public inbox for [email protected]  

help / color / mirror / Atom feed

From: Alvaro Herrera <[email protected]>
To: Laurenz Albe <[email protected]>
Cc: Vik Fearing <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: Add support for AT LOCAL
Date: Mon, 12 Jun 2023 17:37:07 +0200
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

On 2023-Jun-06, Laurenz Albe wrote:

> At a quick glance, it looks like you resolve "timezone" at the time
> the query is parsed.  Shouldn't the resolution happen at query
> execution time?

Sounds like it -- consider the case where the timestamp value is a
partition key and one of the partition boundaries falls in between two
timezone offsets for some particular ts value; then you use a prepared
query to read from a view defined with AT LOCAL.  Partition pruning
would need to compute partitions to read from at runtime, not plan time.

-- 
Álvaro Herrera        Breisgau, Deutschland  —  https://www.EnterpriseDB.com/

view thread (8+ messages)  latest in thread

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]
  Subject: Re: Add support for AT LOCAL
  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