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Add boolean or constant_score similarity #6731

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rmuir opened this issue Jul 4, 2014 · 4 comments
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Add boolean or constant_score similarity #6731

rmuir opened this issue Jul 4, 2014 · 4 comments
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@abeyad
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>enhancement help wanted adoptme :Search/Search Search-related issues that do not fall into other categories

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@rmuir
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rmuir commented Jul 4, 2014

The idea here is that some use cases don't need or want full-text ranking. In a lot of cases it can even hurt, for example: trying to use fuzzy query to find misspellings in a database of place names or something like that.

Today I think its too hard to turn off various measures such as IDF, we could just make it easy by providing a simple similarity out of box that users could enable.
@rmuir rmuir added the adoptme label Jul 4, 2014
@jpountz jpountz removed the adoptme label Aug 1, 2014
@rmuir
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rmuir commented Aug 1, 2014

I opened https://issues.apache.org/jira/browse/LUCENE-5867

@clintongormley clintongormley added >enhancement stalled :Search/Search Search-related issues that do not fall into other categories labels Nov 21, 2015
@clintongormley clintongormley added :Similarities help wanted adoptme and removed :Search/Search Search-related issues that do not fall into other categories stalled labels Nov 25, 2016
@clintongormley
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Boolean similarity is now in Lucene 6.4

@jpountz jpountz mentioned this issue Feb 15, 2017
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@jpountz jpountz added this to Search & Aggs in Background tasks Feb 16, 2017
@synhershko
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What is the status of this? is it exposed already?

@clintongormley
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Not yet

@abeyad abeyad assigned abeyad and unassigned rmuir Mar 12, 2017
abeyad pushed a commit to abeyad/elasticsearch that referenced this issue Mar 18, 2017
Adds boolean similarity to Elasticsearch
5968b92 
This commit adds the boolean similarity scoring from Lucene to
Elasticsearch.  The boolean similarity provides a means to specify that
a field should not be scored with typical full-text ranking algorithms,
but rather just whether the query terms match the document or not.
Boolean similarity scores a query term equal to its query boost only.
Boolean similarity is available as a default similarity option and thus
a field can be specified to have boolean similarity by declaring in its
mapping:
    "similarity": "boolean"

Closes elastic#6731
@abeyad abeyad mentioned this issue Mar 18, 2017
Merged
abeyad pushed a commit that referenced this issue Mar 28, 2017
Adds boolean similarity to Elasticsearch (#23637)
8359dd0 
This commit adds the boolean similarity scoring from Lucene to
Elasticsearch.  The boolean similarity provides a means to specify that
a field should not be scored with typical full-text ranking algorithms,
but rather just whether the query terms match the document or not.
Boolean similarity scores a query term equal to its query boost only.
Boolean similarity is available as a default similarity option and thus
a field can be specified to have boolean similarity by declaring in its
mapping:
    "similarity": "boolean"

Closes #6731
abeyad pushed a commit that referenced this issue Mar 28, 2017
Adds boolean similarity to Elasticsearch (#23637)
b5d833f 
This commit adds the boolean similarity scoring from Lucene to
Elasticsearch.  The boolean similarity provides a means to specify that
a field should not be scored with typical full-text ranking algorithms,
but rather just whether the query terms match the document or not.
Boolean similarity scores a query term equal to its query boost only.
Boolean similarity is available as a default similarity option and thus
a field can be specified to have boolean similarity by declaring in its
mapping:
    "similarity": "boolean"

Closes #6731
@jimczi jimczi removed this from Search & Aggs in Background tasks Apr 4, 2017
@clintongormley clintongormley added :Search/Search Search-related issues that do not fall into other categories and removed :Similarities labels Feb 14, 2018
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