public inbox for [email protected]  

help / color / mirror / Atom feed

From: Vik Fearing <[email protected]>
To: jian he <[email protected]>
Cc: Corey Huinker <[email protected]>
Cc: Isaac Morland <[email protected]>
Cc: [email protected]
Subject: Re: CAST(... ON DEFAULT) - WIP build on top of Error-Safe User Functions
Date: Thu, 24 Jul 2025 16:19:34 +0200
Message-ID: <[email protected]> (raw)
In-Reply-To: <CACJufxHhUD4u7PXUzT1T6hM9ZcQyj3eTyLMQmzREj+_5ca0_ug@mail.gmail.com>
References: <CADkLM=fv1JfY4Ufa-jcwwNbjQixNViskQ8jZu3Tz_p656i_4hQ@mail.gmail.com>
	<CAMsGm5dpfm2PHL8XZvC-JSd+UPkgx3rpReUA=G=4+rUCH+Ntcw@mail.gmail.com>
	<CADkLM=eD_S8mGhPfu5+hXXvXgR0-cxGpGd9dgPzD+nCuO7HFaQ@mail.gmail.com>
	<CACJufxHCMzrHOW=wRe8L30rMhB3sjwAv1LE928Fa7sxMu1Tx-g@mail.gmail.com>
	<[email protected]>
	<CACJufxGRAnwJzu7nMq4ZP=yqa1Sz=qR+mR1TmY0aCDjJoJRRtg@mail.gmail.com>
	<[email protected]>
	<CACJufxHhUD4u7PXUzT1T6hM9ZcQyj3eTyLMQmzREj+_5ca0_ug@mail.gmail.com>


On 24/07/2025 15:44, jian he wrote:
> just want to confirm my understanding of ``[ FORMAT <cast template> ]``.
>
> SELECT CAST('2022-13-32' AS DATE FORMAT 'YYYY-MM-DD' DEFAULT NULL ON
> CONVERSION ERROR);
> will return NULL.
> because  ``SELECT to_date('2022-13-32', 'YYYY-MM-DD');``
> will error out, so the above query will fall back to the DEFAULT
> expression evaluation.


That is correct.  Any error produced during typecasting will fall back 
to the DEFAULT value.  If not supplied, the behavior is ERROR ON ERROR 
as it currently is.


Any error produced while converting the DEFAULT value to the requested 
type is raised as an error.

-- 

Vik Fearing

view thread (75+ 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], [email protected]
  Subject: Re: CAST(... ON DEFAULT) - WIP build on top of Error-Safe User Functions
  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