Thank you all for the asnwers :) James,I will answer in line : 2014/1/15 Dyer, James <[email protected]>
> Alessandro, > > > > The "spellcheck.collate" feature already supports this by specifying > "spellcheck.maxCollationTries" greater than zero. This is useful both to > prevent unauthorized access to data and also to guarantee that suggested > collations will return some results. > Looking to the wiki : "This parameter specifies the number of collation possibilities for Solr to try before giving up. Lower values ensure better performance. Higher values may be necessary to find a collation that can return results. The default value is 0, which maintains backwards-compatible (Solr 1.4) behavior (do not check collations). This parameter is ignored if spellcheck.collate is false." So you are suggesting to run the query with the related filter query, and thank's to this parameter return only a collation query that actually return results ? This can work, and I think is not a big deal in the overhead of performances :) > > > But "maxCollationTries" accomplishes this by running the proposed > collation queries against the index. If you are interested in preventing > unauthorized access only, then you can probably get better performance with > a lower-level filter on the term level. There is currently no way to > filter the single-term suggestions. > > > > I could see this as a nice enhancement, but given the current > "maxCollationTries" support, it may have a pretty narrow use-case. > What about the Suggester, how can I use the same strategy with that ?in that case we need fast response as well, and probably the approach I suggested to be internal can work well ? > > > I've also thought about moving all the collate functionality to the Lucene > level, so that clients other than Solr can take advantage of it. Perhaps > something along the lines of your proposal could be a work in that > direction? > > > > *James Dyer* > > Ingram Content Group > > (615) 213-4311 > > > > *From:* Alessandro Benedetti [mailto:[email protected]] > *Sent:* Wednesday, January 15, 2014 11:53 AM > *To:* [email protected] > *Subject:* Re: [Apache Solr] Filter query Suggester and Spellchecker > > > > No one? guys ? > > > > 2014/1/14 Alessandro Benedetti <[email protected]> > > Hi guys, > > this proposal will be for an improvement. > > I propose to add the chance of suggest terms ( for Spellchecking and Auto > Suggest) based only to a subset of Documents. > > > > In this way we can provide security implementations that will allow users > to see suggestions of terms , only from allowed to see documents. > > > > These are the proposed approaches : > > > > *Filter query Auto Suggest* > > > > 1) retrieve the suggested tokens from the input text using the already > cutting edge FST based suggester > > 2) use a similar approach of the TermEnum because > a) we have a small set of suggestions ( reasonable, because we can filter > to 5-10 suggestions max) > So the termEnum approach will be fast. > b) we can get for each suggested token the posting list and make the > intersection with the resulting DocId list ( from the filter query), if > null, not return the suggestion. > > > > *Filter query Spellcheck* > > > > 1) we can use the already cutting edge FSA based direct index spellchecker > and get the suggestions > > 2) use a similar approach of the TermEnum because > a) we have a small set of suggestions ( reasonable, because we can filter > to 5-10 suggestions max) > So the termEnum approach will be fast. > b) we can get for each suggested token the posting list and make the > intersection with the resulting DocId list ( from the filter query), if > null, not return the suggestion. > > > > Of course we will have to add a further parameter in the request handler, > something like : > > spellcheck.qf > > > > Let me know your impression and ideas, > > > > Cheers > > > > > > > > > > > -- > > -------------------------- > > Benedetti Alessandro > Visiting card : http://about.me/alessandro_benedetti > > "Tyger, tyger burning bright > In the forests of the night, > What immortal hand or eye > Could frame thy fearful symmetry?" > > William Blake - Songs of Experience -1794 England > > > > > > -- > > -------------------------- > > Benedetti Alessandro > Visiting card : http://about.me/alessandro_benedetti > > "Tyger, tyger burning bright > In the forests of the night, > What immortal hand or eye > Could frame thy fearful symmetry?" > > William Blake - Songs of Experience -1794 England > -- -------------------------- Benedetti Alessandro Visiting card : http://about.me/alessandro_benedetti "Tyger, tyger burning bright In the forests of the night, What immortal hand or eye Could frame thy fearful symmetry?" William Blake - Songs of Experience -1794 England
