@Emir : The 'sow' parameter in edismax along with the nested query '_query_' works. Tuning has to be done for desired relevancy.
@Walter: It would be nice to have SOLR-629 integrated into the project. As Emir suggested, _query_ caters to my need by by applying fuzzy parameter to the query. Anyways, I will apply the patch and give it a try. On Wed, Feb 7, 2018 at 8:42 PM, Walter Underwood <wun...@wunderwood.org> wrote: > I think you need the feature in SOLR-629 that adds fuzzy to edismax. > > https://issues.apache.org/jira/browse/SOLR-629 > > The patch on that issue is for Solr 4.x, but I believe someone is working > on a new patch. > > wunder > Walter Underwood > wun...@wunderwood.org > http://observer.wunderwood.org/ (my blog) > > > On Feb 7, 2018, at 2:10 AM, Emir Arnautović < > emir.arnauto...@sematext.com> wrote: > > > > Hi Sravan, > > Edismax has ’sow’ parameter that results in edismax to pass query to > field analysis, but not sure how it will work with fuzzy search. What you > might do is use _query synthax to separate shingle and non shingle queries, > e.g. > > q=_query({!edismax sow=false qf=title_bigrams}$v) OR _query({!edismax > qf=title}$v)&$v=some movie title > > > > HTH, > > Emir > > -- > > Monitoring - Log Management - Alerting - Anomaly Detection > > Solr & Elasticsearch Consulting Support Training - http://sematext.com/ > > > > > > > >> On 7 Feb 2018, at 10:55, Sravan Kumar <sra...@caavo.com> wrote: > >> > >> We have the following two fields for our movie title search > >> - title without symbols > >> a custom analyser with WordDelimiterFilterFactory, SynonymFilterFactory > and > >> other filters to retain only alpha numeric characters. > >> - title with word bi grams > >> a custom analyser with solr.ShingleFilterFactory to generate "bi gram" > word > >> tokens with '_' as separator. > >> > >> A custom similarity class is used to make tf & idf values as 1. > >> > >> Edismax query parser is used to perform all searches. Phrase boosting > (pf) > >> is also used. > >> > >> There are couple of issues while searching: > >> 1> BiGram field doesn't generate bi grams if the white spaces in the > query > >> are not escaped. > >> - For example, if the query is "pursuit of happyness", then bi grams are > >> not generated. This is due to the fact that the edismax query parser > >> tokenizes based on whitespaces before passing the string to > >> analyser(correct me if I am wrong). > >> But in case of "pursuit\ of\ happyness", they are as the string which is > >> passed to the analyser is with the whitespace. > >> > >> 2> Fuzzy search doesn't work in whitespace escaped queries. > >> Ex: "pursuit~2\ of\ happiness~1" > >> > >> 3> Edismax's Phrase boosting doesn't work the way it should in > >> non-whitespace escaped fuzzy queries. > >> > >> If the query is "pursuit~2 of happiness~1" (without escaping > whitespaces) > >> > >> fuzzy queries are generated > >> (title_name:pursuit~2), (title_name:happiness~1) in the parsed query. > >> But,edismax pf (phrase boost) generates query like > >> title_name:"pursuit (2 pursuit2) of happiness (1 happiness1)" > >> This means the analyser got the original query consisting the fuzzy > >> operator for phrase boosting. > >> > >> > >> 1> How whitespaces should be handled in case of filters like > >> solr.ShingleFilterFactory to generate bi grams? > >> 2> If generating bi grams requires whitespaces escaped and fuzzy > searches > >> not, how do we accomodate both these in a single solr request and scored > >> together. > >> > >> > >> > >> - > >> -- > >> Regards, > >> Sravan > > > > -- Regards, Sravan
