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Re: EXPLAIN and nfiltered, take two

From: Marti Raudsepp <marti(at)juffo(dot)org>
To: Marko Tiikkaja <marko(dot)tiikkaja(at)2ndquadrant(dot)com>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: EXPLAIN and nfiltered, take two
Date: 2011-09-10 16:50:06
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Lists: pgsql-hackers

On Thu, Sep 8, 2011 at 15:11, Marko Tiikkaja
<marko(dot)tiikkaja(at)2ndquadrant(dot)com> wrote:
> Here's a patch for $SUBJECT based on the feedback here:

I tried this patch and noticed something weird. This is probably not

explain analyze select * from generate_series(1,10) i where i>1 and

Result  (cost=0.01..12.51 rows=333 width=4) (actual time=0.010..0.010
rows=0 loops=1)
  One-Time Filter: (now() <> now())
  ->  Function Scan on generate_series i  (cost=0.01..12.51 rows=333
width=4) (never executed)
        Filter: (i > 1)
        Rows Removed by Filter: -nan

Since it's never executed, nfiltered shows up as "-nan"


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