---------- Forwarded message ---------- From: Marius Dumitru Florea <mariusdumitru.flo...@xwiki.com> Date: Thu, Apr 3, 2014 at 6:03 PM Subject: Re: Re[2]: [xwiki-users] SearchSuggest parameters in a new syntax gives different behaviour To: Dmitry Bakbardin <haru_mamb...@mail.ru>
On Wed, Apr 2, 2014 at 2:03 PM, Dmitry Bakbardin <haru_mamb...@mail.ru> wrote: > Hi, Marius! > > See below. > > > Wed, 2 Apr 2014 10:41:32 +0300 от Marius Dumitru Florea > <mariusdumitru.flo...@xwiki.com>: > > On Wed, Apr 2, 2014 at 9:53 AM, Marius Dumitru Florea > <mariusdumitru.flo...@xwiki.com> wrote: >> Hi Dmitry, >> >> On Mon, Mar 31, 2014 at 5:33 AM, Dmitry Bakbardin <haru_mamb...@mail.ru> >> wrote: >>> Hi, all! >>> >>> 5.2 -> 5.4.3 Upgrade >>> >>> Xwiki.SearchSuggest objects were changed >>> >>> It was: >>> type:OBJECT AND (class:XWiki.BlogPostClass) AND objcontent:(__INPUT__*) >>> >>> It is: >>> fq=type:DOCUMENT >>> fq=class:Blog.BlogPostClass >>> qf=object.Blog.BlogPostClass >>> >>> The main difference: >>> - it was "__INPUT__*" query string and >>> - (as far as I understood) it is "__INPUT__" if parameter "q" is omitted >>> >>> The result is Solr Suggest changes it's behaviour and gives only exact >>> results. >>> To make Search Suggest running as it was, we have to add: "q=__INPUT__*" >>> >> >>> Is it done by puprpose or it is a bug and I have to "jira" it? >> >> On purpose. I did it as part of >> http://jira.xwiki.org/browse/XWIKI-10051 (check the documentation >> links). The reason I dropped the * (star) is because: >> >> (1) Prefix matching is costly > > > If Search Suggest is too costly, we can turn it off completely :) Not if there is a way to improve it. My idea was to offer by default something that performs well, but I agree that it could also be seen as an optimization. > > > >> (2) The search suggest is not a filter (in the sense that you have a >> list of item and you type some text and it filters the items starting >> with that text). Search is more complex. The search text is analysed, >> stop words are removed, etc. > > (3) It was a fake prefix matching, because if you typed more words, > only the last word was matched as prefix (not the entire text). All > the other were analysed. > > > IMHO, suggest means we prefer suggest more than exact search results. What I > mean, that all languages wich have declensioin are too sensitive to the > __INPUT__* search. > Usual use case for such a search is: you enter root of the word and get back > suggest of ALL forms of the word. > Even in English, which is much less "declensionable", singular and plural > is the case. > > E.g. "wiki" input will give only exact much and won't show "wikis". Thus, it > makes Solr Sugges much less relevant. typing "wiki" (without the quotes) definitely matches "wikis" if the document (default) language is English. That is not the problem. The "problem" is if you type "wik". > > >> >> As you said, you can get back the previous behaviour using "q=__INPUT__*" > > > Yes, it was the firs I did, 'cause nearly to all my search strings Solr gave > me "no results". It wasn't so "severe" before the upgrade. :) > > IMHO, it's better to leave "__INPUT__*" in default settings and amend > documentation with performance/relevancy issues tricks for Solr Suggest > tuning. "*" would be useful for most use cases, and would make Suggest > effective, especially for new users who start playing with XWike. > I do agree, that in the high load projects it could be essential to tweak > default behaviour or turn it off at all. I'd like to hear what others think about this. Do simple users expect the search suggest to perform a prefix match or a standard match? In other words, when a user types in the search suggest, does he type the whole word or just a few letters (a prefix)? Again, note that the previous behaviour was applying prefix matching only for the last "word" in the search query, not for all of the words in the query. Thanks, Marius > > >> >> Let me know what yo think, >> Marius >> >> >> >>> >>> >>> Kind regards, >>> >>> Dmitry >>> _______________________________________________ >>> users mailing list >>> users@xwiki.org >>> http://lists.xwiki.org/mailman/listinfo/users > > > > Kind regards, > > Dmitry _______________________________________________ users mailing list users@xwiki.org http://lists.xwiki.org/mailman/listinfo/users
