And the sky is blue and the night is black <shrug>
----- Original Message ---- From: Jonathan Rochkind <rochk...@jhu.edu> To: "solr-user@lucene.apache.org" <solr-user@lucene.apache.org> Sent: Wed, January 5, 2011 2:18:20 PM Subject: Re: (FQ) Filter Query Caching Differences with OR and AND? Um, good or bad for what? It depends. But it's how Solr works either way. On 1/5/2011 5:10 PM, Dennis Gearon wrote: > Is that good or bad? > > Dennis Gearon > > > > > ----- Original Message ---- > From: Jonathan Rochkind<rochk...@jhu.edu> > To: "solr-user@lucene.apache.org"<solr-user@lucene.apache.org> > Cc: Em<mailformailingli...@yahoo.de> > Sent: Wed, January 5, 2011 1:53:23 PM > Subject: Re: (FQ) Filter Query Caching Differences with OR and AND? > > Each 'fq' clause is it's own cache key. > > 1. fq=foo:bar OR foo:baz > => one entry in filter cache > > 2. fq=foo:bar&fq=foo:baz > => two entries in filter cache, will not use cached entry from #1 > > 3. fq=foo:bar > => One entry, will use cached entry from #2 > > 4. fq=foo:bar > => One entry, will use cached entry from #2. > > So if you do queries in succession using each of those four fq's in order, you > will wind up with 3 entries in the cache. > > Note that "fq=foo:bar OR foo:baz" is not semantically identical to > "fq=foo&fq=bar". Rather that latter is semantically identical to "fq=foo:bar > AND foo:baz". But "fq=foo&fq=bar" will be two cache entries, and "fq=foo:bar > AND foo:baz" will be one cache entry, and the two won't share any cache >entries. > > > On 1/5/2011 3:17 PM, Em wrote: >> Hi, >> >> while reading through some information on the list and in the wiki, i found >> out that something is missing: >> >> When I specify a filter queries like this >> >> fq=foo:bar OR foo:baz >> or >> fq=foo:bar&fq=foo:baz >> or >> fq=foo:bar >> or >> fq=foo:baz >> >> How many filter query entries will be cached? >> Two, since there are two filters (foo:bar, foo:baz) or 3, since there are >> three different combinations (foo:bar OR foo:baz, foo:bar, foo:baz)? >> >> Thank you! >
