[Xapian-discuss] Matches estimate varies with sorting method

Fabrice Colin fabrice.colin at gmail.com
Fri Oct 26 10:54:09 BST 2007

On 10/25/07, Olly Betts <olly at survex.com> wrote:
> On Mon, Oct 22, 2007 at 07:09:06PM +0800, Fabrice Colin wrote:
> > When sorting by relevance, all three get_matches methods return 10.
> The problem here is for the case where checkatleast is set, and we're
> sorting by relevance with forward ordering by docid, and the query is
> pure boolean.  The optimisation to terminate processing fires before
> the checkatleast requirement is satisfied, and adjustments made to the
> estimated and max statistics based on checkatleast then make the
> statistics wrong in the way we see.
> Can you confirm this patch fixes it for you:
> http://oligarchy.co.uk/xapian/patches/xapian-fix-checkatleast-boolean-sortforward.patch
Okay, I can confirm this patch fixes the problem I reported.
Thanks for that.


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