How to use wildcards

[mads-hartmann]

Hi there,

How do I use wildcards? If I do something like the following:

val r = SolrBook where (_.title eqs "*game thr*")

then the wildcards gets escaped

r.meta.queryParams(r)
res13: Seq[(String, String)] = List((start,0), (rows,10), (q,title:("\*game thr\*")))

[holdenk]

Hi mads379,

By default all of our queries are escaped, we have a representation in our AST for it but not in the query language its self right now. I'll add that.

Cheers,

Holden

[holdenk]

Oh also, just a heads up that query is likely going to have terrible performance on Solr (front wildcards are slow). You might want to consider doing edgengram or ngram generation on a field if your going to be doing a lot of those types of queries.

[mads-hartmann]

Oh, interesting. Would you be able to point me in the right direction (reading wise) on how to efficiently use solr to search the following: Given a partial book title (entered by the user), list all books with that title. That is, if I search for "game of" it should show "A Game of Thrones".

[holdenk]

Well if you have tokenized your string (even with text_ws) "game of" will match "a game of thrones". You only really need the * if you were interested in "game of" matching "ninjagame ofthrones"

[mads-hartmann]

The thing is I want to match a sentence, so if you search with "game of" it shouldn't accept "book of games".

I appreciate your help :)

/Mads

[holdenk]

A phrase query should do just that, eqs gives you phrase style matching and contains gives you bag of words style matching.

[mads-hartmann]

eqs query combined with EdgeNGramFilterFactory & LowerCaseFilterFactory gives me good results so far. This wildcard query issue isn't a priority for me anymore so you don't need to hurry for my sake.

Thanks,
Mads