Solr supports multi value fields so you could store one document per customer and have multi value fields for the product information.
Colin. > -----Original Message----- > From: solr-user [mailto:solr-u...@hotmail.com] > Sent: Tuesday, December 01, 2009 6:27 PM > To: solr-user@lucene.apache.org > Subject: question about schemas > > > I just started using Solr, and I am trying to figure out how to setup > my > schema. I know that Solr doesn’t have JOINs, and so I am having some > difficulty figuring out how would I setup a schema for the following > fictional situation. For example, let us say that : > > - I have a 10000+ customers, each having some specific info > (StoreId , Name, > Phone, Address, City, State, Zip, etc) > - Each customer has a subset of the 100+ products I am looking to > track, > each product having some specific info (ProductId, Name, Width, Height, > Depth, Weight, Density, etc) > - I want to be able to search by the product info but have facets > return the > number of customers, rather than the number of products, that meet my > criteria > - I want to display (and sort) customers based on my product search > > In relational databases, I would simply create two tables (customer and > product) and JOIN them. I could then craft a sql query to count the > number > of distinct StoreId values in the result (something like facets). > > In Solr, however, there are no joins. As far as I can tell, my options > are > to: > > - create two Solr instances, one with customer info and one with > product > info; I would search the product Solr instance and identify the StoreId > values return, and then use that info to search the customer Solr > instance > to get the customer info. The problem with this is the second query > could > have ten thousand ANDs (one for each StoreId returned by the first > query) > - create a single Solr instance that contains a denormalized > version of the > data where each doc would contain both the customer info and the > product > info for a given product. The problem with this is that my facets > would > return the number of products, not the number of customers > - create a single Solr instance that contains a denormalized > version of the > data where each doc contains the customer info and info for ALL > products > that the customer might have (likely done via dynamicfields). The > problem > with this is that my schema would be a bit messy and that my queries > could > have hundreds of ANDs and Ors (one AND for each product field, and one > OR > for each product); for example, q=((Width1:50 AND Density1:7) OR > (Width2:50 > AND Density2:7) OR …) > > Does anyone have any advice on this? Are there other schemas that > might > work? Hopefully the example makes sense. > > -- > View this message in context: http://old.nabble.com/question-about- > schemas-tp26600956p26600956.html > Sent from the Solr - User mailing list archive at Nabble.com.
