named querylog, cache hit

[JINMEI Tatuya / 神明達哉]

At Tue, 19 May 2009 13:12:20 +0400,
Anatoly Pugachev <mator at team.co.ru> wrote:

> This is a request to enhancement. 
> 
> Is it possible to make named querylog log somehow if clients query hit
> the server cache or not, not regarding to other logged query options
> (like +EDC).

It's *possible* in that almost everything is possible in software, but
I suspect it's not so easy to modify the current implementation to
realize it because queries are logged in a very early stage of query
processing.  Besides, this feature may be controversial in the first
place because it's not an attribute of queries per se whether they hit
the cache.

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JINMEI, Tatuya
Internet Systems Consortium, Inc.