Anyone else able to reply to this? Thanks
Greg -----Original Message----- From: Gregory Tarr Sent: 13 May 2011 15:46 To: 'java-user@lucene.apache.org' Subject: RE: SpanNearQuery - inOrder parameter Chris, and others Thanks for your reply. In effect what you are saying is that SpanNearQuery works as expected, and I should set inOrder=true to obtain the behaviour I require, even though I don't care about the order? Thanks Greg -----Original Message----- From: Chris Hostetter [mailto:hossman_luc...@fucit.org] Sent: 11 May 2011 00:32 To: java-user@lucene.apache.org Subject: RE: SpanNearQuery - inOrder parameter : I attach a junit test which shows strange behaviour of the inOrder : parameter on the SpanNearQuery constructor, using Lucene 2.9.4. : : My understanding of this parameter is that true forces the order and : false doesn't care about the order. : : Using true always works. However using false works fine when the terms : in the query are distinct, but if they are equivalent, e.g. searching : for "john john", I do not get the expected results. The workaround seems : to be to always use true for queries with repeated terms. I don't think the situation of "overlapping spans" has changed much since this thread... http://search.lucidimagination.com/search/document/ee23395e5a93c525/non_ overlapping_span_queries#868b3a3ec6431afc the crux of hte issue (as i recall) is that there is really no conecptual reason to why a query for "'john' near 'john', in any order, with slop of Z" shouldn't match a doc that contains only one instance of "john" ... the first SpanTermQuery says "i found a match at position X" the second SpanTermQuery says "i found a match at position Y" and the SpanNearQuery says "the differnece between X and Y is less then Z" therefore i have a match. (The SpanNearQuery can't fail just because X and Y are the same -- they might be two distinct term instances, with differnet payloads perhaps, that just happen to have the same position). However: if true==inOrder case works because the SpanNearQuery enforces that "X must be less then Y" so the same term can't ever match twice. -Hoss --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org Please consider the environment before printing this email. This message should be regarded as confidential. If you have received this email in error please notify the sender and destroy it immediately. Statements of intent shall only become binding when confirmed in hard copy by an authorised signatory. The contents of this email may relate to dealings with other companies within the Detica Limited group of companies. Detica Limited is registered in England under No: 1337451. Registered offices: Surrey Research Park, Guildford, Surrey, GU2 7YP, England. --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
