Horton

Re: EXPLAIN and nfiltered, take two

Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>

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From: Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Robert Haas <robertmhaas@gmail.com>, Marko Tiikkaja <marko.tiikkaja@2ndquadrant.com>, Marti Raudsepp <marti@juffo.org>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2011-09-22T06:28:42Z
Lists: pgsql-hackers 
On 22.09.2011 07:51, Tom Lane wrote:
> Here's a revised version of the patch that behaves in a way that seems
> reasonable to me, in particular it suppresses zero filter-count rows in
> text mode.  I've not done anything yet about the documentation.

I haven't been following this closely, so sorry if this has already been 
discussed, but:

I find it a bit strange to print the number of lines filtered out. I 
think that's the only place where we would print a "negative" like that, 
everywhere else we print the number of lines let through a node. How 
about printing the number of lines that enter the filter, instead?

-- 
   Heikki Linnakangas
   EnterpriseDB   http://www.enterprisedb.com