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Posted to issues@lucy.apache.org by "David E. Wheeler (Commented) (JIRA)" <ji...@apache.org> on 2011/11/08 18:23:51 UTC
[lucy-issues] [jira] [Commented] (LUCY-183) Eliminate spurious "extra" query
normalization
[ https://issues.apache.org/jira/browse/LUCY-183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13146411#comment-13146411 ]
David E. Wheeler commented on LUCY-183:
---------------------------------------
The fix seems to have broken something else. See [this test failure|http://www.cpantesters.org/cpan/report/35c78d0a-09cf-11e1-90dc-a20eabe3e1f7], especially this:
{code}
# Failed test 'Should have results for simple search'
# at t/base.t line 274.
# Structures begin differing at:
# $got->{hits}[0]{excerpt} = 'This is the <strong>pair</strong><strong> README file. Here you will find all thingds related to </strong><strong>pair</strong>, including installation information'
# $expected->{hits}[0]{excerpt} = 'This is the <strong>pair</strong> README file. Here you will find all thingds related to <strong>pair</strong>, including installation information'
{code}
> Eliminate spurious "extra" query normalization
> ----------------------------------------------
>
> Key: LUCY-183
> URL: https://issues.apache.org/jira/browse/LUCY-183
> Project: Lucy
> Issue Type: Bug
> Components: Search
> Affects Versions: 0.1.0 (incubating), 0.2.0 (incubating), 0.2.1 (incubating)
> Reporter: Marvin Humphrey
> Assignee: Marvin Humphrey
> Fix For: 0.2.2 (incubating), 0.3.0 (incubating)
>
> Attachments: normalization.patch
>
>
> Query normalization is supposed to scale all scores uniformly by a simple
> multiplier, but the child nodes in complex queries are presently getting
> "extra" normalization applied to them. This has the effect of scaling
> different subqueries by different amounts, changing the balance of the
> subqueries within a complex query, interfering with IDF weighting and subtly
> degrading relevancy.
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