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From: Chapman Flack <chap@anastigmatix.net>
To: Pavel Stehule <pavel.stehule@gmail.com>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Subject: Re: PostgreSQL vs SQL/XML Standards
Date: Sun, 20 Jan 2019 21:41:44 -0500
Message-ID: <5C453168.9020203@anastigmatix.net> (raw)
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On 01/20/19 20:07, Chapman Flack wrote:

> So it appears that this example does not depend on any special treatment
> of the default_expression.
> 
> Is there an example that can be constructed that would depend on the
> special treatment (in which case, the PL/Java implementation would be
> unable to produce the same result)?

I see that I briefly forgot one difference that does matter, namely the
timing of a call to a volatile function like nextval. That detail certainly
needs to remain in the docs.

I am left wondering if that might be the only effect of the deferred
argument evaluation that really does matter.

Regards,
-Chap




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