Thanks for getting back to me. I've added inline responses below. 2009/11/20 Grant Ingersoll <gsing...@apache.org> > > On Nov 20, 2009, at 3:15 AM, Oliver Beattie wrote: > > > Hi all, > > > > I'm a relative newcomer to Solr, and I'm trying to use it in a project > > of mine. I need to do a function query (I believe) to filter the > > results so they are within a certain distance of a point. For this, I > > understand I should use something like sqedist or hsin, and from the > > documentation on the FunctionQuery page, I believe that the function > > is executed on every "row" (or "record", not sure what the proper term > > for this is). So, my question is threefold really; are those functions > > the ones I should be using to perform a search where distance is one > > of the criteria (there are others), > > Short answer: yes. Long answer: I just committed those functions this week. > I believe they are good, but feedback is encouraged.
I'll be sure to let you know if I find anything report-worthy :) They're definitely super-useful for people doing similar things to I though, so great work :) > > and if so, does Solr execute the > > query on every row (and again, if so, is there any way of preventing > > this [like subqueries, though I know they're not supported])? > > You can use the frange capability to filter first. See > http://www.lucidimagination.com/blog/tag/frange/ Thanks for the link. I'll definitely do that. Does Solr execute the function on every row in the database on every query otherwise? > > Here's an example from a soon to be published article I'm writing: > http://localhost:8983/solr/select/?q=*:*&fq={!frange l=0 u=400}hsin(0.57, > -1.3, lat_rad, lon_rad, 3963.205) > > This should filter out all documents that are beyond 400 miles in distance > from that point on a sphere (specified in radians, see also the rads() method) > > > > > > > Sorry if this is a little confusing… any help would be greatly appreciated > > :) > > No worries, a lot of this spatial stuff is still being ironed out. See > https://issues.apache.org/jira/browse/SOLR-773 for the issue that is tracking > all of the related issues. The pieces are starting to come together and I'm > pretty excited about it b/c not only will it bring native spatial support to > Solr, it will also give Solr some exciting new general capabilities (sort by > function, pseudo-fields, facet by function, etc.)
