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Posted to notifications@couchdb.apache.org by GitBox <gi...@apache.org> on 2020/03/04 14:56:26 UTC
[GitHub] [couchdb] natcohen opened a new issue #2635: Best practice for
N-grame and set Lucene param with Clouseau
natcohen opened a new issue #2635: Best practice for N-grame and set Lucene param with Clouseau
URL: https://github.com/apache/couchdb/issues/2635
CouchDB/Clouseau indexing allows analyzers but what about n-gram tokenization? What is the best practive for n-grams? Should we use an algorithm to do n-grams within the index javascript function? Or can we take advantage of Lucene n-gram function?
Also how can we set Lucene parameters such as allowing leding wildcard (https://lucene.apache.org/core/4_0_0/queryparser/org/apache/lucene/queryparser/classic/QueryParserBase.html#setAllowLeadingWildcard(boolean))?
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[GitHub] [couchdb] natcohen commented on issue #2635: Best practice for
N-gram and set Lucene param with Clouseau
Posted by GitBox <gi...@apache.org>.
natcohen commented on issue #2635: Best practice for N-gram and set Lucene param with Clouseau
URL: https://github.com/apache/couchdb/issues/2635#issuecomment-598212487
@rnewson I'd love to contribute and add the n-gram analyzer. Unfortunately I don't know Erlang and working on Clouseau is a bit overwhelming since the project seams quite complex with very little documentation... I m also not an expert in Java so that doesn't help either!
Regarding the leading wildcard parameter, it was just an example! I don't plan to use it but wanted to know if there was a way to use all the parameters Lucene offers.
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[GitHub] [couchdb] rnewson commented on issue #2635: Best practice for
N-gram and set Lucene param with Clouseau
Posted by GitBox <gi...@apache.org>.
rnewson commented on issue #2635: Best practice for N-gram and set Lucene param with Clouseau
URL: https://github.com/apache/couchdb/issues/2635#issuecomment-606497843
hi @natcohen sorry for silence.
Appreciate the desire to help but things move forward in this project when folks contribute. It's useful to highlight a desire for this feature, though. If someone works on it to a reviewable standard, I'm sure someone will have time to help it the last few steps.
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[GitHub] [couchdb] natcohen commented on issue #2635: Best practice for
N-gram and set Lucene param with Clouseau
Posted by GitBox <gi...@apache.org>.
natcohen commented on issue #2635: Best practice for N-gram and set Lucene param with Clouseau
URL: https://github.com/apache/couchdb/issues/2635#issuecomment-601375396
@rnewson Partial search is widely used especially for auto-complete. Any chance someone can help exposing the n-gram analyzer? I have posted an issue to get some guidance [here](https://github.com/cloudant-labs/clouseau/issues/29) but Clouseau doesn't seem super active!
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[GitHub] [couchdb] rnewson commented on issue #2635: Best practice for
N-gram and set Lucene param with Clouseau
Posted by GitBox <gi...@apache.org>.
rnewson commented on issue #2635: Best practice for N-gram and set Lucene param with Clouseau
URL: https://github.com/apache/couchdb/issues/2635#issuecomment-598057020
We don't expose the NGram analyzers in Clouseau today but we'd consider merging a pull request if you want to add it.
We don't support setting of that parameter either, and I don't think we'd accept a patch to allow it given it has such bad performance implications.
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[GitHub] [couchdb] natcohen edited a comment on issue #2635: Best practice
for N-gram and set Lucene param with Clouseau
Posted by GitBox <gi...@apache.org>.
natcohen edited a comment on issue #2635: Best practice for N-gram and set Lucene param with Clouseau
URL: https://github.com/apache/couchdb/issues/2635#issuecomment-601375396
@rnewson Partial search is widely used especially for auto-complete. Any chance someone can help exposing the n-gram analyzer? I have posted an issue to get some guidance [here](https://github.com/cloudant-labs/clouseau/issues/29) but Clouseau doesn't seem super active!
PS There are other useful analyzers that would be great exposing such as n-gram edge...
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