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From "Mark Miller (JIRA)" <>
Subject [jira] Updated: (LUCENE-1907) sumOfSquared weights should be calculated as part of queryNorm
Date Fri, 20 Nov 2009 17:40:40 GMT


Mark Miller updated LUCENE-1907:

    Attachment: LUCENE-1907.patch

to trunk

> sumOfSquared weights should be calculated as part of queryNorm
> --------------------------------------------------------------
>                 Key: LUCENE-1907
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Bug
>            Reporter: Mark Miller
>            Priority: Minor
>         Attachments: LUCENE-1907.patch, LUCENE-1907.patch, LUCENE-1907.patch
> see the related issue for comments.
> its a bummer - doesn't look like we have time to address this, but its the best release
for it - back compat requires the reflection stuff that Similarity already has (and we hope
to remove next release). It would suck to have to hold onto it - so it seems unlikely we will
do this at a later time.
> The idea is that the sumOfSquaredWeights computation should be specific to the queryNorm
impl - so the queryNorm should accept the Weight instead, and if its using the euclidean distance
formula, it can do the sumOfSquared calculations - but if its doing another normalization,
these can be skipped (in each termweight, booleanweight, etc). Right now you pay for sumOfSquared
no matter what, and the logic separation is a little off.

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