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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Andres Freund <andres@anarazel.de>
Cc: Maciek Sakrejda <m.sakrejda@gmail.com>
Cc: pgsql-hackers@postgresql.org <pgsql-hackers@postgresql.org>
Subject: Re: JIT performance bug/regression & JIT EXPLAIN
Date: Mon, 27 Jan 2020 16:18:33 -0500
Message-ID: <20518.1580159913@sss.pgh.pa.us> (raw)
In-Reply-To: <CA+TgmobX1h+KfGNWZ+egausdZy2OcX7yZm_Bw5X+FSQTnwMwqg@mail.gmail.com>
References: <20190927072053.njf6prdl3vb7y7qb@alap3.anarazel.de>
	<CA+TgmoZQ1691Mdp6_49nmmpRw7h5Z5CPDB5uD5CHVj1-fkSvsA@mail.gmail.com>
	<20191028232145.oj6jw3vnisikm7nl@alap3.anarazel.de>
	<CA+TgmoYXTchjLctjovKdWuqx+AhN0=D8qdRZT0YDc6s2rwrFfw@mail.gmail.com>
	<20191113200318.glenebxhlcu6crtr@alap3.anarazel.de>
	<CA+TgmoZb=U4m4pxXQ3Qj=dwMaJjq7omAKN3hPYfsRuWU+aY+DQ@mail.gmail.com>
	<CAOtHd0AtNzMhcBdf-rZyeHSYehwHUnAr4ULfHNwZhPv9o9gELw@mail.gmail.com>
	<18465.1580145353@sss.pgh.pa.us>
	<20200127174103.i4nxrzromqk24pfn@alap3.anarazel.de>
	<CA+TgmobX1h+KfGNWZ+egausdZy2OcX7yZm_Bw5X+FSQTnwMwqg@mail.gmail.com>

Robert Haas <robertmhaas@gmail.com> writes:
>>> I do not think that the readability-vs-usefulness tradeoff is going
>>> to be all that good there, anyway.  Certainly for testing purposes
>>> it's going to be more useful to examine portions of a structured output.

> I intensely dislike having information that we can't show in the text
> format, or really, that we can't show in every format.

Well, if it's relegated to a "jit = detail" option or some such,
the readability objection could be overcome.  But I'm still not clear
on how you'd physically wedge it into the output, at least not in a way
that matches up with the proposal that non-text modes handle this stuff
by producing sub-nodes for the existing types of expression fields.

			regards, tom lane





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