out that the included columns don't participate in the
uniqueness constraint, and I don't want that statement to be a forward
reference.  Really this boils down to where you rank covering indexes
vs expression indexes and partial indexes in terms of usefulness.
I'd tend to put this after expression indexes, but I don't have a very
strong feeling about how to rank it versus partial indexes.

			regards, tom lane

view thread (11+ messages)

reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: [email protected]
  Cc: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
  Subject: Re: Documentation for create unique index is insuficient and (because of that) incorrect
  In-Reply-To: <[email protected]>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox