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Re: explain refactoring v4

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: explain refactoring v4
Date: 2009-07-24 21:11:51
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Lists: pgsql-hackers
On Fri, Jul 24, 2009 at 4:02 PM, Tom Lane<tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Robert Haas <robertmhaas(at)gmail(dot)com> writes:
>> OK, here it is again.  Changes are the same as the previous version,
>> but this one should apply cleanly after today's pgindent run.
> As I was poking through this I noticed that it makes at least one small
> change in the output format: what had been "Subquery Scan ss" will now
> be "Subquery Scan on ss", because of the unification of code that wasn't
> really entirely consistent into one subroutine ExplainScanTarget.

Wow, nice catch.

> This is not likely to matter to human readers but it might to programs.
> OTOH we presumably expect programs to migrate to using a more
> program-friendly EXPLAIN output format with 8.5.
> Does anyone have strong feelings about whether we need to be
> bug-compatible with the old formatting?

I kind of doubt it.  Based on previous discussions, I gather that
PGadmin et al have to be adjusted for each release anyway.  But I also
don't think it's a big deal if we make it work the way it used to.


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