This is really an apples/oranges comparison. They're essentially different queries, and scores aren't comparable across different queries.
If you're asking "if doc 1 and doc 2 are returned by defaulting to AND or OR, are they in the same position relative to each other?" then I'm pretty sure the answer is "you can't count on it". You'll match on different fields depending on what the default is, and with boosting you just don't know. Best, Erick On Wed, Jul 15, 2015 at 9:14 AM, Steven White <swhite4...@gmail.com> wrote: > By the way, using OR as the default, other than returning more results as > more words are entered, the ranking and performance of the search remains > the same right? > > Steve > > On Wed, Jul 15, 2015 at 12:12 PM, Steven White <swhite4...@gmail.com> wrote: > >> Thank you all. Looks like OR is a better choice vs. AND. >> >> Charles: I don't understand what you mean by the "spellcheck component". >> Do you mean OR works best with spell checker? >> >> Steve >> >> On Wed, Jul 15, 2015 at 11:07 AM, Reitzel, Charles < >> charles.reit...@tiaa-cref.org> wrote: >> >>> A common approach to this problem is to include the spellcheck component >>> and, if there are corrections, include a "Did you mean ..." link in the >>> results page. >>> >>> -----Original Message----- >>> From: Walter Underwood [mailto:wun...@wunderwood.org] >>> Sent: Wednesday, July 15, 2015 10:36 AM >>> To: solr-user@lucene.apache.org >>> Subject: Re: Which default Boolean operator to set, AND or OR? >>> >>> The AND default has one big problem. If the user misspells a single word, >>> they get no results. About 10% of queries are misspelled, so that means a >>> lot more failures. >>> >>> wunder >>> Walter Underwood >>> wun...@wunderwood.org >>> http://observer.wunderwood.org/ (my blog) >>> >>> >>> On Jul 15, 2015, at 7:21 AM, Jack Krupansky <jack.krupan...@gmail.com> >>> wrote: >>> >>> > It is simply precision (AND) vs. recall (OR) - the former tries to >>> > limit the total result count, while the latter tries to focus on >>> > relevancy of the top results even if the total result count is higher. >>> > >>> > Recall is good for discovery and browsing, where you sort of know what >>> > you generally want, but not exactly with any great precision. >>> > >>> > Recall will include results that almost meet the query terms, but >>> > maybe some are missing. >>> > >>> > Precision will guarantee and insist that all query terms are present. >>> > >>> > One great example for recall is a plagiarism query - enter all the >>> > terms for a passage and then find documents that most closely >>> > approximate the passage without being necessarily exact matches. IOW, >>> > the plagiarizer changes a word here and there. >>> > >>> > -- Jack Krupansky >>> > >>> > On Wed, Jul 15, 2015 at 8:16 AM, Steven White <swhite4...@gmail.com> >>> wrote: >>> > >>> >> Hi Everyone, >>> >> >>> >> Out-of-the box, Solr (Lucene?) is set to use OR as the default >>> >> Boolean operator. Can someone tell me the advantages / disadvantages >>> >> of using OR or AND as the default? >>> >> >>> >> I'm leaning toward AND as the default because the more words a user >>> >> types, the narrower the result set should be. >>> >> >>> >> Thanks >>> >> >>> >> Steve >>> >> >>> >>> >>> ************************************************************************* >>> This e-mail may contain confidential or privileged information. >>> If you are not the intended recipient, please notify the sender >>> immediately and then delete it. >>> >>> TIAA-CREF >>> ************************************************************************* >>> >>> >>
