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From: Tom Lane <tgl@sss.pgh.pa.us>
To: David G. Johnston <david.g.johnston@gmail.com>
Cc: Arturo Guadagnin <tuirutuiru@gmail.com>
Cc: pgsql-sql@lists.postgresql.org <pgsql-sql@lists.postgresql.org>
Subject: Re: embedded composite types
Date: Sat, 20 Feb 2021 10:58:21 -0500
Message-ID: <3196308.1613836701@sss.pgh.pa.us> (raw)
In-Reply-To: <CAKFQuwamyzHNptbFL29wo7H4WwVTY6PV3SBwN51AzKB0bCkfGg@mail.gmail.com>
References: <60311f89.1c69fb81.3220e.2fd4@mx.google.com>
	<CAKFQuwamyzHNptbFL29wo7H4WwVTY6PV3SBwN51AzKB0bCkfGg@mail.gmail.com>

"David G. Johnston" <david.g.johnston@gmail.com> writes:
> On Saturday, February 20, 2021, Arturo Guadagnin <tuirutuiru@gmail.com>
> wrote:
>> I’m just wondering whether this is the expected behaviour or if there is
>> any syntactical magic I’m not aware of ....

> https://www.postgresql.org/docs/current/sql-expressions.html#FIELD-SELECTION

Yeah.  Also note that we only recently got around to fixing plpgsql
assignment to allow nested fields; that is

declare p Point2;
...
p.pt1.x = 42;

works in HEAD but not in any released version.

			regards, tom lane

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