Unfortunately, the stopword filter acts funny (depending on who you ask) in dismax. The short version is that the stopwords filter has to be on all fields being queried on for minimum matches to work. We have the same issue with one of our brands. We require all word matching so "The North Face" would never return any results because "the" is filtered out but mm still requires all 3 words to match.
So basically all fields MUST be put through the stopword filter for dismax to not have the issue. The long version of the answer can be found here: http://www.nabble.com/Dismax-Minimum-Match-Stopwords-Bug-td20960507.html On 2/11/09 8:49 AM, "Steven Hentschel" <steven.hentsc...@googlemail.com> wrote: > If a naive user enters a string that contains typical stopwords like "and" > and "the", these seem to be included in the word count for the must > match criteria of the the dismax query. > > So, if for example the mm parameter is the default " 2>-1 5>-2 > 6>90%" and the user enters something like "Jason and the Argonauts", > this won't match a document with that title because the word count is > treated as 4 and only 2 words match. As the dismax query is > recommended for naive users, wouldn't be more logical to apply the > mm criteria after applying the stopword filter on the query? > > Steven H.
