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The following page has been changed by MichaelLudwig: http://wiki.apache.org/solr/FilterQueryGuidance The comment on the change is: added note about facet.query - http://markmail.org/message/y25kuloq5ptmtqvb ------------------------------------------------------------------------------ and relatively limited in its valuespace looks like a candidate for the filter query (`fq`). + How does the `facet.query` parameter fit in with `q` and `fq` parameters? + It is also some kind of query, isn't it? + That's true; but as the name suggests, it is for [:SolrFacetingOverview: faceting], not for filtering. + A `facet.query` is just a more flexible means of defining a filter than possible using a mere `facet.field`. + While the `q` and `fq` affect the `results` portion of a search response, + the `facet.query` only affects the `facets` portion of a response. + The `facet.query` is only used where you want a facet summary of your query + based on some kind of complex expression + rather than the terms within a single field, as with `facet.field`. + It is not used for filtering the result set, + but to obtain faceting data in addition to result set. + == Configuring the `filterCache` == If I know that only 100 filters are possible,
