Re: bitmap scan and explain analyze

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Tatsuo Ishii <t-ishii(at)sra(dot)co(dot)jp>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: bitmap scan and explain analyze
Date: 2005-05-03 14:37:08
Message-ID: 8728.1115131028@sss.pgh.pa.us
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Tatsuo Ishii <t-ishii(at)sra(dot)co(dot)jp> writes:
> Why actual rows=0?

I couldn't think of any reasonably cheap way to count the actual rows
(especially in the presence of lossy bitmaps), so I just punted.

regards, tom lane

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