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From: Robert Haas <[email protected]>
To: Tom Lane <[email protected]>
Cc: Joshua Tolley <[email protected]>
Cc: Euler Taveira de Oliveira <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: explain analyze rows=%.0f
Date: Fri, 29 May 2009 14:39:23 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
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	<[email protected]>

On Fri, May 29, 2009 at 1:30 PM, Tom Lane <[email protected]> wrote:
> Joshua Tolley <[email protected]> writes:
>> On Thu, May 28, 2009 at 11:12:42PM -0400, Robert Haas wrote:
>>> On Thu, May 28, 2009 at 11:00 PM, Euler Taveira de Oliveira
>>>> 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.  :-(
>
>> +1. It would help users realize more quickly that some of the values in the
>> EXPLAIN output are, for instance, *average* number of rows *per iteration* of a
>> nested loop, say, rather than total rows found in all loops.
>
> I think it would only be sensible to show fractional digits if nloops is
> greater than 1.  Otherwise the value must in fact be an integer, and
> you're just going to confuse people more by suggesting that it might not
> be.

That might be over-engineering, but I'll take it.

...Robert

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