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From: Robert Haas <[email protected]>
To: Euler Taveira de Oliveira <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: explain analyze rows=%.0f
Date: Thu, 28 May 2009 23:12:42 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<[email protected]>

On Thu, May 28, 2009 at 11:00 PM, Euler Taveira de Oliveira
<[email protected]> wrote:
> Robert Haas escreveu:
>> I have always assumed that there is some very good reason why EXPLAIN
>> ANALYZE reports the number of rows as an integer rather than a
>> floating point value, but in reading explain.c it seems that the
>> reason is just that we decided to round to zero decimal places.  Any
>> chance we could reconsider this decision?  I often find myself wanting
>> to know the value that is here called ntuples, but rounding
>> ntuples/nloops off to the nearest integer loses too much precision.
>>
> Don't you think is too strange having, for example, 6.67 rows?

No stranger than having it say 7 when it's really not.  Actually mine
mostly come out 1 when the real value is somewhere between 0.5 and
1.49.  :-(

...Robert

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